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math.OA2008
Almost commuting unitaries with spectral gap are near commuting unitaries
Tobias J. Osborne
Let M_n be the collection of n x n complex matrices equipped with operator norm. Suppose U, V \in M_n are two unitary matrices, each possessing a gap larger than Δin their spectrum…
quant-ph2008★ 6 cited
Entropic bounds for the quantum marginal problem
Tobias J. Osborne
The quantum marginal problem asks, given a set of reduced quantum states of a multipartite system, whether there exists a joint quantum state consistent with these reduced states.…