Decoherence-free subspaces and subsystems for a collectively depolarizing bosonic channel

被引：7

作者：

Ball, JL ^{[1
]}

Banaszek, K ^{[1
]}

机构：

[1] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England

来源：

OPEN SYSTEMS & INFORMATION DYNAMICS | 2005年 / 12卷 / 02期

关键词：

D O I：

10.1007/s11080-005-5723-1

中图分类号：

O29 [应用数学];

学科分类号：

070104 ;

摘要：

We discuss the structure of decoherence-free subsystems for a bosonic channel affected by collective depolarization. A single use of the channel is defined as a transmission of a pair of bosonic modes. Collective depolarization consists in a random linear U(2) transformation of the respective mode operators, which is assumed to be identical for N consecutive uses of the channel. We derive a recursion formula that characterizes the dimensionality of available decoherence-free subsystems in such a setting.

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页码：121 / 131

页数：11

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