title: Observation of a phononic Mollow triplet in a multimode hybrid spin-nanomechanical system.
abstract: 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 nitrogen-vacancy spin qubit is magnetically coupled to the vibrations of a silicon carbide nanowire. A resonant microwave field turns the originally parametric hybrid interaction 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 deformations 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.
authors.affiliation: Institut Néel, CNRS et Université Grenoble Alpes, 38042 Grenoble, France.
authors.forename: B
authors.initials: B
authors.lastname: Pigeau
authors.affiliation: Institut Néel, CNRS et Université Grenoble Alpes, 38042 Grenoble, France.
authors.forename: S
authors.initials: S
authors.lastname: Rohr
authors.affiliation: Institut Néel, CNRS et Université Grenoble Alpes, 38042 Grenoble, France.
authors.forename: L
authors.initials: L
authors.lastname: Mercier de Lépinay
authors.affiliation: Institut Néel, CNRS et Université Grenoble Alpes, 38042 Grenoble, France.
authors.forename: A
authors.initials: A
authors.lastname: Gloppe
authors.affiliation: Laboratoire Charles Coulomb, Université de Montpellier and CNRS, 34095 Montpellier, France.
authors.forename: V
authors.initials: V
authors.lastname: Jacques
authors.affiliation: Institut Néel, CNRS et Université Grenoble Alpes, 38042 Grenoble, France.
authors.forename: O
authors.initials: O
authors.lastname: Arcizet