Robust optomechanical state transfer under composite phase driving.

Area of Science:

• Quantum optics
• Optomechanics
• Quantum control

Background:

• Optomechanical systems enable the study of quantum phenomena at macroscopic scales.
• State transfer is crucial for quantum information processing and sensing.
• Achieving robust state transfer in lossy systems remains a significant challenge.

Purpose of the Study:

• To develop a robust technique for optomechanical state transfer.
• To enhance excitation exchange efficiency in lossy optomechanical systems.
• To maintain system stability near its steady state during transfer.

Main Methods:

• Utilizing phase-tailored composite pulse driving with constant amplitude.
• Drawing inspiration from coherent control techniques in quantum bit (qubit) systems.
• Identifying optimal phases for robust excitation exchange in lossy, strongly-driven systems.

Main Results:

• Demonstrated existence of optimal phases for maximally robust excitation exchange.
• Showcased protection against random parameter variations in the optomechanical system.
• Developed smooth pulse sequences that preserve steady-state proximity while optimizing transfer robustness.

Conclusions:

• Phase-tailored composite pulse driving offers a robust solution for optomechanical state transfer.
• The proposed method balances robustness with system stability, crucial for practical applications.
• This technique advances the control capabilities in quantum optomechanical systems.