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seen 20 hours ago

Mar
21
awarded  Citizen Patrol
Oct
23
comment Surface gravity for a rotating charged black hole
Thanks, that's just what I was looking for! (I'll upvote as soon as I can -- not able to right now.)
Oct
23
awarded  Yearling
Oct
23
accepted Surface gravity for a rotating charged black hole
Oct
23
revised Surface gravity for a rotating charged black hole
not actually homework, just personal interest -- in fact I've never taken a class on this, as may be evident from my lack of sophistication
Oct
22
asked Surface gravity for a rotating charged black hole
Jun
20
comment How many qubits are needed for useful computation?
And Seifert says it can be done in $(1+\varepsilon)\log n$ qubits. I don't know the size of the implicit error term but this could lower the threshold to 700 or so.
Jun
20
comment How many qubits are needed for useful computation?
Zalka gives a version of Shor's algorithm requiring only $\lceil 1.5\log n\rceil+2$ qubits, so 1000 qubits is a good threshold for doing useful factoring.
Jun
13
comment Limits of superdense coding
Thank you! I will try to read the papers now.
Jun
13
accepted Limits of superdense coding
Jun
13
comment Limits of superdense coding
Since I'm new to quantum information theory, would you define your terms? In particular, what are A, B, S, and $\rho$? I notice that you never used my N, so would you verify that having N > n entangled qubits does not allow more than 2n bits to be received? (This seems to follow from the no-communication theorem, but I'd like confirmation.)
Jun
12
asked Limits of superdense coding
Oct
22
accepted Why can't a stable star have radius 1 < r < 9/8 its Schwarzschild radius?
Dec
22
accepted Optimality of the CHSH strategy
Dec
10
comment Why can't a stable star have radius 1 < r < 9/8 its Schwarzschild radius?
@dmckee: Perhaps, but 9/8 isn't that close to 3/2, so something else would have to be at work as well.
Dec
10
comment Why can't a stable star have radius 1 < r < 9/8 its Schwarzschild radius?
Can you explain this further? I don't understand why it would collapse at this particular size.
Dec
9
asked Why can't a stable star have radius 1 < r < 9/8 its Schwarzschild radius?
Dec
4
comment Optimality of the CHSH strategy
@PiotrMigdal: I hadn't been able to find the paper online. Thanks for finding it for me! (I looked but found only paywalled versions.) If they do solve this in the paper then this resolves my question; if they don't, I'll edit it to clarify that they do not.
Dec
2
asked Optimality of the CHSH strategy
Mar
28
awarded  Scholar