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Quantum Foundations

Electron-Hole Entanglement in a Quantum Spin Hall Insulator

arXiv

Authors: Koji Sato, Mircea Trif, Yaroslav Tserkovnyak

Year

2013

Paper ID

33349

Status

Preprint

Abstract Read

~2 min

Abstract Words

110

Citations

N/A

Abstract

We demonstrate that entangled electron-hole pairs can be produced and detected in a quantum spin Hall insulator with a constriction that allows for a weak inter-edge tunneling. A violation of a Bell inequality, which can be constructed in terms of low-frequency nonlocal current-current correlations, serves as a detection of the entanglement. We show that the maximum violation of a Bell inequality can be naturally achieved in this setup, without a need to fine tune tunneling parameters. This may provide a viable route to producing spin entanglement in the absence of any correlations and pairing, where spin-to-charge conversion is enabled by the helical edge structure of a quantum spin Hall insulator.

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We demonstrate that entangled electron-hole pairs can be produced and detected in a quantum spin Hall insulator with a constriction that allows for a weak inter-edge tunneling.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1308.1207 [2] arXiv https://arxiv.org/abs/1308.1207 [3] Publisher https://arxiv.org/abs/1308.1207

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