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Measurement-Induced Quantum Synchronization and Multiplexing.

Finn Schmolke1, Eric Lutz1

  • 1Institute for Theoretical Physics I, University of Stuttgart, D-70550 Stuttgart, Germany.

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|January 19, 2024
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Summary
This summary is machine-generated.

Continuous measurement causes quantum many-body systems to spontaneously synchronize. This novel quantum synchronization phenomenon allows control over synchronized states and demonstrates unique nonclassical behavior.

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Area of Science:

  • Quantum Dynamics
  • Many-Body Physics
  • Quantum Information Science

Background:

  • Quantum measurements fundamentally influence quantum system dynamics.
  • Understanding measurement's role in quantum systems is crucial for quantum technologies.

Purpose of the Study:

  • To investigate spontaneous synchronization in continuously measured quantum many-body systems.
  • To establish criteria for measurement-induced quantum synchronization.
  • To explore control over synchronization and its nonclassical properties.

Main Methods:

  • Formulating general criteria for quantum synchronization.
  • Analyzing single trajectories of continuously measured quantum many-body systems.
  • Investigating ergodicity by comparing time and ensemble averages.

Main Results:

  • Demonstrated spontaneous transition from asynchronous dynamics to noise-free synchronization in single trajectories.
  • Showcased control over the number of synchronized realizations (from none to all).
  • Observed broken ergodicity, leading to divergent time and ensemble average behaviors.
  • Introduced quantum multiplexing with distinct synchronization frequencies.

Conclusions:

  • Measurement-induced synchronization is a genuine nonclassical phenomenon.
  • Quantum superpositions are key to achieving this novel form of synchrony.
  • The findings have implications for quantum control and information processing.