Quantum Coherence and Total Phase in Semiconductor Microcavities for Multi-Photon Excitation.

Area of Science:

• Quantum physics
• Semiconductor optics

Background:

• Quantum wells in semiconductor microcavities are crucial for quantum information processing.
• Understanding quantum coherence and phase dynamics is essential for developing quantum technologies.

Purpose of the Study:

• To investigate the influence of weak excitation regimes on quantum coherence and total phase in semiconductor microcavities.
• To analyze how physical parameters affect quantumness measures and fidelity.
• To identify methods for controlling and improving coherence and phase in multi-photon excitation scenarios.

Main Methods:

• Numerical analysis of quantum well dynamics within a semiconductor microcavity.
• Examination of weak excitation regimes and multi-photon excitation.
• Quantification of coherence, total phase, and fidelity based on physical parameters.

Main Results:

• Weak excitation significantly impacts quantum coherence and total phase dynamics.
• Coherence and total phase in multi-photon excitation can be enhanced by controlling field strength, exciton-photon coupling, cavity dissipation, and spontaneous emission rates.
• Fidelity is shown to vary predictably with changes in these physical parameters.

Conclusions:

• The study provides a framework for controlling quantum coherence and phase in semiconductor microcavities.
• Findings have implications for quantum information processing, quantum optics, and fundamental physics.
• Precise control over physical parameters allows for optimization of quantum properties.