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Quantum Transducer Using a Parametric Driven-Dissipative Phase Transition.

Toni L Heugel1, Matteo Biondi1, Oded Zilberberg1

  • 1Institute for Theoretical Physics, ETH Zurich, 8093 Zürich, Switzerland.

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|November 9, 2019
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Summary
This summary is machine-generated.

We discovered a quantum phase transition in Kerr resonators that persists at low photon numbers. This transition enables a new quantum transducer for detecting single-photon amplitudes.

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Area of Science:

  • Quantum optics
  • Nonlinear optics
  • Condensed matter physics

Background:

  • Dissipative Kerr resonators are crucial for quantum information processing.
  • Phase transitions in quantum systems offer unique phenomena and applications.

Purpose of the Study:

  • To investigate dissipative phase transitions in Kerr resonators under detuned drives.
  • To explore the quantum nature of these transitions at low photon numbers.
  • To develop a quantum transducer based on observed phase-switching phenomena.

Main Methods:

  • Theoretical study of a dissipative Kerr resonator with single- and two-photon detuned drives.
  • Analysis of semiclassical and quantum regimes of the phase transition.
  • Characterization of the phase switch and its dependence on drive amplitude.

Main Results:

  • A first-order dissipative phase transition occurs beyond a critical detuning threshold.
  • The transition persists in the quantum limit of low photon numbers.
  • The transition frequency shows a near-linear dependence on the single-photon drive amplitude.

Conclusions:

  • The observed phase transition can be harnessed for sensitive quantum transduction.
  • A quantum transducer is proposed, converting phase transition frequency to single-photon amplitude.
  • The study discusses noise, temperature effects, and a circuit-QED implementation.