Decoherence under many-body system-environment interactions: A stroboscopic representation based on a fictitiously homogenized interaction rate

被引：14

作者：

Alvarez, Gonzalo A. ^{[1
]}

Danieli, Ernesto P. ^{[1
]}

Levstein, Patricia R. ^{[1
]}

Pastawski, Horacio M. ^{[1
]}

机构：

[1] Univ Nacl Cordoba, Fac Matemat Astron & Fis, RA-5000 Cordoba, Argentina

来源：

PHYSICAL REVIEW A | 2007年 / 75卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.75.062116

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An environment interacting with portions of a system leads to multiexponential interaction rates. Within the Keldysh formalism, we fictitiously homogenize the system-environment interaction yielding a uniform decay rate facilitating the evaluation of the propagators. Through an injection procedure we neutralize the fictitious interactions. This technique justifies a stroboscopic representation of the system-environment interaction which is useful for numerical implementation and converges to the natural continuous process. We apply this procedure to a fermionic two-level system and use the Jordan-Wigner transformation to solve a two-spin swapping gate in the presence of a spin environment.

引用

页数：11

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