Fighting decoherence by feedback-controlled dissipation

  title={Fighting decoherence by feedback-controlled dissipation},
  author={G. Schaller},
  journal={Physical Review A},
  • G. Schaller
  • Published 2012
  • Physics
  • Physical Review A
  • Repeated closed-loop control operations acting as piecewise-constant Liouville superoperators conditioned on the outcomes of regularly performed measurements may effectively be described by a fixed-point iteration for the density matrix. Even when all Liouville superoperators point to the completely mixed state, feedback of the measurement result may lead to a pure state, which can be interpreted as selective dampening of undesired states. Using a microscopic model, we exemplify this for a… CONTINUE READING
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