Light squeezing enhancement by coupling nonlinear optical cavities

Area of Science:

• Quantum optics
• Nonlinear optics
• Cavity quantum electrodynamics

Background:

• Coupled optical cavities are fundamental systems for studying light-matter interactions.
• Nonlinear optical materials enable manipulation of light properties within cavities.
• Light squeezing is a key nonclassical phenomenon with applications in quantum technologies.

Purpose of the Study:

• To investigate the squeezing effect in a system of two coupled optical cavities.
• To explore the influence of nonlinear materials and cavity detunings on light squeezing.
• To identify conditions for enhanced light squeezing and its robustness.

Main Methods:

• Theoretical modeling of two coherently pumped coupled optical cavities.
• Inclusion of second-order nonlinear materials within each cavity.
• Analysis of the squeezing parameter as a function of detunings, coupling strength, and dissipation rates.

Main Results:

• Light intensity is significantly enhanced by nonlinearities, dependent on detunings.
• Moderate inter-cavity coupling enhances squeezing, with one cavity amplifying the other's effect.
• Near-resonance conditions yield the highest squeezing; squeezing degrades with large detunings.
• Lower dissipation in the second cavity improves squeezing, approaching near-perfect levels.
• Squeezing exhibits notable resistance to thermal baths for specific parameter choices.

Conclusions:

• The proposed coupled cavity scheme effectively enhances light squeezing.
• Detuning, coupling strength, and dissipation rates are critical parameters for optimizing squeezing.
• The system demonstrates potential for generating robust nonclassical states of light.