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Coherence and Anticoherence Induced by Thermal Fields.

Lihui Sun1, Ya Liu1, Chen Li1

  • 1Institute of Quantum Optics and Information Photonics, School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, China.

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|May 28, 2022
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Summary
This summary is machine-generated.

This study reveals that coupled bosonic modes can achieve perfect coherence and entanglement. This phenomenon allows for cooling modes to lower temperatures, even with high thermal photon numbers.

Keywords:
anticoherencecoherenceentanglementnonlinear systems

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Area of Science:

  • Quantum optics
  • Many-body physics

Background:

  • Investigating coherence and correlations in multi-mode bosonic systems is crucial for quantum information processing.
  • Parametric coupling and thermal states introduce complex dynamics in quantum systems.

Purpose of the Study:

  • To explore the emergence of coherence and entanglement in a system of parametrically coupled bosonic modes.
  • To investigate the influence of thermal states on these quantum phenomena and their potential for mode cooling.

Main Methods:

  • Theoretical analysis of a system with two bosonic modes coupled to an intermediate mode and external thermal modes.
  • Examination of linear superpositions and their coherence/anticoherence properties.

Main Results:

  • Identified perfect coherence between orthogonal superpositions of bosonic modes.
  • Demonstrated that coherence effects influence population distribution, enabling mode cooling.
  • Showcased entanglement generation between modes, even at high thermal photon numbers.

Conclusions:

  • The studied system exhibits controllable coherence and entanglement, offering a pathway for quantum state manipulation.
  • The system's ability to cool modes to lower temperatures has implications for quantum technologies.
  • Entanglement can be achieved across a broader range of thermal photon numbers than previously expected.