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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Periodic steady regime and interference in a periodically driven quantum system.

Angelo Russomanno1, Alessandro Silva, Giuseppe E Santoro

  • 1SISSA, Via Bonomea 265, I-34136 Trieste, Italy.

Physical Review Letters
|February 2, 2013
PubMed
Summary

Quantum systems driven periodically exhibit time-periodic behavior due to destructive interference. This quantum coherence prevents reaching infinite temperature, even in critical quantum Ising chains.

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Area of Science:

  • Quantum physics
  • Condensed matter physics
  • Many-body systems

Background:

  • Time-periodic driving of quantum systems is a key area of research.
  • Understanding the long-term behavior of driven quantum systems is crucial.

Purpose of the Study:

  • To investigate the coherent dynamics of quantum many-body systems under time-periodic driving.
  • To explore the emergence of time-periodicity in quantum averages.
  • To analyze the behavior of a quantum Ising chain driven across its critical point.

Main Methods:

  • Theoretical analysis of quantum many-body dynamics.
  • Study of time-periodic (Floquet) driving protocols.
  • Investigation of quantum interference effects in time evolution.

Main Results:

  • Destructive interference in time leads to time-periodic quantum averages after an initial transient.
  • Quantum coherence prevents the quantum Ising chain from reaching an infinite temperature state.
  • Floquet resonance effects manifest as peaks or dips in observable frequency dependencies.

Conclusions:

  • Time-periodic driving can induce stable, non-equilibrium states in quantum many-body systems.
  • Quantum coherence plays a vital role in determining the system's ultimate state.
  • The observed phenomena are expected to extend to more complex, nonintegrable systems.