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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Spectral phase transitions in optical parametric oscillators.

Arkadev Roy1, Saman Jahani1, Carsten Langrock2

  • 1Department of Electrical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA.

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|February 6, 2021
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Summary
This summary is machine-generated.

Optical parametric oscillators (OPOs) exhibit spectral phase transitions between degenerate and non-degenerate states, crucial for nonlinear dynamics. This discovery enables new applications in sensing and quantum information processing.

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Area of Science:

  • Nonlinear optics
  • Quantum optics
  • Condensed matter physics

Background:

  • Driven nonlinear resonators exhibit complex phenomena beyond linear systems.
  • Phase transitions far from equilibrium offer unique opportunities.
  • Optical parametric oscillators (OPOs) are key nonlinear systems.

Purpose of the Study:

  • To demonstrate spectral phase transitions in optical parametric oscillators (OPOs).
  • To analyze the behavior of OPOs around critical points.
  • To explore potential applications of these non-equilibrium phenomena.

Main Methods:

  • Experimental demonstration of a second-order spectral phase transition in a quadratic OPO.
  • Analysis of spectral response and susceptibility near the critical point.
  • Theoretical prediction of first-order phase transitions in coupled OPOs.

Main Results:

  • OPOs undergo second-order phase transitions in the spectral domain.
  • The transition exhibits a square-root dependence and high sensitivity, similar to exceptional points.
  • Spontaneous symmetry breaking and distinct phase noise properties were observed.

Conclusions:

  • Non-equilibrium spectral phase transitions in OPOs are experimentally verified.
  • These transitions are governed by nonlinear dynamics beyond simple bifurcation.
  • The findings have implications for enhanced sensing, computing, and quantum information processing.