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Quantum Physics

Title: When quantum channel preserves product states

Abstract: Product states are always considered as the states that don't contain quantum correlation. We discuss here when a quantum channel sends the product states to themselves. The exact forms of such channels are proposed. It is shown that such a quantum channel is a local quantum channel, a composition of a local quantum channel and a flip operation, or such that one of the local states is fixed. Both finite- and infinite-dimensional systems are considered.
Comments: 4 pages
Subjects: Quantum Physics (quant-ph); Mathematical Physics (math-ph)
Journal reference: Reports on Mathematical Physics, 74, 277-282 (2014)
DOI: 10.1016/S0034-4877(14)00025-1
Cite as: arXiv:1409.5994 [quant-ph]
  (or arXiv:1409.5994v1 [quant-ph] for this version)

Submission history

From: Yu Guo [view email]
[v1] Sun, 21 Sep 2014 15:11:04 GMT (7kb)