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Optimal spin-entangled electron-hole pair pump.

C W J Beenakker1, M Titov, B Trauzettel

  • 1Instituut-Lorentz, Universiteit Leiden, P.O. Box 9506, 2300 RA Leiden, The Netherlands.

Physical Review Letters
|May 21, 2005
PubMed
Summary
This summary is machine-generated.

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Strong oscillating potentials efficiently create spin-entangled electron-hole pairs. This method generates approximately one Bell pair per two cycles, offering a promising source of entangled flying qubits.

Area of Science:

  • Quantum physics
  • Condensed matter theory

Background:

  • Electron-hole pair creation in Fermi sea is crucial for quantum technologies.
  • Previous studies in the weak potential limit showed limited entanglement production.

Purpose of the Study:

  • To develop a nonperturbative theory for generating spin-entangled electron-hole pairs.
  • To investigate the efficiency of entanglement production using oscillating potentials.

Main Methods:

  • A nonperturbative theoretical framework was employed.
  • Analysis focused on the impact of strong potential oscillations on entanglement generation.

Main Results:

  • A strong oscillating potential can produce, on average, one Bell pair per two cycles.
  • This rate significantly surpasses entanglement production in the weak potential limit.

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Conclusions:

  • Strong potential oscillations offer an efficient mechanism for generating entangled electron-hole pairs.
  • This provides a viable pathway for creating high-quality entangled flying qubits.