Continuous Optical-to-Mechanical Quantum State Transfer in the Unresolved Sideband Regime.

Area of Science:

• Quantum optics
• Optomechanics
• Quantum information science

Background:

• Continuous optical-to-mechanical quantum state transfer is crucial for quantum networks and sensing.
• Existing protocols require stringent conditions like high-quality optical cavities and high mechanical frequencies (resolved sideband regime).

Purpose of the Study:

• To propose a novel continuous quantum state transfer protocol operating in the more accessible unresolved sideband regime.
• To enable quantum state transfer in a wider range of optomechanical systems.
• To facilitate the creation of macroscopic quantum superpositions for fundamental tests.

Main Methods:

• A continuous quantum state transfer protocol based on feedback cooling.
• Operation in the unresolved sideband regime, relaxing requirements on optical cavities and mechanical frequencies.
• Utilizing current technological capabilities for implementation.

Main Results:

• High-fidelity transfer of non-Gaussian quantum states.
• Demonstration of a protocol feasible with existing technology.
• Expansion of applicable optomechanical devices for quantum state transfer.

Conclusions:

• The proposed protocol overcomes limitations of existing methods by operating in the unresolved sideband regime.
• This advancement paves the way for practical quantum technological applications and fundamental quantum science experiments.
• Enables broader use of optomechanical systems for quantum information processing and sensing.