genneth

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bio	website	tcm.phy.cam.ac.uk/~gz218
	location	Cambridge, United Kingdom
	age	26
visits	member for	2 years, 5 months
	seen	May 11 at 15:40
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	4,074 reputation	bio	website	tcm.phy.cam.ac.uk/~gz218	visits	member for	2 years, 5 months
721 badges		location	Cambridge, United Kingdom		seen	May 11 at 15:40

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Apr 29	awarded	Nice Answer
Feb 20	awarded	Nice Answer
Jan 21	awarded	Yearling
Jan 7	awarded	Good Answer
Nov 6	comment	An explanation for the Landauer's principle The Wikipedia article linked in the question seems to be full of references...
Nov 3	answered	How much space to simulate a small Hilbert space?
Oct 31	comment	Could someone introduce books or reviews on electron-electron interaction to me? Hmm... seems a bit broad of a question? An answer might be "any chemistry textbook"?
Oct 30	comment	Why is electric field strong at sharp edges? Roughly, the surfaces you have in mind are equipotentials and electric fields are the derivatives.
Oct 29	comment	Formal demonstration that minimizing the free energy equals maximizing the entropy @NickKidman: in light of the comment, I withdraw my objections. :-)
Oct 29	comment	Formal demonstration that minimizing the free energy equals maximizing the entropy @MyWaytoCMT: think-o; I mean minimize free energy.
Oct 29	comment	Formal demonstration that minimizing the free energy equals maximizing the entropy This is just false. There is a mathematically derivation of the canonical ensemble which follows from just minimising the entropy. You can then consider a full system+bath, and maximise the entropy of the whole universe, and show that this is equivalent to maximising the free energy of the system. Nothing is circular.
Oct 25	answered	Limits of superfluidity
Oct 22	comment	Can Ohm's law break in metals? As a theoretical consideration, recall that Ohm's law fundamentally occurs because of a balance between relaxation and driving EMF. Thus unless there is a dependence between the relaxation mechanism and the driving EMF, the relationship will be linear. I can't think of anything related to electric fields that fundamentally changes, but perhaps it is possible to generate enough magnetic field to get magneto-resistance effects? That might be where the 1 percent prediction comes from.
Oct 21	comment	Edge channels in Quantum Hall effect I think the reason this has gotten no response is because it's unclear what the OP already knows. It seems like if the OP knows words like "edge channels" then they should know the answer already...?
Oct 21	comment	Does entropy decrease through measurement? The second law is a statement about closed systems. You have neglected to account for the entropy change in the measurement equipment.
Oct 16	comment	Entanglement Entropy By the way, if you are a student, just keep following your taught courses --- entanglement entropy in condensed matter is an active area of research, so there simply are not easy to read papers for outsiders of the field yet --- partly because no one wants to take the time to write one, and partly because no one is sure what such a paper might look like.
Oct 16	comment	Entanglement Entropy The idea of using entanglement entropy in condensed matter arose as it became apparent that we needed tools to directly understand the many-body phenomenon not approachable by the usual methods of reducing it to a single-particle problem (even things like BCS are essentially single-particle; much of our current understanding is about justifying the places for which this is reasonable). So yes; to truly understand its use in condensed matter, you need to have a very good appreciation already of the truly complex problems it's trying to solve.
Oct 16	answered	How robust is Kramers degeneracy in real material?
Oct 16	comment	Entanglement Entropy But condensed matter is all about many body problems...?
Oct 15	comment	Confusion about Free Energy and the Hamiltonian As long as temperature is the only relevant macroscopic variable (which you check by experiment!), then yes.