Spin-Phonon Interfaces in Coupled Nanomechanical Cantilevers.

Area of Science:

• Quantum physics
• Nanotechnology
• Solid-state physics

Background:

• Micro- and nanomechanical oscillators are crucial for quantum technologies.
• Interfacing oscillators with solid-state spins enables coherent quantum hybrid systems at ambient conditions.
• Previous work established oscillators as quantum buses for spin-spin interactions.

Purpose of the Study:

• To experimentally demonstrate coherent coupling of electron/nuclear spins to multiple oscillator modes.
• To investigate mapping mechanical motion to spin polarization.
• To analyze induced spin-spin coupling and estimate entanglement generation.

Main Methods:

• Utilizing a coupled cantilever system for interfacing spins.
• Translating ultralow forces induced by radiation from one oscillator to a distant spin.
• Analyzing coherent spin-spin coupling mediated by common oscillator modes.

Main Results:

• Successful interfacing of spins with common modes of a coupled cantilever system.
• Demonstrated correlation between mechanical motion and spin polarization via force transduction.
• Experimental analysis of coherent spin-spin coupling and estimation of entanglement.

Conclusions:

• This study experimentally validates the coherent coupling of spins to multiple mechanical modes.
• The findings pave the way for novel quantum information processing architectures using hybrid systems.
• The research contributes to advancing long-range quantum entanglement and quantum sensing capabilities.