Tanay A. Gosavi

Mechanical spin control of nitrogen-vacancy centers in diamond.

We demonstrate direct coupling between phonons and diamond nitrogen-vacancy (NV) center spins by driving spin transitions with mechanically generated harmonic strain at room temperature. The amplitude of the mechanically driven spin signal varies with the spatial periodicity of the stress standing wave within the diamond substrate, verifying that we drive NV center spins mechanically. These spin-phonon interactions could offer a route to quantum spin control of magnetically forbidden transitions, which would enhance NV-based quantum metrology, grant access to direct transitions between all of the spin-1 quantum states of the NV center, and provide a platform to study spin-phonon interactions at the level of a few interacting spins.

Coherent control of a nitrogen-vacancy center spin ensemble with a diamond mechanical resonator

Coherent control of the nitrogen-vacancy (NV) center in diamonds triplet spin state has traditionally been accomplished with resonant ac magnetic fields under the constraint of the magnetic dipole selection rule, which forbids direct control of the

Continuous dynamical decoupling of a single diamond nitrogen-vacancy center spin with a mechanical resonator

|-1>\leftrightarrow |+1>

Experimental Demonstration of Efficient Spin–Orbit Torque Switching of an MTJ With Sub-100 ns Pulses

spin transition. We show that high-frequency stress resonant with the spin state splitting can coherently control NV center spins within this subspace. Using a bulk-mode mechanical microresonator fabricated from single-crystal diamond, we apply intense ac stress to the diamond substrate and observe mechanically driven Rabi oscillations between the

HBAR as a high frequency high stress generator

|-1>

Model for acoustic locking of Spin Torque Oscillator

and

Magneto Acoustic Spin Hall Oscillators

|+1>

Magneto-acoustic oscillator

states of an NV center spin ensemble. Additionally, we measure the inhomogeneous spin dephasing time (

Cascaded channel-select filter array architecture using high-K transducers for spectrum analysis

T_{2}^{*}

Towards Magneto-Acoustic Oscillators

) of the spin ensemble using a mechanical Ramsey sequence and compare it to the dephasing times measured with a magnetic Ramsey sequence for each of the three spin qubit combinations available within the NV center ground state. These results demonstrate coherent spin driving with a mechanical resonator and could enable the creation of a phase-sensitive