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seen Oct 3 at 1:04

Oct
12
awarded  Nice Question
Oct
2
asked What is the future of complexity theory in black-hole physics and string theory?
Jul
24
comment About Shor's error correcting algorithm
@LubošMotl So on a generic vector what would the encoding transformation do? Is it just a trivial projection operator?
Jul
21
comment About Shor's error correcting algorithm
@Lubos Motl In 4.2 I am not getting the notation. How is $\vert \bar{c} \rangle$ different from $\vert c_1, c_2, .., c_k, 0..(n-k)...0 \rangle$ ? I am not understanding what does 4.2 mean.
Jul
21
asked About Shor's error correcting algorithm
Jul
13
comment What is the current state of research about the Hayden-Preskill circuit?
@JohnRennie I think you are confusing something - what was closed was an earlier form of the question which had only the first line or two of what is written here - after the moderators closed that question, on my own I deleted that question and then reposted it with the additional details.
Jul
13
asked What is the current state of research about the Hayden-Preskill circuit?
Jul
13
revised About the Hayden-Preskill circuit
added 582 characters in body
Jul
12
revised About the Hayden-Preskill circuit
edited tags
Jul
12
asked About the Hayden-Preskill circuit
Jul
2
awarded  Inquisitive
Jul
2
awarded  Curious
May
31
awarded  Nice Question
Apr
14
comment Is it possible to define a notion of temperature in a microcanonical ensemble?
@V.Moretti Well - the question is - whether this mathematical definition makes physical sense. A system in a microcanonical ensemble is an isolated system which can't exchange energy or particles or volume with anything else. Then how is the system equilibrating to a temperature? Can a system spontaneously determine its temperature without an infinite heat-bath? Isn't this the notion of temperature that leads to freaky things like negative temperature a finite system of spins? [...think of black-hole thermodynamics - isn't that a microcanonical ensemble?...]
Apr
14
comment canonical and microcanonical ensemble
In a microcanonical ensemble isn't it true that all microstates are equally probable and hence the probability distribution is just flat?
Apr
14
asked Is it possible to define a notion of temperature in a microcanonical ensemble?
Apr
11
comment About the recent discovery of tetraquark boundstates
So to make a bound-state colour neutral we would need a notion of "anti-colour" for the anti-quarks - right?
Apr
11
comment About the recent discovery of tetraquark boundstates
So even in a bound-state we can say that the quark and an anti-quark are distinguishable? So problem would start if you had more than 3 quarks in the bound-state?
Apr
11
asked About the recent discovery of tetraquark boundstates
Mar
18
comment What does it mean to “wrap” a D-brane around some manifold?
Bruinner I have been reading that book - anything specific you can point out there - where this is explained? - as to how wrapping happens "on its own"? What is the dynamics of it?