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Feedback Control of Quantum Correlations in a Cavity Magnomechanical System with Magnon Squeezing
Mohamed Amazioug1, Shailendra Singh2, Berihu Teklu3,4
1LPTHE-Department of Physics, Faculty of Sciences, Ibnou Zohr University, Agadir 80000, Morocco.
Entropy (Basel, Switzerland)
|October 28, 2023
Summary
We propose a method using coherent feedback and magnon squeezing to enhance quantum correlations in cavity magnomechanics. This approach significantly improves entanglement and explores quantum steering under thermal effects.
Area of Science:
- Quantum physics
- Cavity magnomechanics
- Quantum information science
Background:
- Cavity magnomechanics explores quantum phenomena in coupled magnon-photon systems.
- Improving quantum correlations is crucial for quantum technologies.
- Entanglement and quantum steering are key measures of quantum correlations.
Purpose of the Study:
- To propose a method for enhancing quantum correlations in cavity magnomechanics.
- To investigate the impact of coherent feedback and magnon squeezing on entanglement.
- To study Einstein-Podolsky-Rosen steering under thermal noise and compare entanglement with quantum discord.
Main Methods:
- Utilizing a coherent feedback loop for quantum state manipulation.
- Employing magnon squeezing to enhance quantum correlations.
- Analyzing entanglement and Einstein-Podolsky-Rosen steering in tripartite subsystems.
- Evaluating performance sensitivity to magnon squeezing and thermal effects.
Main Results:
- Significant improvement in entanglement for photon-phonon, photon-magnon, and phonon-magnon subsystems.
- Demonstration of enhanced quantum correlations via coherent feedback.
- Investigation of Einstein-Podolsky-Rosen steering robustness under thermal noise.
- Comparison of entanglement and Gaussian quantum discord in steady and dynamical states.
Conclusions:
- Coherent feedback and magnon squeezing offer an effective strategy to improve quantum correlations in cavity magnomechanics.
- The proposed method enhances entanglement and provides insights into quantum steering under realistic thermal conditions.
- The study contributes to the development of quantum information processing with hybrid quantum systems.
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