• Rapid Communication

Noise of entangled electrons: Bunching and antibunching

Guido Burkard, Daniel Loss, and Eugene V. Sukhorukov
Phys. Rev. B 61, R16303(R) – Published 15 June 2000
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Abstract

Addressing the feasibility of quantum communication with entangled electrons in an interacting many-body environment, we propose an interference experiment using a scattering setup with an entangler and a beam splitter. It is shown that, due to electron-electron interaction, the spin correlation of the entangled singlet and triplet states is reduced by zF2 in a conductor described by Fermi liquid theory. We calculate the quasiparticle weight factor zF for a two-dimensional electron system. The current noise for electronic singlet states turns out to be enhanced (bunching behavior), while it is reduced for triplet states (antibunching). Within standard scattering theory, we find that the Fano factor (noise-to-current ratio) for singlets is twice as large as for independent classical particles and is reduced to zero for triplets.

  • Received 11 April 2000

DOI:https://doi.org/10.1103/PhysRevB.61.R16303

©2000 American Physical Society

Authors & Affiliations

Guido Burkard, Daniel Loss, and Eugene V. Sukhorukov

  • Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland

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Issue

Vol. 61, Iss. 24 — 15 June 2000

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