Incoherence induced sign change in noise cross-correlations: A case study in the full counting statistics of a pure spin pump

Details Incoherence induced sign change in noise cross-correlations: A case study in the full counting statistics of a pure spin pump Incoherence induced sign change in noise cross-correlations: A case study in the full counting statistics of a pure spin pump

2008-08-27

arxiv.org/abs/0808.3638v2

Physics

Quantum Physics

5 pages, 3 figures, 1 table

Scientific paper

The full counting statistics of a non adiabatic pure spin pump are calculated with particular emphasis on the second and third moments. We show that incoherence can change the sign of spin shot noise cross-correlations from negative to positive, implying entanglement for spin-singlet electronic sources, a truly counterintuitive result. The third moment on the other hand is shown to be much more resilient to incoherence.

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