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visits member for 3 years, 10 months
seen Nov 30 '13 at 20:06

May
15
comment Is it possible (theoretically) to divide Black Hole into two parts?
Define what you mean by "dividing" a black hole and what do you mean by "parts". Do you want to separate the matter composing the black whole in two? At what distance?
Feb
10
awarded  Yearling
May
31
answered Why are extra dimensions necessary?
Mar
18
answered By what mechanism do quantum effects become observable in normal life at the macroscopic level?
Feb
18
comment Global symmetries in quantum gravity
@Lubos: I'm a bit puzzled by this. How do you know that you can trust a semiclassical calculation all the way to the end of the black hole evaporation? Wouldn't it be possible that in a truly quantum gravity description the black hole actually "knows" that it contains some nonzero $B$ and that at the end of evaporation you get it back?
Feb
15
comment What is “localisation” of instantons?
Thanks Lubos, perfect answer! Now I just need to find the time to read those papers...
Feb
15
accepted What is “localisation” of instantons?
Feb
15
asked What is “localisation” of instantons?
Feb
10
awarded  Teacher
Feb
10
awarded  Scholar
Feb
10
accepted What is wall crossing?
Feb
10
accepted Global symmetries in quantum gravity
Feb
10
comment Global symmetries in quantum gravity
Yes, it's something along these lines that I was looking for, but can you be maybe a bit more precise?
Feb
10
comment How do alpha and beta particles ionise surrounding particles?
@ Jaydon: The energy transferred to the electron comes from the kinetic energy of the ionising particle. The fact that the two can interact come from the fact that they both interact electromagnetically, regardless of the sign of their charge. Notice that in radioactive decay you can also have gamma particles (high energy photons) which aren't charged, but also interact electromagnetically and thus can ionise the medium.
Feb
10
answered How do alpha and beta particles ionise surrounding particles?
Feb
10
awarded  Supporter
Feb
10
asked Global symmetries in quantum gravity
Feb
10
awarded  Student
Feb
10
asked What is wall crossing?