Quantum electromechanics of a hypersonic crystal

Area of Science:

• Quantum electromechanics
• Optomechanics
• Nanoscale transducers

Background:

• Advances in quantum electromechanics and optomechanics enable sensitive nanoscale mechanical transducers.
• A major challenge is achieving strong motion-electromagnetic field coupling without introducing decoherence.

Purpose of the Study:

• To present a novel electromechanical transducer design.
• To enable quantum-level transduction of hypersonic mechanical motion.
• To reduce decoherence in quantum systems.

Main Methods:

• Integration of a 0.42 GHz hypersonic phononic crystal with a superconducting microwave circuit.
• Utilizing a phononic bandgap crystal for acoustic radiation suppression.

Main Results:

• Demonstrated quantum-level transduction of hypersonic mechanical motion.
• Eliminated decoherence associated with acoustic radiation.
• Achieved strong coupling between mechanical motion and electromagnetic fields.

Conclusions:

• The developed transducer offers a pathway for integrating hypersonic mechanical frequencies with Josephson junction quantum circuits and nanophotonic systems.
• This technology advances quantum computing and quantum information distribution.