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.
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页数：4
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