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Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Long-lasting exponential spreading in periodically driven quantum systems.

Jiao Wang1, Italo Guarneri, Giulio Casati

  • 1Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005, China.

Physical Review Letters
|December 21, 2011
PubMed
Summary
This summary is machine-generated.

Long-lasting exponential spreading of wave packets in momentum space is achievable in cold-atom experiments. A pseudoclassical map explains these findings, with potential applications discussed.

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Area of Science:

  • Atomic, Molecular & Optical Physics
  • Quantum Dynamics
  • Condensed Matter Physics

Background:

  • Wave packet spreading is a fundamental quantum phenomenon.
  • Understanding spreading dynamics is crucial for quantum simulations and information processing.
  • Cold-atom experiments offer a controllable platform for studying quantum dynamics.

Purpose of the Study:

  • To investigate the possibility of long-lasting exponential wave packet spreading in momentum space.
  • To provide a theoretical explanation for observed spreading dynamics.
  • To explore potential applications of this phenomenon.

Main Methods:

  • Development of a dynamical model tailored for cold-atom experiments.
  • Numerical simulations to observe wave packet evolution.
  • Analysis using a pseudoclassical map for qualitative and quantitative explanations.

Main Results:

  • Demonstration of long-lasting exponential spreading of wave packets in momentum space.
  • Successful qualitative and quantitative explanation of numerical results via the pseudoclassical map.
  • Identification of potential applications stemming from the observed spreading dynamics.

Conclusions:

  • Long-lasting exponential wave packet spreading is feasible in cold-atom systems.
  • The pseudoclassical map provides a powerful tool for understanding this quantum dynamics.
  • The findings open avenues for novel applications in quantum technologies.