Spin-spin correlators in the Majorana representation

被引：47

作者：

Shnirman, A ^{[1
]}

Makhlin, Y

机构：

[1] Univ Karlsruhe, Inst Theoret Festkorperphys, D-76128 Karlsruhe, Germany

[2] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[3] LD Landau Theoret Phys Inst, Moscow 117940, Russia

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.91.207204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In the Majorana representation of a spin 1/2 we find an identity which relates spin-spin correlators to one-particle fermionic correlators. This should be contrasted with the straightforward approach in which two-particle (four-fermion) correlators need to be calculated. We discuss applications to the analysis of the dynamics of a spin coupled to a dissipative environment and of a quantum detector performing a continuous measurement of a qubit's state.

引用

页数：4

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