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| visits | member for | 11 months |
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1d |
comment |
Is all matter made of virtual particles? I think you should drop the first incomplete Feynman diagram as it only muddies the water IMHO. |
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May 20 |
revised |
Can we measure “wavefunction” of quantum particles? corrected typo |
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May 19 |
comment |
Can we measure “wavefunction” of quantum particles? It is still a measurement of the wave function, it is just not a complete measurement as the phase is lost. |
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May 19 |
answered | Can we measure “wavefunction” of quantum particles? |
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Apr 8 |
comment |
Does performing a measurement on a system change its internal energy? I am not sure what you mean by measurement on macroscopic scales. The usual picture is that you have a quantum system and you use a macroscopic measuring device. I am also not sure what you mean by a closed system. I suspect you are thinking of more refined treatments where you treat both the measuring device and quantum system using quantum mechanics. One needs to start looking at the theory of quantum decoherence in that case which is starting to go quite a bit beyond the simple (but often adequate) treatment I was referring to in my answer. |
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Apr 7 |
answered | Does performing a measurement on a system change its internal energy? |
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Feb 6 |
revised |
In QFT, why does a vanishing commutator ensure causality? spelling corrections |
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Feb 6 |
answered | In QFT, why does a vanishing commutator ensure causality? |
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Jan 20 |
comment |
Spinning spheres colliding I am not sure it is enlightening to bring chirality into this. I think the result you get just has to be consistent with the total angular momentum, obtained by vector addition, being conserved. |
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Jan 19 |
answered | Spinning spheres colliding |
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Nov 19 |
comment |
Can entropy be explained in terms of a cleaning/keeping your room clean? Civilians is a nice alternative name for non-physicists! |
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Nov 19 |
answered | A thought about Quasars |
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Nov 17 |
revised |
Applications of QFT in theoretical physics deleted 70 characters in body |
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Nov 17 |
comment |
Applications of QFT in theoretical physics I am not sure that early universe cosmology application is that well known. I have added some more details. |
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Nov 17 |
revised |
Applications of QFT in theoretical physics deleted 2 characters in body; added 180 characters in body |
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Nov 17 |
answered | Applications of QFT in theoretical physics |
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Nov 16 |
revised |
How does relativity lead to multi particles in Dirac and QFT, exactly edited body |
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Nov 16 |
revised |
How does relativity lead to multi particles in Dirac and QFT, exactly added 263 characters in body |
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Nov 15 |
answered | How does relativity lead to multi particles in Dirac and QFT, exactly |
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Oct 27 |
answered | Is there a quantum state for a large system |
