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Cooperative polariton dynamics in feedback-coupled cavities
Bimu Yao1,2, Y S Gui1, J W Rao1
1Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, Canada, R3T 2N2.
Nature Communications
|November 12, 2017
Summary
Feedback cavity architecture enables control over cavity magnon polaritons (CMPs) by increasing Rabi frequency. This advances quantum applications by overcoming harmonic oscillator limitations in cavity spintronics.
Area of Science:
- Quantum physics
- Condensed matter physics
- Cavity spintronics
Background:
- Cavity spintronics uses cavity magnon polaritons (CMPs) from magnon Rabi oscillations.
- Current CMP dynamics are limited by classical harmonic oscillator physics, restricting quantum applications.
Purpose of the Study:
- To break the harmonic-oscillator restriction in CMP dynamics.
- To explore cooperative polariton dynamics in feedback-coupled cavities.
Main Methods:
- Investigated a feedback cavity architecture.
- Varied feedback photon number to observe changes in Rabi frequency and CMP states.
- Developed a theoretical model to explain observed phenomena.
Main Results:
- Demonstrated that feedback photon number increases Rabi frequency.
- Observed the evolution of CMPs to cavity magnon triplets and quintuplets.
- Presented a theory explaining these cooperative polariton dynamics.
Conclusions:
- Feedback cavity architecture overcomes limitations of harmonic oscillator physics in CMPs.
- This research opens new avenues for light-matter interactions in quantum spintronics.
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