Research output: Contribution to journal › Article › peer-review
On Weyl channels being covariant with respect to the maximum commutative group of unitaries. / Amosov, Grigori G.
In: Journal of Mathematical Physics, Vol. 48, No. 1, 012104, 08.04.2007.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - On Weyl channels being covariant with respect to the maximum commutative group of unitaries
AU - Amosov, Grigori G.
PY - 2007/4/8
Y1 - 2007/4/8
N2 - We investigate the Weyl channels being covariant with respect to the maximum commutative group of unitary operators. This class includes the quantum depolarizing channel and the "two-Pauli" channel as well. Then, we show that our estimation of the output entropy for a tensor product of the phase damping channel and the identity channel based upon the decreasing property of the relative entropy allows to prove the additivity conjecture for the minimal output entropy for the quantum depolarizing channel in any prime dimension and for the two-Pauli channel in the qubit case.
AB - We investigate the Weyl channels being covariant with respect to the maximum commutative group of unitary operators. This class includes the quantum depolarizing channel and the "two-Pauli" channel as well. Then, we show that our estimation of the output entropy for a tensor product of the phase damping channel and the identity channel based upon the decreasing property of the relative entropy allows to prove the additivity conjecture for the minimal output entropy for the quantum depolarizing channel in any prime dimension and for the two-Pauli channel in the qubit case.
UR - http://www.scopus.com/inward/record.url?scp=34047164384&partnerID=8YFLogxK
U2 - 10.1063/1.2406054
DO - 10.1063/1.2406054
M3 - Article
AN - SCOPUS:34047164384
VL - 48
JO - Journal of Mathematical Physics
JF - Journal of Mathematical Physics
SN - 0022-2488
IS - 1
M1 - 012104
ER -
ID: 41888785