Electron-hole entanglement in a quantum spin Hall insulator

Koji Sato, Mircea Trif, Yaroslav Tserkovnyak

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

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 interedge 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 orbital entanglement in the absence of any correlations and pairing, which is enabled by the helical edge structure of a quantum spin Hall insulator.

Original languageEnglish
Article number115404
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number11
DOIs
Publication statusPublished - 2014 Mar 6

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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