Spin-spin correlators in Majorana representation

Details Spin-spin correlators in Majorana representation Spin-spin correlators in Majorana representation

2003-05-04

arxiv.org/abs/cond-mat/0305064v1

Phys. Rev. Lett. 91, 207204 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.91.207204

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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