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Non-reciprocal population dynamics in a quantum trimer.

C A Downing1, D Zueco2

  • 1Department of Physics and Astronomy, University of Exeter, Exeter EX4 4QL, UK.

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Summary
This summary is machine-generated.

This study explores quantum trimers with complex coupling phases, revealing how accumulated phase controls non-reciprocal population dynamics and chiral currents in open quantum systems for nanoscale applications.

Keywords:
chiralitynon-reciprocityopen quantum systemstwo-level systems

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Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Open quantum systems

Background:

  • Quantum trimers are systems of three coupled quantum entities.
  • Complex phases in coupling constants introduce non-trivial quantum effects.
  • Open quantum systems account for environmental interactions like loss and gain.

Purpose of the Study:

  • To investigate the role of complex phases in quantum trimer dynamics.
  • To analyze population dynamics and steady states in the presence of gain and loss.
  • To explore the emergence and control of chiral currents in such systems.

Main Methods:

  • Theoretical modeling of a quantum trimer with complex coupling constants.
  • Application of open quantum systems formalism to include dissipation and driving.
  • Analysis of population dynamics and steady-state properties.

Main Results:

  • Mean populations critically depend on the accumulated complex phase.
  • Non-reciprocal behavior observed in population dynamics and steady states for non-trivial phases.
  • Chiral current directionality is primarily governed by the accumulated phase, with potential sign reversals based on gain and coupling strength.

Conclusions:

  • Complex phases in quantum trimers enable controllable non-reciprocal phenomena.
  • The findings pave the way for nanoscale chiral current generation and manipulation.
  • Modulation of phases via magnetic or synthetic fields offers experimental pathways.