Observation of a phononic Mollow triplet in a hybrid spin-nanomechanical system

Benjamin Pigeau (1) , Sven Rohr (1) , Laure Mercier de Lépinay (1) , Arnaud Gloppe (1) , Vincent Jacques (2) , Olivier Arcizet (1)

1 NEEL - NOF - Nano-Optique et Forces
2 L2C - Laboratoire Charles Coulomb

Reminiscent of the bound character of a qubit's dynamics confined on the Bloch sphere, the observation of a Mollow triplet in the resonantly driven qubit fluorescence spectrum represents one of the founding signatures of Quantum Electrodynamics. Here we report on its observation in a hybrid spin-nanomechanical system, where a Nitro-gen Vacancy spin qubit is magnetically coupled to the vibrations of a Silicon Carbide nanowire. A resonant microwave field turns the originally parametric hybrid interac-tion into a resonant process, where acoustic phonons are now able to induce transitions between the dressed qubit states, leading to synchronized spin-oscillator dynamics. We further explore the vectorial character of the hybrid coupling to the bidimensional de-formations of the nanowire. The demonstrated microwave assisted synchronization of the spin-oscillator dynamics opens novel perspectives for the exploration of spin-dependent forces, the key-ingredient for quantum state transfer.

Domaines: Physique Quantique [quant-ph]

Benjamin Pigeau, Sven Rohr, Laure Mercier de Lépinay, Arnaud Gloppe, Vincent Jacques, et al.. Observation of a phononic Mollow triplet in a hybrid spin-nanomechanical system. Nature Communications, 2015, 6, pp.8603. ⟨10.1038/ncomms9603⟩. ⟨hal-01116693⟩