Coherent optomechanical state transfer between disparate mechanical resonators

Area of Science:

• Quantum physics
• Optomechanics
• Mechanical resonators

Background:

• Coupled mechanical resonators are crucial for quantum information processing.
• Direct coupling requires similar frequencies, limiting control over non-degenerate modes.
• Intermediary optical modes allow interaction and independent control of resonators.

Purpose of the Study:

• To demonstrate coherent optomechanical state swapping between spatially and frequency-separated resonators.
• To show efficient state transfer using two laser beams far detuned from optical cavity resonance.
• To establish a technique applicable for generating quantum entanglement between oscillators.

Main Methods:

• Utilizing an intermediary optical mode within a single optical cavity.
• Employing two laser beams far detuned from the optical cavity resonance.
• Demonstrating state swapping between resonators with a mass ratio of 4.

Main Results:

• Achieved coherent optomechanical state swapping between two resonators with different frequencies and spatial separation.
• Confirmed efficient state transfer is possible using the described laser configuration.
• Established a classical demonstration of a technique with potential for quantum applications.

Conclusions:

• Coherent optomechanical state swapping is feasible between non-degenerate resonators.
• The demonstrated technique offers independent control over coupled mechanical resonators.
• This method provides a pathway for generating entanglement in the quantum regime for quantum information processing.