Control of mechanical quantum states using diamond spins
Abstract
Abstract: Control of mechanical quantum states using diamond spinsThis project seeks to develop the science and technology of coherent interactions betweensolid-state spins in diamond and the mechanical motion of a high-frequency resonator. As amaterial, diamond contains impurities known as a nitrogen-vacancy centers, which are pointdefects that behave like individual atoms and which can be used as an excellent quantum bit(qubit), even at room temperature. Previously, the research team demonstrated that a highqualitydiamond mechanical resonator can be used to control the quantum state of theseembedded qubits. Under this project, the team will reverse that flow of information: they willuse the atom-scale embedded spin qubits to influence the mechanical state of the resonator.The proposed research has three main parts: first, the team will design and fabricate newdiamond mechanical resonators that operate with very high mechanical frequencies and qualityfactors. These resonators will be much smaller than current designs, which will help tostrengthen the interaction between the resonators and the qubits. Resonators will includediamond mechanical devices that are coupled to light, enabling sensitive optical measurementsof its motion, and mechanical devices with integrated piezoelectric transducers, enablingsensitive electrical detection of its motion at gigahertz frequencies. Second, the team with usethe embedded nitrogen-vacancy center spin qubits to ~cool~ a mechanical mode of a diamondresonator. The qubits will be cooled with a laser, and that cooling mechanism will be transferredto the resonator through their mutual coupling. This is important because it can enable bettersensors and provide new opportunities for quantum information technologies. Third, theresearch team will monitor the mechanical resonator as a new means to measure the state of thenitrogen-vacancy center qubits embedded inside. This is a key challenge because it enables newforms of qubit measurement, and new applications in precision sensing with the qubits. Thisproject will strive to put the nitrogen-vacancy center qubits on and equal footing with amechanical device, which is a key goal that can enable new discoveries in quantum informationscience and enable new technology for quantum-enhanced inertial sensing based navigation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 03, 2017
- Source ID
- N000141712290
Entities
People
- Gregory D Fuchs
Organizations
- Cornell University
- Office of Naval Research
- United States Navy