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Characterizing quantum dynamics with initial system-environment correlations.

M Ringbauer1,2, C J Wood3,4, K Modi5

  • 1Centre for Engineered Quantum Systems, School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia.

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|March 21, 2015
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Summary
This summary is machine-generated.

Researchers characterized open quantum systems by measuring a photonic qubit and its environment. New methods quantify initial correlations, enabling optimized quantum experiments.

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Area of Science:

  • Quantum physics
  • Quantum information science
  • Open quantum systems

Background:

  • Understanding open quantum systems is crucial for quantum technologies.
  • Initial correlations between quantum systems and their environments can affect dynamics.
  • Characterizing these correlations is experimentally challenging.

Purpose of the Study:

  • To fully characterize the reduced dynamics of an open quantum system with initial environmental correlations.
  • To develop novel quantitative measures for initial correlation strength.
  • To enable optimization of quantum experiments with respect to their environments.

Main Methods:

  • Utilized a photonic qubit coupled to a simulated environment.
  • Employed quantum state tomography to reconstruct system dynamics.
  • Developed and applied new quantitative measures for initial correlations.

Main Results:

  • Successfully reconstructed a superchannel, a generalized quantum channel, from system-only measurements.
  • Introduced novel quantitative measures to determine the strength of initial system-environment correlations.
  • Demonstrated a method to optimize experiments based on environmental characteristics.

Conclusions:

  • The reduced dynamics of open quantum systems with initial correlations can be fully characterized.
  • Novel quantitative measures provide a powerful tool for analyzing quantum correlations.
  • The developed framework allows for the optimization of quantum experiments for enhanced performance.