meta user
network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 2 years, 1 month |
| seen | Dec 5 '12 at 23:19 | |
| stats | profile views | 14 |
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Apr 16 |
awarded | Yearling |
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May 4 |
awarded | Yearling |
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May 4 |
awarded | Nice Answer |
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Apr 2 |
answered | States diagonal in the tensor product of Bell states. |
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Feb 24 |
answered | Constructing a CP map with some decaying property |
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Feb 14 |
comment |
What Hermitian operators can be observables? You can impose other superselection rules, typically based on some symmetry, not necessarily the exchange symmetry (that applies only for multi-particle systems). I cannot recommend a reference based on my direct knowledge, but I'd say you might start from rmp.aps.org/abstract/RMP/v79/i2/p555_1 |
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Feb 14 |
comment |
Can the concurrence be calculated in terms of the entanglement of formation? By "does not look as nice as" I actually meant that you cannot write it down as a combination of elementary functions. Even just inverting the binary entropy $-x\log x - (1-x)\log (1-x)$ is not possible in this sense, as far as I know. You can just show that the inverse exists, and maybe calculate some properties, or try to expand it in series, but I believe that's it. |
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Feb 14 |
answered | Can the concurrence be calculated in terms of the entanglement of formation? |
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Feb 13 |
answered | What Hermitian operators can be observables? |
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Jan 26 |
comment |
Do any entanglement measures for mixed states exist that use only single site correlation functions? As Joe says, the local spectrum will still tell you something about entanglement if you have some kind of promise/information about the global purity. For example, if $S(\rho_{AB})<S(\rho_A)$, then the state is $A:B$-entangled |
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Jan 26 |
answered | Do any entanglement measures for mixed states exist that use only single site correlation functions? |
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Sep 29 |
comment |
Does entropy measure extractable work? More recent results here arxiv.org/abs/0908.0424 and here arxiv.org/abs/1009.1630 |
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Sep 29 |
answered | What is the use of a Universal-NOT gate? |
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Apr 16 |
awarded | Teacher |
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Apr 16 |
answered | Are the basic postulates of QM the only set of postulates that can give rise to a sensible semi-probabilistic physical theory? |
