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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Theory of entangled two-photon emission/absorption [E2P-EA] between molecules.
Tse-Min Chiang1, George C Schatz2
1Graduate Program in Applied Physics, Northwestern University, Evanston, Illinois 60208, USA.
The Journal of Chemical Physics
|August 15, 2023
Summary
This study explores entangled two-photon emission/absorption (E2P-EA) between quantum systems. Quantum interference causes oscillations in E2P-EA rates with entanglement time, showing potential for short-range quantum interactions.
Area of Science:
- Quantum Optics
- Condensed Matter Physics
- Spectroscopy
Background:
- Entangled two-photon emission/absorption (E2P-EA) is a complex quantum phenomenon.
- Understanding E2P-EA mechanisms is crucial for developing quantum technologies.
Purpose of the Study:
- To comprehensively study the theory of E2P-EA between many-level cascade donors and acceptors.
- To analyze the impact of various parameters on the E2P-EA rate.
Main Methods:
- Utilized second-order perturbation theory.
- Investigated donor-acceptor pairs in a homogeneous, dispersive medium.
- Analyzed effects of dipole orientation, radiative lifetime, energy detuning, separation distance, and entanglement time.
Main Results:
- Observed quantum interference effects leading to oscillations in E2P-EA rate with entanglement time.
- Found E2P-EA rates comparable to one-photon emission/absorption (OP-EA) for quantum dots within a few nanometers.
- Demonstrated that E2P-EA rate decreases more rapidly with distance than OP-EA.
Conclusions:
- Quantum interference significantly influences E2P-EA dynamics.
- E2P-EA offers a viable mechanism for short-range quantum interactions, particularly between closely spaced quantum dots.
- The distance dependence of E2P-EA suggests applications in nanoscale quantum systems.
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