期刊
PHYSICAL REVIEW LETTERS
卷 102, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.106804
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资金
- Swedish VR
- Israeli SF
- MINERVA foundation
- German Israeli Foundation (GIF)
- Project Cooperation (DIP)
- US-Israel Binational SF
- Swiss NSF
- MaNEP
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)] 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.
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