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Feedback network models for quantum transport
1Aberystwyth University, Aberystwyth SY23 3BZ, United Kingdom.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|January 24, 2015
Summary
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.
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.
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