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Related Experiment Videos

Quantum effects after decoherence in a quenched phase transition.

N D Antunes1, F C Lombardo, D Monteoliva

  • 1Centre for Theoretical Physics, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|December 12, 2001
PubMed
Summary

Even after classicalization, quantum systems can re-exhibit quantum behavior during quenched phase transitions. This study explores how time-dependent Hamiltonians or bath temperature changes can induce this quantum revival, offering new insights into nonequilibrium quantum dynamics.

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Area of Science:

  • Quantum Mechanics
  • Statistical Physics
  • Nonlinear Dynamics

Background:

  • Quenched phase transitions involve rapid changes in system parameters, leading to complex dynamics.
  • Classicalization describes the process where quantum systems lose their quantum properties and behave classically.
  • Understanding quantum effects in nonequilibrium systems is crucial for fundamental physics and emerging technologies.

Purpose of the Study:

  • To investigate a quantum mechanical toy model exhibiting features of quenched phase transitions.
  • To explore the conditions under which quantum behavior can re-emerge after classicalization.
  • To analyze the role of time-dependent Hamiltonians and bath temperature variations.

Main Methods:

  • Development and analysis of a quantum mechanical toy model.

Related Experiment Videos

  • Application of nonlinear analysis to explain observed phenomena.
  • Numerical simulations of the master equation to validate theoretical predictions.

    • Main Results:

    • Demonstrated that quantum behavior can reappear even after a system has classicalized.
    • Identified time-dependent Hamiltonians and bath temperature changes as triggers for quantum revival.
    • Estimated relevant time scales that align with numerical simulation results.

    Conclusions:

    • Quantum effects can persist or re-emerge in systems undergoing quenched phase transitions, even post-classicalization.
    • This phenomenon offers new avenues for studying quantum dynamics in time-dependent and nonequilibrium scenarios.
    • The findings have implications for understanding quantum behavior in complex systems where decoherence is overcome.