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location Warsaw, Poland
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seen Feb 19 at 15:20

Graduate student in quantum information (IQC/University of Waterloo).


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Apr
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comment Geometric picture behind quantum expanders
I don't see how is this supposed to help.
Apr
4
asked Geometric picture behind quantum expanders
Mar
29
comment Heuristics for definitions of open and closed quantum dynamics
"a measurement corresponding to an operator X=∑λλPλ is represented by ρ↦∑λPλρPλ" doesn't seem to be correct, i.e. post-measurement result is given by one of $P_{\lambda}\rho P_{\lambda}$ (plus normalization), for $\lambda$ chosen nondeterministically.
Feb
18
comment Constructing a Hamiltonian (as a polynomial of $q_i$ and $p_i$) from its spectrum
Are the coefficients in this polynomial supposed to be real, or integer...? (in the latter case, you only have countably many such polynomials and uncountably many possible spectra) If the coefficients are real, your polynomial would have to somehow encode a subset of $N$ in the coefficients, which might be difficult to do) An interesting question, BTW.
Jan
31
accepted Bell polytopes with nontrivial symmetries
Nov
23
comment Convexity — reference request
I'm not sure what you are asking for. The paper you mention does not use the concept of convexity in any intricate way. Maybe try checking John Watrous' lecture notes on quantum information theory: cs.uwaterloo.ca/~watrous/CS766
Nov
16
comment Possible research implications of proof of John Cardy's a-theorem in QFT
More background?