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Area of Science:

  • Quantum Dynamics
  • Condensed Matter Physics
  • Chemical Physics

Background:

  • Quantum systems in condensed phases exhibit memory effects, known as non-Markovianity.
  • Non-Markovian dynamics are more complex than Markovian (memoryless) dynamics.
  • The precise impact of memory on quantum processes is not well understood.

Purpose of the Study:

  • To rigorously separate non-Markovian contributions from quantum dynamics.
  • To investigate and quantify the influence of memory effects on quantum systems.
  • To explore the potential of non-Markovianity for quantum control applications.

Main Methods:

  • Developed a procedure to map exact non-Markovian quantum propagators to the Lindblad form.
  • Extracted the negative decay rate, a signature of non-Markovianity, from the Lindbladian.
  • Analyzed system properties (coherence, entanglement, equilibrium distribution) by including/excluding the negative decay rate.

Main Results:

  • Successfully mapped non-Markovian dynamics to a Lindblad form.
  • Identified and isolated the negative decay rate as a key indicator of non-Markovianity.
  • Quantified the distinct influence of non-Markovianity on quantum coherence, entanglement, and equilibrium states.

Conclusions:

  • Non-Markovianity significantly influences quantum system properties.
  • The developed method allows for precise analysis of memory effects in quantum dynamics.
  • Leveraging non-Markovianity offers new avenues for quantum control strategies.