Reduced and projected two-particle entanglement at finite temperatures.

Peter Samuelsson, I Neder, M Büttiker

Research output: Contribution to journalArticlepeer-review

26 Citations (SciVal)


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
Issue number10
Publication statusPublished - 2009

Subject classification (UKÄ)

  • Condensed Matter Physics


Dive into the research topics of 'Reduced and projected two-particle entanglement at finite temperatures.'. Together they form a unique fingerprint.

Cite this