Reduced and projected two-particle entanglement at finite temperatures.

Peter Samuelsson, I Neder, M Büttiker

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26 Citations (SciVal)

Abstract

We present a theory for two-particle entanglement production and detection in mesoscopic conductors at finite temperature. The entanglement of the density matrix projected out of the emitted many-body state differs from the entanglement of the reduced density matrix, detectable by current correlation measurements. Under general conditions reduced entanglement constitutes a witness for projected entanglement. Applied to the recent experiment [Neder et al., Nature (London) 448, 333 (2007)10.1038/nature05955] on a fermionic Hanbury Brown Twiss two-particle interferometer we find that despite an appreciable entanglement production in the experiment, the detectable entanglement is close to zero.
Original languageEnglish
Article number106804
JournalPhysical Review Letters
Volume102
Issue number10
DOIs
Publication statusPublished - 2009

Subject classification (UKÄ)

  • Condensed Matter Physics

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