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Updated: May 24, 2026

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

Master equations for correlated quantum channels.

V Giovannetti1, G M Palma

  • 1NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, piazza dei Cavalieri 7, I-56126 Pisa, Italy.

Physical Review Letters
|March 10, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces a master equation for subsystems interacting with sequential environments using a collision model. The model generates correlated Markovian evolution, applicable to quantum channels and photon propagation.

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Last Updated: May 24, 2026

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Area of Science:

  • Quantum physics
  • Statistical mechanics
  • Information theory

Background:

  • Understanding the dynamics of open quantum systems is crucial.
  • Previous models often simplified environmental interactions.
  • The need for models capturing memory effects in quantum systems is growing.

Purpose of the Study:

  • To derive a general master equation for sequentially interacting subsystems.
  • To model the reduced time evolution of multipartite systems in structured environments.
  • To investigate the role of environmental correlations in quantum dynamics.

Main Methods:

  • Development of a master equation based on a collision model.
  • Incorporation of irreversible subenvironment dynamics between collisions.
  • Analysis in the weak coupling regime for Markovian evolution.

Main Results:

  • The collision model yields a correlated Markovian evolution for the joint density matrix.
  • The derived Lindblad superoperator includes pairwise cross-correlation terms.
  • The model accurately describes systems with memory and concatenated quantum optical systems.

Conclusions:

  • The proposed master equation provides a versatile framework for open quantum systems.
  • The collision model effectively captures environmental memory effects.
  • This approach has broad applicability in quantum information and optics.