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Feedback network models for quantum transport.

John Gough1

  • 1Aberystwyth University, Aberystwyth SY23 3BZ, United Kingdom.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|January 24, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a new network theory for quantum transport systems, extending previous work to include bidirectional fields. The framework accommodates both Bose and Fermi fields and nonlinear dynamics, offering a more comprehensive approach to quantum systems.

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Area of Science:

  • Quantum physics
  • Quantum optics
  • Quantum information theory

Background:

  • Quantum feedback networks provide a system-theoretic approach to open quantum systems in optics.
  • Existing theories often model quantum components as simple scatterers of fields.

Purpose of the Study:

  • To establish a network theory for quantum transport systems with bidirectional mediating fields.
  • To extend the framework of quantum feedback networks to bidirectional transport.

Main Methods:

  • Developing a mathematical framework for quantum feedback networks with paired input-output ports.
  • Adapting the theory to accommodate bidirectional fields, a departure from unidirectional models.

Main Results:

  • The developed theory extends traditional quantum transport approaches by including emission and absorption of field quanta.
  • The theory is applicable to both Bose and Fermi fields and nonlinear dynamics of component systems.
  • A detailed analysis is provided for the case of linear passive quantum components.

Conclusions:

  • The new network theory offers a more versatile and comprehensive framework for analyzing quantum transport systems.
  • This approach broadens the applicability of quantum feedback networks to systems with bidirectional field interactions.