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Emission of time-bin entangled particles into helical edge states

  • Patrick P. Hofer
  • Markus Büttiker
Publishing year: 2013-12-30
Language: English
Publication/Series: Physical Review B - Condensed Matter and Materials Physics
Volume: 88
Issue: 24
Document type: Journal article
Publisher: American Physical Society

Abstract english

We propose a single-particle source which emits into the helical edge states of a two-dimensional quantum spin Hall insulator. Without breaking time-reversal symmetry, this source acts like a pair of noiseless single-electron emitters which each inject separately into a chiral edge state. By locally breaking time-reversal symmetry, the source becomes a proper single-particle emitter which exhibits shot noise. Due to its intrinsic helicity, this system can be used to produce time-bin entangled pairs of electrons in a controlled manner. The noise created by the source contains information on the emitted wave packets and is proportional to the concurrence of the emitted state.


  • ISSN: 1098-0121
Portrait of Patrick Potts
E-mail: patrick [dot] potts [at] teorfys [dot] lu [dot] se

Postdoctoral fellow

Mathematical Physics


Postdoctoral fellow