Finite-temperature Bell test for quasiparticle entanglement in the Fermi sea

Wolf-Ruediger Hannes, M. Titov

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


We demonstrate that the Bell test cannot be realized at finite temperatures in the vast majority of electronic setups proposed previously for quantum entanglement generation. This fundamental difficulty is shown to originate in a finite probability of quasiparticle emission from Fermi-sea detectors. In order to overcome the feedback problem, we suggest a detection strategy, which takes advantage of a resonant coupling to the quasiparticle drains. Unlike other proposals, the designed Bell test provides a possibility to determine the critical temperature for entanglement production in the solid state. © 2008 The American Physical Society.

Original languageEnglish
Article number115323
JournalPhysical Review B: Condensed Matter and Materials Physics
Issue number11
Publication statusPublished - 14 Mar 2008


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