Coherent Particle Transfer in an On-Demand Single-Electron Source

Jonathan Mark James Keeling, A. V. Shytov, L. S. Levitov

Research output: Contribution to journalArticlepeer-review

99 Citations (Scopus)

Abstract

Electron transfer from a localized state in a quantum dot into a ballistic conductor generally results in particle-hole excitations. We study this effect, considering a resonance level with time-dependent energy coupled to particle states in the Fermi sea. We find that, as the resonance level is driven through the Fermi-level, particle-hole excitations can be suppressed for certain driving protocols. In particular, such noiseless transfer occurs if the level moves with constant rapidity, its energy changing linearly with time. A scheme to study the coherence of particle transfer is proposed.

Original languageEnglish
Article number196404
Number of pages4
JournalPhysical Review Letters
Volume101
Issue number19
DOIs
Publication statusPublished - 7 Nov 2008

Keywords

  • TURNSTILE DEVICE
  • QUANTUM
  • PHOTONS

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