342 reputation
19
bio website
location London, United Kingdom
age 24
visits member for 1 year, 7 months
seen Nov 22 at 1:35

Aug
5
comment Bose Einstein condensates and gravity
The whole point of my answer (which is also the reason why rob's is not relevant) is that 1) the question is not well posed, 2) gravity does of course act on the condensed atoms as they are massive but plays no role in the dynamics of the condensation.
Aug
5
comment Bose Einstein condensates and gravity
Photons do not exert gravitational interaction on each other nor on other objects. If you are referring to the bending of light in General Relativity that is only due to the curvature of spacetime caused by another (massive!) object.
Jul
27
comment Why do objects of a given color appear white under light of that color?
Under red light, a normally "red" object will appear RED...
Jul
12
awarded  Critic
Jul
12
answered Calculate amount of energy based on height of object
Jul
12
comment Applications of physics beyond QFT
I really couldn't say about GR: surely what they are doing at NASA is beyond-textbooks level; unfortunately this one has not seen any experimental realisation yet even though they are designing the first experiments.
Jul
12
comment Applications of physics beyond QFT
Broadly speaking a TFTs (topological field theories) differ from QFTs because while the point of the latter is to calculate expectation values/n-point functions etc ,the former is used to compute topological invariants. For what concerns its experimental realisation you have plenty of experimental results agreeing with the theory, especially in condensed matter systems (Dirac Points in graphene, Anderson localisation, spin liquids, quantum hall...)
Jul
12
revised Existence of negative temperatures and the definition of entropy
added 255 characters in body; added 6 characters in body
Jul
11
comment Existence of negative temperatures and the definition of entropy
Nanite, why do you say a spin inversion experiment cannot be described by a micro canonical nor canonical ensemble??
Jul
11
comment Existence of negative temperatures and the definition of entropy
amlrg-ok for a classical system, but Equipartition theorem does not always hold for quantum systems (when kT is smaller than $\Delta E$).
Jul
11
comment Proof of the conservation of the energy functional for the Gross-Pitaevskii equation?
I think it won't work because the exponential would depend on $|\psi|^2$ as well.
Jul
11
awarded  Citizen Patrol
Jul
11
awarded  Yearling
Jul
10
answered Apparent weight on a hill and in a ditch
Jul
9
comment Proof of the conservation of the energy functional for the Gross-Pitaevskii equation?
Do you know a nice way to show the conservation of $ E$ different from brute force computation?
Jul
9
revised Proof of the conservation of the energy functional for the Gross-Pitaevskii equation?
deleted 18 characters in body; deleted 1 character in body
Jul
9
revised Proof of the conservation of the energy functional for the Gross-Pitaevskii equation?
deleted 10 characters in body; edited body
Jul
9
comment Proof of the conservation of the energy functional for the Gross-Pitaevskii equation?
1) Even if I read that book already I didn't remember that. Thank you. 2) Of course you are right, my mistake; I will amend the question
Jul
9
revised Applications of physics beyond QFT
added 350 characters in body
Jul
9
answered Applications of physics beyond QFT