Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27621
Title: A note on the realignment criterion
Authors: Li, CK
Poon, YT
Sze, NS 
Issue Date: 2011
Publisher: IOP Publishing Ltd
Source: Journal of physics a : mathematical and theoretical, 2011, v. 44, no. 31, 315304 How to cite?
Journal: Journal of Physics A: Mathematical and Theoretical 
Abstract: For a quantum state in a bipartite system represented as a density matrix, researchers used the realignment matrix and functions on its singular values to study the separability of the quantum state. We obtain bounds for elementary symmetric functions of singular values of realignment matrices. This answers some open problems proposed by Lupo, Aniello and Scardicchio. As a consequence, we show that the proposed scheme by these authors for testing separability would not work if the two subsystems of the bipartite system have the same dimension.
URI: http://hdl.handle.net/10397/27621
DOI: 10.1088/1751-8113/44/31/315304
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