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10 November 2024
 
  » arxiv » 0710.0348

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Finite-temperature Bell test for quasiparticle entanglement in the Fermi sea
W.-R. Hannes ; M. Titov ;
Date 1 Oct 2007
AbstractWe 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 and of an additional detector cooling. Unlike other proposals the designed Bell test provides a possibility to determine the critical temperature for entanglement production in the solid state.
Source arXiv, 0710.0348
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