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Unitary Excitation Transfer between Coupled Cavities Using Temporal Switching.
Yarden Mazor1,2, Michele Cotrufo3, Andrea Alù1,3,4
1Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA.
Physical Review Letters
|July 16, 2021
Summary
Abruptly changing the coupling between cavities enables precise control over energy flow, surpassing static limits for efficient excitation transfer. This robust method has broad applications in classical and quantum systems.
Area of Science:
- Physics
- Optics
- Quantum Mechanics
Background:
- Controlling signal flow is crucial for advanced physical phenomena.
- Static coupling scenarios have limitations in energy transfer efficiency.
Purpose of the Study:
- To demonstrate a novel method for tailoring energy flow between coupled cavities.
- To achieve unitary excitation transfer beyond static limitations.
Main Methods:
- Implementing abrupt temporal switching of coupling between two cavities.
- Analyzing energy flow dynamics under dynamic coupling conditions.
Main Results:
- Achieved efficient energy transfer surpassing static limitations.
- Demonstrated unitary excitation transfer through temporal coupling modulation.
- The proposed scheme shows robustness against various nonidealities.
Conclusions:
- Tailored time variations in coupling offer superior control over energy flow.
- This technique has significant implications for classical and quantum technologies, including computing and nanophotonics.
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