Noise models for superoperators in the chord representation

Details Noise models for superoperators in the chord representation Noise models for superoperators in the chord representation

2004-06-30

arxiv.org/abs/quant-ph/0406236v2

Phys.Rev.A 70, 062301 (2004)

Physics

Quantum Physics

8 pages, 5 .ps figures (RevTeX4). Submitted to Phys. Rev. A. minor changes made, according to referee suggestions

Scientific paper

10.1103/PhysRevA.70.062301

We study many-qubit generalizations of quantum noise channels that can be written as an incoherent sum of translations in phase space. Physical description in terms of the spectral properties of the superoperator and the action in phase space are provided. A very natural description of decoherence leading to a preferred basis is achieved with diffusion along a phase space line. The numerical advantages of using the chord representation are illustrated in the case of coarse-graining noise.

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