Observation of a quantum phase from classical rotation of a single spin

Abstract

The theory of angular momentum connects physical rotations and quantum spins together at a fundamental level. Physical rotation of a quantum system will therefore affect fundamental quantum operations, such as spin rotations in projective Hilbert space, but these effects are subtle and experimentally challenging to observe due to the fragility of quantum coherence. Here we report a measurement of a single-electron-spin phase shift arising directly from physical rotation, without transduction through magnetic fields or ancillary spins. This phase shift is observed by measuring the phase difference between a microwave driving field and a rotating two-level electron spin system, and can accumulate nonlinearly in time. We detect the nonlinear phase using spin-echo interferometry of a single nitrogen-vacancy qubit in a diamond rotating at 200,000rpm. Our measurements demonstrate the fundamental connections between spin, physical rotation and quantum phase, and will be applicable in schemes where the rotational degree of freedom of a quantum system is not fixed, such as spin-based rotation sensors and trapped nanoparticles containing spins.

arXiv commentFive pages, three figures, Supplementary Info

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Cited by in corpus (10)

• Nuclear Spin Gyroscope based on the Nitrogen Vacancy Center in Diamond
• Towards detecting traces of non-contact quantum friction in the corrections of the accumulated geometric phase
• Quantum control and Berry phase of electron spins in rotating levitated diamonds in high vacuum
• Detectable Signature of Quantum Friction on a Sliding Particle in Vacuum
• Quantum control of nuclear spin qubits in a rapidly rotating diamond
• Interplay between geometric and dynamic phases in a single spin system
• Gyroscopically stabilized quantum spin rotors
• Imaging of microwave magnetic field orientation using continuous-wave experiments on nitrogen-vacancy centers in diamond
• Torque-free manipulation of nanoparticle rotations via embedded spins
• Optimising optical tweezers experiments for magnetic resonance sensing with nanodiamonds