Noise models for superoperators in the chord representation -: art. no. 062301

被引：15

作者：

Aolita, ML

García-Mata, I

Saraceno, M

机构：

[1] Comis Nacl Energia Atom, Dept Fis, RA-1429 Buenos Aires, DF, Argentina

[2] Univ Nacl San Martin, Escuela Ciencia & Tecnol, Villa Ballester, Argentina

来源：

PHYSICAL REVIEW A | 2004年 / 70卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.70.062301

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study many-qubit generalizations of quantum noise channels that can be written as an incoherent sum of translations in phase space, for which the chord representation results specially useful. Physical descriptions 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.

引用

页码：062301 / 1

页数：9

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