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Environment-governed dynamics in driven quantum systems.

S Gasparinetti1, P Solinas2, S Pugnetti3

  • 1Low Temperature Laboratory (OVLL), Aalto University, P.O. Box 15100, FI-00076 Aalto, Finland.

Physical Review Letters
|August 29, 2014
PubMed
Summary
This summary is machine-generated.

We discovered two regimes in driven quantum systems. The environment, not just the system, can govern dynamics, revealing a new understanding of quantum system behavior.

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Area of Science:

  • Quantum physics
  • Condensed matter physics

Background:

  • Driven quantum systems weakly coupled to an environment typically follow system-governed dynamics.
  • The Hamiltonian of the system and drive usually dictates the relaxation basis.

Purpose of the Study:

  • To identify and characterize distinct dynamical regimes in driven quantum systems.
  • To investigate the conditions under which environmental features dictate system dynamics.

Main Methods:

  • Analysis of a driven quantum system model with weak environmental coupling.
  • Development of an effective coupling parameter to quantify the transition between regimes.

Main Results:

  • Demonstration of two distinct dynamical regimes: system-governed and environment-governed dynamics.
  • Identification of specific environmental features, like the coupling operator form, influencing dynamics.
  • Introduction of an effective coupling parameter to describe the transition.

Conclusions:

  • Quantum system dynamics can be influenced by the environment beyond the system's Hamiltonian.
  • The transition between system-governed and environment-governed dynamics is controllable.
  • Experimental observation of this transition is feasible in systems like superconducting charge pumps.