Minimal Entanglement Witness from Electrical Current Correlations

Fredrik Brange, Ognjen Malkoc, Peter Samuelsson

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

Sammanfattning

Despite great efforts, an unambiguous demonstration of entanglement of mobile electrons in solid state conductors is still lacking. Investigating theoretically a generic entangler-detector setup, we here show that a witness of entanglement between two flying electron qubits can be constructed from only two current cross correlation measurements, for any nonzero detector efficiencies and noncollinear polarization vectors. We find that all entangled pure states, but not all mixed ones, can be detected with only two measurements, except the maximally entangled states, which require three. Moreover, detector settings for optimal entanglement witnessing are presented.
Originalspråkengelska
Artikelnummer036804
TidskriftPhysical Review Letters
Volym118
DOI
StatusPublished - 2017

Ämnesklassifikation (UKÄ)

  • Den kondenserade materiens fysik

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