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	<title>Comments on: Quantum Anomaly and the Origin of Time</title>
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		<title>By: joel rice</title>
		<link>http://www.cambridgeblog.org/2008/11/quantum-anomaly-and-the-origin-of-time/comment-page-1/#comment-10585</link>
		<dc:creator>joel rice</dc:creator>
		<pubDate>Mon, 10 Aug 2009 16:04:45 +0000</pubDate>
		<guid isPermaLink="false">http://www.cambridgeblog.org/?p=1202#comment-10585</guid>
		<description>one issue that bothers me is whether the signature of spacetime
is sufficient to explain why it takes a clock to measure time, instead of a ruler, and why time seems to have a direction that spatial directions do not. Is Clifford algebra sufficient, or should we go for Octonion algebra ?
It seems like the last,best hope.</description>
		<content:encoded><![CDATA[<p>one issue that bothers me is whether the signature of spacetime<br />
is sufficient to explain why it takes a clock to measure time, instead of a ruler, and why time seems to have a direction that spatial directions do not. Is Clifford algebra sufficient, or should we go for Octonion algebra ?<br />
It seems like the last,best hope.</p>
]]></content:encoded>
	</item>
	<item>
		<title>By: socratus</title>
		<link>http://www.cambridgeblog.org/2008/11/quantum-anomaly-and-the-origin-of-time/comment-page-1/#comment-8383</link>
		<dc:creator>socratus</dc:creator>
		<pubDate>Sun, 28 Jun 2009 13:35:18 +0000</pubDate>
		<guid isPermaLink="false">http://www.cambridgeblog.org/?p=1202#comment-8383</guid>
		<description>Time and Quantum of Light.  / My opinion./     

Can Time Exist Without Matter? 
1.
According to Newton the answer is “ Yes”.
2.
According to SRT and GRT the answer is “ No”.
3.
Who is right? Who is wrong?
What is the resolution of this apparent paradox?
===========================..

  There are two kinds of time:
a) the proper (individual) time and
b) the planetary time.
They are so familiar that we rarely give them thought.
Don’t we know, that time for living being is limited
and the planetary time is absolute for them ? It is.
Maybe therefore Newton declared that time is absolute.
It “ flows equably without relation to  anything external”
he wrote in 1687. But Einstein had another opinion. 
He wanted to know: “ Where does the conception of time 
come from?”, “ What is the essence of time?”.
And to explain these questions he created two theories: 
SRT and GRT and declared that time is relative, changeable. 
1.
SRT explains behavior and the proper time of light
 quanta /electron. Why do I think so?
 a) 
One law (postulate) of SRT says that speed of light quanta
is constant c=1. Second law ( postulate ) says no another particle
 can reach this speed. So there are two incommensurable
 quantities. Is it possible to bind them together? No. I was
 taught at school from the first class  that the incommensurable
 quantities cannot be compared. The connection between these
 incommensurable quantities is similar to  the decision of a
 problem: “What will be if the  whale attacks the elephant?” 
We can see whale in a ocean and elephant in a savanna, 
but they never meet and fight in the same “ frame of reference”.
 And the same is about light quanta and another particles.
We cannot see them together in SRT. We can meet only the
 light quanta in SRT and  no other particles in it.
b)
 SRT was born from Maxwell&#039;s theory and it is a continuation
 of the electrodynamics’ development . The electron is a main
 and single hero in the Maxwell&#039;s theory and SRT. There
 isn&#039;t the Maxwell&#039;s theory / SRT without electron.
It is not correct to compare electron/ light quanta with another
 particles (protons…etc) and bodies (billiard balls, satellites,
astronauts, “twins”)  because they cannot  produce electromagnetic
 fields. The electron and  the another particles are also incommensurable
 quantities. They are  absolutely different objects.
c)
 Every epoch has its own delusion. Maxwell and Boltzmann
tried to explain electromagnetic fields using balls, wheels,
cog-wheels, springs…etc. H. Hertz, who demonstrated the  
existence of the electromagnetic waves,  wrote that the
electromagnetic waves didn’t have practice use. Etc…. 
 Now we try to compare electron/photon
ability with astronaut’s  and “twins’ ” opportunities. It is mistaken,
but what  to do? We do it because this is our way of cognition
:” From vague wish to the  bright thought”.  
2.
So, how SRT explains time from electron/ light quanta point of view. 
a)
 When light quanta is in state of a rest its  time is frozen,
 and its own clock shows zero.
b) 
When photon moves with constant speed c=1
its time is also frozen, and its own clock still shows zero.
c)
Only when photon moves with speed c&gt;1 its zero time
 changes and limited time appears. In this situation we
 know  photon as an electron. Photon works as an electron
and  SRT and Lorentz transformations explain this process.
d)
And when , for example, electron emits from an atom and
 interacts with Vacuum  all its parameters change. Its limited
 time ends and its own  clock shows zero again.  Now it lives 
 in infinite/ eternal  Vacuum until new incarnation, until its new
 work, maybe, in an atom (molecule), or in a cell, maybe, in a blade
	 of grass or in a tree, maybe, in an animal or in a person.
In another words:” We are living beings until Light quanta/
Electron is present and works in our body.”
Is it true? Yes, it is true. Why?
Because W. Pauli in 1924 wrote:&quot; Each quantum state in the atom
 is not limited of two electrons,  but only one electron&quot;.
It means in the atom can be only one, single electron. 
The electron manages the atom. If the atom contains more
 than one electron (for example – two), this atom represents
 “ Siamese twins”. Save us God of having such atoms and cells.
And the living being begins its life from one, singe cell.
What I am introducing here is what &#039; thinking photon/ electron&#039; exist .
I applied the quantum of light/ photon/ electron with a consciousness.
And His own consciousness is not static but can develop. 
The development of conscious scale goes
 &quot; from vague wishes up  to a clear thought &quot;. 
This evolution proceeds during hundred millions (billion) years.
e)
Trying to understand “ the electrodynamics of moving bodies”
Einstein wrote that it is the result of time and space changes.
It is not exactly correct , because these changes are secondary
 in  SRT. And the first point of SRT is that Quantum of light changes
 its spin. The former Planck/ Einstein’s spin (h) changes in  Goudsmit /
 Uhlenbeck&#039;s spin (h = h / 2pi), and as a result of this act all its parameters
change and the time and new space appear.                                       
3.
GRT explains the conditions of gravitation and the secret of
 planetary time. Why do I think so?
a)
When Einstein worked on GRT, he asked astronomers:
“ What is the average mass of matter in the Universe?”
 The result was lamentable. The quantity of mass was
insignificantly small. It was impossible to keep gravitation 
law  with such insignificantly  little mass and so, the Universe 
must be “open”, endless. But what to do with the infinite
 space, Einstein didn’t know. Therefore he took (from the
 heaven)  “ the cosmological constant” in order to “close”
the Universe. The taken mass was enough for creating the
 condition of gravitation. Without “ the cosmological constant”
 the  Universe is endless.
 b)
In 1922 Friedman wrote, that we could not take  “ the 
cosmological constant” in calculation. Instead of it, it is 
 enough to take “time”  and the Universe will be “closed”.
  Friedman was correct, but why? Because “time”, by its
 nature, is a limited  physical quantity and, be taken in
 mathematical calculation, automatically gives “closed” result.
c)
So, the detected material mass of the
 matter in the Universe is so small  (the average density 
of all substance in the Universe is approximately
 p=10^-30 g/sm^3) that the gravitation law doesn&#039;t work. 
Astronomers and astrophysicists know about this fact and  
therefore (to save the gravitation law) invented new matter
a &quot;dark matter&quot;, a new energy a “dark energy” and another
abstract objects. This “ invention” is only a result of our
 mentality , which says: ” If in a theory you meet infinity it
 means the theory is  nonsense”. It is very hard  to take that 
the  Universe is infinite. It is no easy matter to give up
 a lifetime of habit . 
d)
On my opinion it is impossible to use GRT to Universe as 
a whole. The Newton/ Einstein&#039;s gravitation laws are correct
only in the local parts of Vacuum. The Universe / Vacuum 
 as a whole is endless. 
 e)
So, how does GRT explain time?
According to GRT the time depends on the mass 
and speed it means, of moving matter. 
It means that different masses and speeds can create
different time. For example, our planet Earth has its
 own time but for us it is absolute.  
  The other planets have another mass and speed and
 therefore they have their own time. This time according
 to GRT is relative. But  their habitants will think that their
time is absolute. But if they know GRT they will
 not make this mistake.   
============= 
 According to SRT and GRT time is relative.
SRT says about proper/ individual time of an
 electron/ light quanta.
GRT says about planetary time of a Planet..
The time cannot exist without matter and speed,
in another words, without moving matter. But 
different reasons and different moving of a matter
 create the proper and planetary time.
=================..
Is it possible to see the different manifestation of
time in a human being?
Here is an article “ Even the time is pressed from fear” 
by  Dr. Vadim Chernobrov (collaborator of MAI -
- Moscow Aviation Institute). 
He wrote, that we usually think time is a constant quality.
But Einstein’s relative theory says time is relative.  
Question. Is it possible to check it in our life? 
Answer. Russian and foreign researches say it is
 possible. The documents (secret in the past) testify
 that “cataclysm of time”, “ phenomenon of time’s 
 perversion “,” the changes (its deceleration) of time”
 often is observed by people whose profession connected 
with risk: astronauts, pilots, drivers, soldiers.
1.
The test pilot Mark Gallay wrote in his book
“The test in the sky” when his airplane was caught
with fire “ the time began to go in another scale. The time
 almost stopped. Every second took ability of expansion,
and in this  situation it was  possible to do many things.” 
 He confirms that tested such feeling many times.
2.
The test pilot Marina L. Popovich said the same, 
in the dangerous, catastrophic situations “ the time
is stretches”.
3.
In June 1989 the soviet airplane MIG-29 crashed near 
Paris, in Le Bourget airport , in the time of its air show.
The notes of “the black box” showed that during the
 four (4)seconds the test pilot Anatoly Kvochur made as
 many operations as in normal situation it would take some
 minutes. The test pilot later said: ” the time was stretched”.
4.
The captain N.Z.(fought in Afghanistan) remembers:
“the fly of the bullet was so beautiful that I didn’t guess
 to evade from it, although I have enough time to do it”.
5.
The sergeant V. Ch (fought in Afghanistan) told:
“ The black barrel of gun seems very big, even enormous.
Time is stopped and full silence came. And I moved slowly 
a step a side and the bullet passed close to me.” 
6.
Etc…
His conclusions.
The people in a critical situation, on the border of death, 
suddenly for themselves begin to see everything as in the
 slow down film and in this time their speed reaction and 
power increase in tens and hundreds times. And this explains:
 a) why a man who escaped from wolves, can quickly reach 
up the  top of the naked tree,  
b) an old woman took out a big trunk from her burned  house,
which later two strong firemen couldn’t rise.
c) etc…
  =============..
My experience.
The speed on the curve was so fast that to keep the balance of 
the car I went on other  road line and flew straight at the
 “forehead’ of a green mercedes. The driver of the mercedes 
was in panic, in horror. He threw the wheel and  closed his face 
 with his hands. Suddenly the time stopped and the sound disappeared
for me and I made  many actions before my car kicked only the side
 back door  of the mercedes. It was long time ago, but writing this article
 I understood better what happened. 
Our computer-brain works on a dualistic basis (on two different neurons 
systems): 1) usually under logic program,
2) sometimes on intuition (subconscious).
Brain of a man approximately consists of sixteen milliards neurons.
 All of them form the system that manages human body. 
That is why that with the work of all the sixteen milliards neurons 
of brain, a man cannot catch a single impulse of his Electron, of his
Quantum of light, of his Soul: 
(mass of electron is equal 10^-31 kg., charge of electron is equal 10^-19 k.)
But in that time ( critical time ) most neurons of my brain stopped
their electric pulse (time almost stopped) and my Light Quanta/Electron
 in this new condition (superconductivity) had possibility to increase
 my speed reaction  and power on a short period of time . So, as SRT says, 
the Light Quanta in different systems ( even in our brain) can show us
 a different Time. The Light Quanta plays major role in the Nature,
in the Physics,  in our Life. 
===============. .
Best wishes. 
Israel Sadovnik. / Socratus.

http://www.worldnpa.org/php2/index.php?tab0=Scientists&amp;tab1=Display&amp;id=1372
========== . .</description>
		<content:encoded><![CDATA[<p>Time and Quantum of Light.  / My opinion./     </p>
<p>Can Time Exist Without Matter?<br />
1.<br />
According to Newton the answer is “ Yes”.<br />
2.<br />
According to SRT and GRT the answer is “ No”.<br />
3.<br />
Who is right? Who is wrong?<br />
What is the resolution of this apparent paradox?<br />
===========================..</p>
<p>  There are two kinds of time:<br />
a) the proper (individual) time and<br />
b) the planetary time.<br />
They are so familiar that we rarely give them thought.<br />
Don’t we know, that time for living being is limited<br />
and the planetary time is absolute for them ? It is.<br />
Maybe therefore Newton declared that time is absolute.<br />
It “ flows equably without relation to  anything external”<br />
he wrote in 1687. But Einstein had another opinion.<br />
He wanted to know: “ Where does the conception of time<br />
come from?”, “ What is the essence of time?”.<br />
And to explain these questions he created two theories:<br />
SRT and GRT and declared that time is relative, changeable.<br />
1.<br />
SRT explains behavior and the proper time of light<br />
 quanta /electron. Why do I think so?<br />
 a)<br />
One law (postulate) of SRT says that speed of light quanta<br />
is constant c=1. Second law ( postulate ) says no another particle<br />
 can reach this speed. So there are two incommensurable<br />
 quantities. Is it possible to bind them together? No. I was<br />
 taught at school from the first class  that the incommensurable<br />
 quantities cannot be compared. The connection between these<br />
 incommensurable quantities is similar to  the decision of a<br />
 problem: “What will be if the  whale attacks the elephant?”<br />
We can see whale in a ocean and elephant in a savanna,<br />
but they never meet and fight in the same “ frame of reference”.<br />
 And the same is about light quanta and another particles.<br />
We cannot see them together in SRT. We can meet only the<br />
 light quanta in SRT and  no other particles in it.<br />
b)<br />
 SRT was born from Maxwell&#8217;s theory and it is a continuation<br />
 of the electrodynamics’ development . The electron is a main<br />
 and single hero in the Maxwell&#8217;s theory and SRT. There<br />
 isn&#8217;t the Maxwell&#8217;s theory / SRT without electron.<br />
It is not correct to compare electron/ light quanta with another<br />
 particles (protons…etc) and bodies (billiard balls, satellites,<br />
astronauts, “twins”)  because they cannot  produce electromagnetic<br />
 fields. The electron and  the another particles are also incommensurable<br />
 quantities. They are  absolutely different objects.<br />
c)<br />
 Every epoch has its own delusion. Maxwell and Boltzmann<br />
tried to explain electromagnetic fields using balls, wheels,<br />
cog-wheels, springs…etc. H. Hertz, who demonstrated the<br />
existence of the electromagnetic waves,  wrote that the<br />
electromagnetic waves didn’t have practice use. Etc….<br />
 Now we try to compare electron/photon<br />
ability with astronaut’s  and “twins’ ” opportunities. It is mistaken,<br />
but what  to do? We do it because this is our way of cognition<br />
:” From vague wish to the  bright thought”.<br />
2.<br />
So, how SRT explains time from electron/ light quanta point of view.<br />
a)<br />
 When light quanta is in state of a rest its  time is frozen,<br />
 and its own clock shows zero.<br />
b)<br />
When photon moves with constant speed c=1<br />
its time is also frozen, and its own clock still shows zero.<br />
c)<br />
Only when photon moves with speed c&gt;1 its zero time<br />
 changes and limited time appears. In this situation we<br />
 know  photon as an electron. Photon works as an electron<br />
and  SRT and Lorentz transformations explain this process.<br />
d)<br />
And when , for example, electron emits from an atom and<br />
 interacts with Vacuum  all its parameters change. Its limited<br />
 time ends and its own  clock shows zero again.  Now it lives<br />
 in infinite/ eternal  Vacuum until new incarnation, until its new<br />
 work, maybe, in an atom (molecule), or in a cell, maybe, in a blade<br />
	 of grass or in a tree, maybe, in an animal or in a person.<br />
In another words:” We are living beings until Light quanta/<br />
Electron is present and works in our body.”<br />
Is it true? Yes, it is true. Why?<br />
Because W. Pauli in 1924 wrote:&#8221; Each quantum state in the atom<br />
 is not limited of two electrons,  but only one electron&#8221;.<br />
It means in the atom can be only one, single electron.<br />
The electron manages the atom. If the atom contains more<br />
 than one electron (for example – two), this atom represents<br />
 “ Siamese twins”. Save us God of having such atoms and cells.<br />
And the living being begins its life from one, singe cell.<br />
What I am introducing here is what &#8216; thinking photon/ electron&#8217; exist .<br />
I applied the quantum of light/ photon/ electron with a consciousness.<br />
And His own consciousness is not static but can develop.<br />
The development of conscious scale goes<br />
 &#8221; from vague wishes up  to a clear thought &#8220;.<br />
This evolution proceeds during hundred millions (billion) years.<br />
e)<br />
Trying to understand “ the electrodynamics of moving bodies”<br />
Einstein wrote that it is the result of time and space changes.<br />
It is not exactly correct , because these changes are secondary<br />
 in  SRT. And the first point of SRT is that Quantum of light changes<br />
 its spin. The former Planck/ Einstein’s spin (h) changes in  Goudsmit /<br />
 Uhlenbeck&#8217;s spin (h = h / 2pi), and as a result of this act all its parameters<br />
change and the time and new space appear.<br />
3.<br />
GRT explains the conditions of gravitation and the secret of<br />
 planetary time. Why do I think so?<br />
a)<br />
When Einstein worked on GRT, he asked astronomers:<br />
“ What is the average mass of matter in the Universe?”<br />
 The result was lamentable. The quantity of mass was<br />
insignificantly small. It was impossible to keep gravitation<br />
law  with such insignificantly  little mass and so, the Universe<br />
must be “open”, endless. But what to do with the infinite<br />
 space, Einstein didn’t know. Therefore he took (from the<br />
 heaven)  “ the cosmological constant” in order to “close”<br />
the Universe. The taken mass was enough for creating the<br />
 condition of gravitation. Without “ the cosmological constant”<br />
 the  Universe is endless.<br />
 b)<br />
In 1922 Friedman wrote, that we could not take  “ the<br />
cosmological constant” in calculation. Instead of it, it is<br />
 enough to take “time”  and the Universe will be “closed”.<br />
  Friedman was correct, but why? Because “time”, by its<br />
 nature, is a limited  physical quantity and, be taken in<br />
 mathematical calculation, automatically gives “closed” result.<br />
c)<br />
So, the detected material mass of the<br />
 matter in the Universe is so small  (the average density<br />
of all substance in the Universe is approximately<br />
 p=10^-30 g/sm^3) that the gravitation law doesn&#8217;t work.<br />
Astronomers and astrophysicists know about this fact and<br />
therefore (to save the gravitation law) invented new matter<br />
a &#8220;dark matter&#8221;, a new energy a “dark energy” and another<br />
abstract objects. This “ invention” is only a result of our<br />
 mentality , which says: ” If in a theory you meet infinity it<br />
 means the theory is  nonsense”. It is very hard  to take that<br />
the  Universe is infinite. It is no easy matter to give up<br />
 a lifetime of habit .<br />
d)<br />
On my opinion it is impossible to use GRT to Universe as<br />
a whole. The Newton/ Einstein&#8217;s gravitation laws are correct<br />
only in the local parts of Vacuum. The Universe / Vacuum<br />
 as a whole is endless.<br />
 e)<br />
So, how does GRT explain time?<br />
According to GRT the time depends on the mass<br />
and speed it means, of moving matter.<br />
It means that different masses and speeds can create<br />
different time. For example, our planet Earth has its<br />
 own time but for us it is absolute.<br />
  The other planets have another mass and speed and<br />
 therefore they have their own time. This time according<br />
 to GRT is relative. But  their habitants will think that their<br />
time is absolute. But if they know GRT they will<br />
 not make this mistake.<br />
=============<br />
 According to SRT and GRT time is relative.<br />
SRT says about proper/ individual time of an<br />
 electron/ light quanta.<br />
GRT says about planetary time of a Planet..<br />
The time cannot exist without matter and speed,<br />
in another words, without moving matter. But<br />
different reasons and different moving of a matter<br />
 create the proper and planetary time.<br />
=================..<br />
Is it possible to see the different manifestation of<br />
time in a human being?<br />
Here is an article “ Even the time is pressed from fear”<br />
by  Dr. Vadim Chernobrov (collaborator of MAI -<br />
- Moscow Aviation Institute).<br />
He wrote, that we usually think time is a constant quality.<br />
But Einstein’s relative theory says time is relative.<br />
Question. Is it possible to check it in our life?<br />
Answer. Russian and foreign researches say it is<br />
 possible. The documents (secret in the past) testify<br />
 that “cataclysm of time”, “ phenomenon of time’s<br />
 perversion “,” the changes (its deceleration) of time”<br />
 often is observed by people whose profession connected<br />
with risk: astronauts, pilots, drivers, soldiers.<br />
1.<br />
The test pilot Mark Gallay wrote in his book<br />
“The test in the sky” when his airplane was caught<br />
with fire “ the time began to go in another scale. The time<br />
 almost stopped. Every second took ability of expansion,<br />
and in this  situation it was  possible to do many things.”<br />
 He confirms that tested such feeling many times.<br />
2.<br />
The test pilot Marina L. Popovich said the same,<br />
in the dangerous, catastrophic situations “ the time<br />
is stretches”.<br />
3.<br />
In June 1989 the soviet airplane MIG-29 crashed near<br />
Paris, in Le Bourget airport , in the time of its air show.<br />
The notes of “the black box” showed that during the<br />
 four (4)seconds the test pilot Anatoly Kvochur made as<br />
 many operations as in normal situation it would take some<br />
 minutes. The test pilot later said: ” the time was stretched”.<br />
4.<br />
The captain N.Z.(fought in Afghanistan) remembers:<br />
“the fly of the bullet was so beautiful that I didn’t guess<br />
 to evade from it, although I have enough time to do it”.<br />
5.<br />
The sergeant V. Ch (fought in Afghanistan) told:<br />
“ The black barrel of gun seems very big, even enormous.<br />
Time is stopped and full silence came. And I moved slowly<br />
a step a side and the bullet passed close to me.”<br />
6.<br />
Etc…<br />
His conclusions.<br />
The people in a critical situation, on the border of death,<br />
suddenly for themselves begin to see everything as in the<br />
 slow down film and in this time their speed reaction and<br />
power increase in tens and hundreds times. And this explains:<br />
 a) why a man who escaped from wolves, can quickly reach<br />
up the  top of the naked tree,<br />
b) an old woman took out a big trunk from her burned  house,<br />
which later two strong firemen couldn’t rise.<br />
c) etc…<br />
  =============..<br />
My experience.<br />
The speed on the curve was so fast that to keep the balance of<br />
the car I went on other  road line and flew straight at the<br />
 “forehead’ of a green mercedes. The driver of the mercedes<br />
was in panic, in horror. He threw the wheel and  closed his face<br />
 with his hands. Suddenly the time stopped and the sound disappeared<br />
for me and I made  many actions before my car kicked only the side<br />
 back door  of the mercedes. It was long time ago, but writing this article<br />
 I understood better what happened.<br />
Our computer-brain works on a dualistic basis (on two different neurons<br />
systems): 1) usually under logic program,<br />
2) sometimes on intuition (subconscious).<br />
Brain of a man approximately consists of sixteen milliards neurons.<br />
 All of them form the system that manages human body.<br />
That is why that with the work of all the sixteen milliards neurons<br />
of brain, a man cannot catch a single impulse of his Electron, of his<br />
Quantum of light, of his Soul:<br />
(mass of electron is equal 10^-31 kg., charge of electron is equal 10^-19 k.)<br />
But in that time ( critical time ) most neurons of my brain stopped<br />
their electric pulse (time almost stopped) and my Light Quanta/Electron<br />
 in this new condition (superconductivity) had possibility to increase<br />
 my speed reaction  and power on a short period of time . So, as SRT says,<br />
the Light Quanta in different systems ( even in our brain) can show us<br />
 a different Time. The Light Quanta plays major role in the Nature,<br />
in the Physics,  in our Life.<br />
===============. .<br />
Best wishes.<br />
Israel Sadovnik. / Socratus.</p>
<p><a href="http://www.worldnpa.org/php2/index.php?tab0=Scientists&amp;tab1=Display&amp;id=1372" rel="nofollow">http://www.worldnpa.org/php2/index.php?tab0=Scientists&amp;tab1=Display&amp;id=1372</a><br />
========== . .</p>
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		<title>By: Mariusz</title>
		<link>http://www.cambridgeblog.org/2008/11/quantum-anomaly-and-the-origin-of-time/comment-page-1/#comment-3598</link>
		<dc:creator>Mariusz</dc:creator>
		<pubDate>Fri, 20 Mar 2009 00:55:10 +0000</pubDate>
		<guid isPermaLink="false">http://www.cambridgeblog.org/?p=1202#comment-3598</guid>
		<description>Hi, you mentioned lately at Cambridge Science Festival that Apollo mission to the Moon measured delay of it&#039;s own clock by 10 [us]. This is an example of the twin paradox. How would you explain this paradox from the quantum mechanic point of view.</description>
		<content:encoded><![CDATA[<p>Hi, you mentioned lately at Cambridge Science Festival that Apollo mission to the Moon measured delay of it&#8217;s own clock by 10 [us]. This is an example of the twin paradox. How would you explain this paradox from the quantum mechanic point of view.</p>
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		<title>By: Shahn Majid</title>
		<link>http://www.cambridgeblog.org/2008/11/quantum-anomaly-and-the-origin-of-time/comment-page-1/#comment-1560</link>
		<dc:creator>Shahn Majid</dc:creator>
		<pubDate>Tue, 02 Dec 2008 16:26:57 +0000</pubDate>
		<guid isPermaLink="false">http://www.cambridgeblog.org/?p=1202#comment-1560</guid>
		<description>Hi Peter, you make some good points. 

I broadly agree with your list, but which of these items is the definition of time or are these all potentially different usages of the word, as some say different `arrows of time&#039;?

 In the latter case, the question for me is which one of these is science and/or fundamental and which are merely sociology. I do think we need to disentangle the various usages of `time&#039; by taking a stand. Science after all has to have clear unified notions and not things `multiply defined&#039;. 

But I agree that if time is sort of constructed then this may explain why it moves forward. In a previous post I used this as a view of `thermodynamic time&#039;. 

Time as understood in general relativity has a causal arrow in any connected region. Basically, while an isolated region might have a different arrow, for regions to interact their arrows have to line up. This is the conventional thinking anyway (it is called a choice of time-orientation). Closed time-like loops such as you refer to would violate causality and are not expected to exist for this reason, though I agree with you that from a purely geometrical point of view they could. There is certainly no hint of that in observational cosmology, but see my post of some weeks ago 

http://www.cambridgeblog.org/2008/10/before-the-birth-of-our-universe-and-after-its-death/

on Penrose&#039;s theory of repeating universes, which is not what you refer to of course but interesting and might just
be verifiable experimentally. The thing is that a closed time-like loop might make sense of a particle but information, free will and many things not really encompassed by particle physics and just the geometry would not make sense, in my view of course.</description>
		<content:encoded><![CDATA[<p>Hi Peter, you make some good points. </p>
<p>I broadly agree with your list, but which of these items is the definition of time or are these all potentially different usages of the word, as some say different `arrows of time&#8217;?</p>
<p> In the latter case, the question for me is which one of these is science and/or fundamental and which are merely sociology. I do think we need to disentangle the various usages of `time&#8217; by taking a stand. Science after all has to have clear unified notions and not things `multiply defined&#8217;. </p>
<p>But I agree that if time is sort of constructed then this may explain why it moves forward. In a previous post I used this as a view of `thermodynamic time&#8217;. </p>
<p>Time as understood in general relativity has a causal arrow in any connected region. Basically, while an isolated region might have a different arrow, for regions to interact their arrows have to line up. This is the conventional thinking anyway (it is called a choice of time-orientation). Closed time-like loops such as you refer to would violate causality and are not expected to exist for this reason, though I agree with you that from a purely geometrical point of view they could. There is certainly no hint of that in observational cosmology, but see my post of some weeks ago </p>
<p><a href="http://www.cambridgeblog.org/2008/10/before-the-birth-of-our-universe-and-after-its-death/" rel="nofollow">http://www.cambridgeblog.org/2008/10/before-the-birth-of-our-universe-and-after-its-death/</a></p>
<p>on Penrose&#8217;s theory of repeating universes, which is not what you refer to of course but interesting and might just<br />
be verifiable experimentally. The thing is that a closed time-like loop might make sense of a particle but information, free will and many things not really encompassed by particle physics and just the geometry would not make sense, in my view of course.</p>
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		<title>By: Peter Day</title>
		<link>http://www.cambridgeblog.org/2008/11/quantum-anomaly-and-the-origin-of-time/comment-page-1/#comment-1528</link>
		<dc:creator>Peter Day</dc:creator>
		<pubDate>Sun, 30 Nov 2008 03:49:13 +0000</pubDate>
		<guid isPermaLink="false">http://www.cambridgeblog.org/?p=1202#comment-1528</guid>
		<description>Time exists for a number of reasons. First, because the universe changes. If nothing changed there would be no time within the universe. Second, because we have memory. We can thereby detect change. Third, because we have defined a concept that we call &quot;time&quot; to capture the sense of change that we can detect. Fourth, because we can measure what we call time using periodic physical phenomena. This is the generalization of a clock. Fifth, because we can record the change in time using systems in which changes accumulate. It is not enough to have a clock. We also need a calendar. 

Since time is recorded as an accumulation of changes, time always moves forward. If instead the universe was in a loop so that its entire state was continually revisited, then time as we know it would not exist for the universe. It might not make a difference to us if the length of time as we measured it were really long (say a billion years), but astronomers could not make the assumption that they could look back in time using red shift.</description>
		<content:encoded><![CDATA[<p>Time exists for a number of reasons. First, because the universe changes. If nothing changed there would be no time within the universe. Second, because we have memory. We can thereby detect change. Third, because we have defined a concept that we call &#8220;time&#8221; to capture the sense of change that we can detect. Fourth, because we can measure what we call time using periodic physical phenomena. This is the generalization of a clock. Fifth, because we can record the change in time using systems in which changes accumulate. It is not enough to have a clock. We also need a calendar. </p>
<p>Since time is recorded as an accumulation of changes, time always moves forward. If instead the universe was in a loop so that its entire state was continually revisited, then time as we know it would not exist for the universe. It might not make a difference to us if the length of time as we measured it were really long (say a billion years), but astronomers could not make the assumption that they could look back in time using red shift.</p>
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		<title>By: Ronald</title>
		<link>http://www.cambridgeblog.org/2008/11/quantum-anomaly-and-the-origin-of-time/comment-page-1/#comment-1506</link>
		<dc:creator>Ronald</dc:creator>
		<pubDate>Thu, 27 Nov 2008 14:01:35 +0000</pubDate>
		<guid isPermaLink="false">http://www.cambridgeblog.org/?p=1202#comment-1506</guid>
		<description>Just saying Helllooooo Shahn.</description>
		<content:encoded><![CDATA[<p>Just saying Helllooooo Shahn.</p>
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		<title>By: Shahn Majid</title>
		<link>http://www.cambridgeblog.org/2008/11/quantum-anomaly-and-the-origin-of-time/comment-page-1/#comment-1360</link>
		<dc:creator>Shahn Majid</dc:creator>
		<pubDate>Wed, 19 Nov 2008 21:00:46 +0000</pubDate>
		<guid isPermaLink="false">http://www.cambridgeblog.org/?p=1202#comment-1360</guid>
		<description>Hi Ronald,

thanks for the comment and for the link. I see that you have a lot of useful links on your site. I already found under Shlomo a link to several of Shlomo Sternbergs books as free pdfs. He was one of my mentors at Harvard when I was a student there. Julian Barbour&#039;s books are definitely on my list to read some day when I have time. As well as &quot;The End of Time&quot; he has as book on Mach which has been highly recommended.</description>
		<content:encoded><![CDATA[<p>Hi Ronald,</p>
<p>thanks for the comment and for the link. I see that you have a lot of useful links on your site. I already found under Shlomo a link to several of Shlomo Sternbergs books as free pdfs. He was one of my mentors at Harvard when I was a student there. Julian Barbour&#8217;s books are definitely on my list to read some day when I have time. As well as &#8220;The End of Time&#8221; he has as book on Mach which has been highly recommended.</p>
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		<title>By: Ronald</title>
		<link>http://www.cambridgeblog.org/2008/11/quantum-anomaly-and-the-origin-of-time/comment-page-1/#comment-1357</link>
		<dc:creator>Ronald</dc:creator>
		<pubDate>Wed, 19 Nov 2008 18:12:22 +0000</pubDate>
		<guid isPermaLink="false">http://www.cambridgeblog.org/?p=1202#comment-1357</guid>
		<description>Excellent blog I must say. Julian Barbour with his book &quot;The end of Time&quot; shows also a nice piece of natural philosophy.

Just to let you know guys....if you are interested (and you are) in high quality physics links, then visit my site:

http://www.physicsworks.ca

Thanks and see you around, 

Ronald</description>
		<content:encoded><![CDATA[<p>Excellent blog I must say. Julian Barbour with his book &#8220;The end of Time&#8221; shows also a nice piece of natural philosophy.</p>
<p>Just to let you know guys&#8230;.if you are interested (and you are) in high quality physics links, then visit my site:</p>
<p><a href="http://www.physicsworks.ca" rel="nofollow">http://www.physicsworks.ca</a></p>
<p>Thanks and see you around, </p>
<p>Ronald</p>
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