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Messages 8904 - 8933 of 10680   Oldest  |  < Older  |  Newer >  |  Newest
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8904
What's the Energy Density of the Vacuum? John Baez August 25, 1999 People talk a lot about "vacuum energy" or "zero-point energy" - that is, the energy density...
Edward Greenberg
green228
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Jan 1, 2004
11:03 am
8905
... Good question Ed, I am still looking for where I got the 185 GeV value. Wheeler's value was 175 GeV based on Dirac's virtual particle foam, but the values...
Jim Whitescarver
jimscarver
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Jan 2, 2004
2:30 am
8906
Jim, Do you still believe that the time-energy form of the Uncertainty Principle implies one can repeatedly extract energy from a system in its ground state,...
Edward Greenberg
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Jan 2, 2004
5:27 am
8907
... Absolutely. There is no error in my logic. As I said it is not possible in practice since there is no lower energy level for the energy to go to and...
Jim Whitescarver
jimscarver
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Jan 2, 2004
3:24 pm
8908
... in ... possible ... go to ... no ... probability ... zero in ... You are totally incorrect and totally confused (with special emphasis on TOTALLY). You...
Edward Greenberg
green228
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Jan 2, 2004
3:35 pm
8909
Ed, Who is profonticating now? I presented a complete proof. What part of it don't you agree with? Do you contend that the time energy uncertainty is not...
Jim Whitescarver
jimscarver
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Jan 2, 2004
4:32 pm
8910
... part of it ... uncertainty is ... absorbed to ... postulates ... Check *any* physics textbook. The ground state energy of the H atom is NOT zero. Same for...
Edward Greenberg
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Jan 2, 2004
5:13 pm
8911
Yes, atoms have energy due to mass, m*c^2, in the ground state, but the thermal energy, or temporature is zero. You must supercool H to get it a ground state...
Jim Whitescarver
jimscarver
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Jan 2, 2004
7:18 pm
8912
... the thermal energy, or temporature is zero. You must supercool H to get it a ground state with 50% probability, thats the best you can do. ... Mc^2 has...
Edward Greenberg
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Jan 2, 2004
7:29 pm
8913
... the thermal energy, or temporature is zero. ... Now you say the temperature is zero but earlier you emphatically stated that one couldn't get to zero...
Edward Greenberg
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Jan 2, 2004
7:51 pm
8914
Sorry if I misused the term "ground state" with respect to QM, I stand corrected. Thank you. Do they have a term in QM for the zero energy state where, for...
Jim Whitescarver
jimscarver
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Jan 2, 2004
7:58 pm
8915
... stand corrected. Thank you. Do they have a term in QM for the zero energy state where, for example in an atom, every electron is at the lowest possible...
Edward Greenberg
green228
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Jan 2, 2004
8:23 pm
8916
Indeed, I meant minimum state, not the ground state as defined in QM. It can only be in the minimum state at most 50% of the time so the average temperature...
Jim Whitescarver
jimscarver
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Jan 2, 2004
8:25 pm
8917
... uncertainty principle, conserving energy on average. This is not correct. The UP does not imply that energy conservation is violated. Note that each energy...
Edward Greenberg
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Jan 2, 2004
8:35 pm
8918
If a system has an energy e and uncertainty u, the measured values on repeated measurement will fluctuate between e-u and u+u. That is exactly what the...
Jim Whitescarver
jimscarver
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Jan 2, 2004
8:52 pm
8919
... on repeated measurement will fluctuate between e-u and u+u. That is exactly what the uncertainty principle says. ... Yes, but not on the same system....
Edward Greenberg
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Jan 2, 2004
9:16 pm
8920
You are talking silly Ed. Let me clearify. There is no way to measure the state of a quantum system without perturbing its state, there is no way of...
Jim Whitescarver
jimscarver
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Jan 2, 2004
9:37 pm
8921
... interactions ... uncertain. ... the ... I was planning to get into the perturbation issue tomorrow but this doesn't alter my fundamental argument. I don't...
Edward Greenberg
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Jan 2, 2004
10:52 pm
8922
Ed, these papers make my point better than I can. Determination of the ground-state features of a (non-relativistic) quantum mechanical system, J A Lobo, as...
Jim Whitescarver
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Jan 3, 2004
1:35 am
8923
Jim, My conclusion is that it's fruitless to try to have an intelligent physics discussion with you because, much like CHT, you have a habit of constantly...
Edward Greenberg
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Jan 3, 2004
8:38 am
8924
JW] The Lamb shift, Spontaneous emission, van der Waals forces, Atomic ground state stability, all contribute randomness to energy measurement. Arguing that an...
Edward Greenberg
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Jan 3, 2004
8:53 am
8925
I must be stupid Ed, I dont get why the time energy uncertainty principle does not apply here. But you conceed that there are random effects that effect...
Jim Whitescarver
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Jan 3, 2004
7:12 pm
8926
In the prior item, I meant photons, not protons of course, and the cosmic microwave background radiation is CMBR not CBMR......... sorry. The random electron...
Jim Whitescarver
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Jan 3, 2004
7:31 pm
8927
... From: Jim Whitescarver To: qm2@yahoogroups.com ; InfoPhysics@yahoogroups.com Sent: Saturday, January 03, 2004 9:17 PM Subject: Re: [qm2] Re: JW's Perpetual...
Edward Greenberg
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Jan 3, 2004
9:23 pm
8928
Sorry Ed. I don't want to waste time arguing dumb stuff any more than you do. But I keep hear you saying that measurements of a quantum system state in...
Jim Whitescarver
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Jan 3, 2004
11:40 pm
8929
"Do you think it will truly be possible to produce a theory of everything? A unified field theory that will explain all that exists in a simple equation which...
Jim Whitescarver
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Jan 4, 2004
2:24 am
8930
... From: Jim Whitescarver To: qm2@yahoogroups.com Sent: Sunday, January 04, 2004 1:46 AM Subject: Re: [qm2] Re: JW's Perpetual Motion Machine Sorry Ed. I...
Edward Greenberg
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Jan 4, 2004
1:53 pm
8931
I may be misreading you again, Ed. One minute we agree and the next we don't. I'll restate some simple facts about the UP you may be denying. It is a simple...
Jim Whitescarver
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Jan 4, 2004
5:49 pm
8932
... next we ... denying. ... broader ... a view ... about ... raised ... briefly ... vacuum ... vacuum ... predicted ... of the ... to ... reality the ... ...
Edward Greenberg
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Jan 4, 2004
7:59 pm
8933
Jim, I will make selective comments on issues that are clear to me since much of what you call 'standard' quantum theory is, I think, highly speculative and I...
Edward Greenberg
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Jan 4, 2004
9:03 pm
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