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Physics Stack Exchange users whose comments are worth studying include Lubos Motl and Ron Maimon (now at http://www.quora.com/Ron-Maimon and http://www.physicsoverflow.org/user/Ron+Maimon). Also see http://arxiv.org/abs/hep-ph/0207124 for a review of physics since the standard model.


Sep
25
comment How to determine the amount of light energy (photons) being released from an incandescent light bulb?
True. But if I do write the perfect answer to this question, I will probably discuss the simpler case of a free atom, as in a gas, before moving on to the harder case of atoms in a solid.
Sep
25
comment How to determine the amount of light energy (photons) being released from an incandescent light bulb?
The central question seems to be, what is the recoil of an atom when one of its electrons emits a photon, and in particular how does this recoil affect the nucleus. Then to ask further about the quarks, is to ask how quarks respond when the nucleons that contain them are shaken.
Sep
25
comment How to determine the amount of light energy (photons) being released from an incandescent light bulb?
Process 1-3 happens in light bulbs. True, we don't normally analyze light bulbs on the Planck scale. However, I will try to answer the question.
Sep
20
comment Quantum Number of a Tennis Ball
Presumably one is supposed to think of the ball as a point particle with the mass of a tennis ball, rather than as an extended object with 10^23 internal degrees of freedom.
Sep
19
comment Equation of everything
Raisa, if you read this, please contact me at the email in my profile. I will talk to the moderators and try to get your suspension cancelled.
Sep
18
comment Equation of everything
OK, I'm returning to this question to see if there was any feedback from the poster - and she's been "suspended for low quality contributions", for a year?! What the?? Where can I protest about this?
Sep
18
revised Equation of everything
more on chiral fermions
Sep
18
answered Equation of everything
Sep
13
comment How does entanglement work independent of time?
I have not tried to understand the experiment, but have just skimmed this commentary scienceblogs.com/principles/2012/10/05/… ... The author says yes, it is entanglement swapping. He also says it could be viewed as "a quantum teleportation kind of thing, teleporting a state into the future via a chain of entanglement"... which might be what was discussed at physics.stackexchange.com/questions/3357/…
Sep
9
answered How widespread is the meme “QM is counterintuitive” in academic physics?
Sep
8
comment Does physics address the topic of consciousness?
Schrodinger's point was that quantum mechanics is not a complete theory. And Penrose's physics of consciousness is in no way motivated by the Copenhagen interpretation, it's a type of spontaneous wavefunction collapse theory in which the collapse dynamics is noncomputable and makes it possible for the human brain to evade Godel's theorem. :-)
Sep
4
comment Does string/M-theory address higher-dimensional membrane vibration modes?
So that would be like a string vibrating in less than the critical dimension. But it's also possible that all the nongeometric phases actually are geometric if you find the right variables... There is a lot in string theory that is not yet understood.
Sep
4
comment Does string/M-theory address higher-dimensional membrane vibration modes?
It is possible for string theory, in this 1+1 dimensional form, to have nongeometric phases or nongeometric compactifications (just google those phrases for details), in which not all the worldsheet bosonic degrees of freedom are interpretable as spatial dimensions. So it seems to be possible to have a nongeometric phase in which less than the usual 9+1 dimensions exist as space, e.g. there might just be 3+1 dimensions, and then the remaining 6 bosons are nongeometric...
Sep
4
comment Does string/M-theory address higher-dimensional membrane vibration modes?
@Terry Bollinger... Along with the perspective of strings moving through space, string theory also has the worldsheet perspective, where you have a 1+1 dimensional space which is the interior of the string, and then N bosonic fields on the worldsheet which correspond to the dimensions of the background space in the usual picture, and finally enough fermionic fields to cancel the conformal anomaly on the worldsheet...
Aug
26
asked Baryon masses in Wetterich's new cosmology
Aug
24
comment Does an antiDeSitter space compensate the vacuum energy?
I think I can say this much about the "details" of "H", that it comes from closed-string gravitons coupling to open strings that connect the two parallel antibrane stacks of the scenario. (These "open strings of the gap" would produce SM yukawa couplings by interacting with e.g. other open strings existing at nearby brane-stack intersections; see braneworld models of Ibanez, Marchesano et al.)
Aug
23
revised Does an antiDeSitter space compensate the vacuum energy?
link
Aug
23
answered Does an antiDeSitter space compensate the vacuum energy?
Aug
20
comment Usefulness of SUSY models when it cannot exist at any non-zero temperature
Real-world susy theories don't rely on this effect to break supersymmetry. Real-world susy is supposed to be broken by other effects, e.g. see arxiv.org/abs/hep-th/0509029
Aug
13
comment Newtonian gravity from the holographic principle?
Related: arxiv.org/abs/1308.1977 section 2, "Holography in pseudo-Newtonian gravity"