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Quantum-Dot Single-Photon Sources for Entanglement Enhanced Interferometry.

M Müller1, H Vural1, C Schneider2

  • 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Quantum Science and Technology (IQST) and SCoPE, Universität Stuttgart, Allmandring 3, 70569 Stuttgart, Germany.

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|July 12, 2017
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Summary
This summary is machine-generated.

Quantum dots generate two-photon N00N states for superresolving phase measurements. This quantum enhanced precision surpasses the standard quantum limit, paving the way for advanced quantum sensors.

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Area of Science:

  • Quantum optics
  • Quantum metrology
  • Solid-state physics

Background:

  • N00N states are crucial for quantum-enhanced phase determination.
  • Previous N00N state generation methods include spontaneous parametric down-conversion and beam splitters.
  • Existing methods have limitations in precision and scalability.

Purpose of the Study:

  • To demonstrate superresolving phase measurements using two-photon N00N states.
  • To utilize quantum dot single-photon sources for N00N state generation.
  • To explore the application of the Hong-Ou-Mandel effect in quantum metrology.

Main Methods:

  • Generation of two-photon N00N states via quantum dot single-photon sources.
  • Utilizing the Hong-Ou-Mandel effect on a beam splitter for state manipulation.
  • Employing pulsed resonance fluorescence of a charged exciton state for measurement.
  • Postselection techniques for enhanced precision.

Main Results:

  • Achieved quantum-enhanced improvement in phase uncertainty precision.
  • Demonstrated precision exceeding the standard quantum limit.
  • Provided an analytical description of the measurement scheme, considering single-photon emitter constraints.
  • Validated the potential of quantum dots for quantum metrology.

Conclusions:

  • Quantum dot-based N00N states offer a viable path to superresolution in phase measurements.
  • The developed scheme surpasses classical precision limits, showcasing quantum advantage.
  • Results indicate the feasibility of developing practical quantum sensors in the near future.