Semiclassical model for a memory dephasing channel

Details Semiclassical model for a memory dephasing channel Semiclassical model for a memory dephasing channel

2008-10-31

arxiv.org/abs/0810.5716v1

Phys. Scr. T135, 014052 (2009)

Physics

Quantum Physics

8pages, 3 figures, proceedings of CEWQO 2008 Conference

Scientific paper

10.1088/0031-8949/2009/T135/0140

We study a dephasing channel with memory, described by a Hamiltonian model in which the system-environment interaction is described by a stochastic process. We propose a useful way to describe the channel uses correlations. Moreover, we give a general expression for the coherences decay factors as a function of the number of channel uses and of the stochastic process power spectrum. We also study the impact of memory on the three qubit code, showing that correlations among channel uses affect very little the code performance.

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