TY - JOUR

T1 - Estimating the output entropy of a tensor product of two quantum channels

AU - Amosov, G. G.

PY - 2015/3/1

Y1 - 2015/3/1

N2 - For a class of bipartite quantum states, we find a nontrivial lower bound on the entropy gain resulting from the action of a tensor product of the identity channel with an arbitrary channel. We use the obtained result to bound the output entropy of the tensor product of a dephasing channel with an arbitrary channel from below. We characterize phase-damping channels that are particular cases of dephasing channels.

AB - For a class of bipartite quantum states, we find a nontrivial lower bound on the entropy gain resulting from the action of a tensor product of the identity channel with an arbitrary channel. We use the obtained result to bound the output entropy of the tensor product of a dephasing channel with an arbitrary channel from below. We characterize phase-damping channels that are particular cases of dephasing channels.

KW - Bipartite quantum system

KW - Entanglement

KW - Quantum channel

KW - Von Neumann entropy

UR - http://www.scopus.com/inward/record.url?scp=84927169410&partnerID=8YFLogxK

U2 - 10.1007/s11232-015-0270-6

DO - 10.1007/s11232-015-0270-6

M3 - Article

AN - SCOPUS:84927169410

VL - 182

SP - 397

EP - 406

JO - Theoretical and Mathematical Physics (Russian Federation)

JF - Theoretical and Mathematical Physics (Russian Federation)

SN - 0040-5779

IS - 3

ER -