公开(公告)号：US11585870B2

公开(公告)日：2023-02-21

申请号：US17376234

申请日：2021-07-15

Applicant: Massachusetts Institute of Technology

Inventor： Laura Kim ,  Hyeongrak Choi ,  Matthew Edwin Trusheim ,  Dirk Robert Englund

IPC: G01R33/032 ,  G01R29/08

Abstract: Nitrogen vacancy (NV) centers in diamond combine exceptional sensitivity with nanoscale spatial resolution by optically detected magnetic resonance (ODMR). Infrared (IR)-absorption-based readout of the NV singlet state transition can increase ODMR contrast and collection efficiency. Here, a resonant diamond metallodielectric metasurface amplifies IR absorption by concentrating the optical field near the diamond surface. This plasmonic quantum sensing metasurface (PQSM) supports plasmonic surface lattice resonances and balances field localization and sensing volume to optimize spin readout sensitivity. Combined electromagnetic and rate-equation modeling suggests a near-spin-projection-noise-limited sensitivity below 1 nT Hz−1/2 per μm2 of sensing area using numbers for contemporary NV diamond samples and fabrication techniques. The PQSM enables microscopic ODMR sensing with IR readout near the spin-projection-noise-limited sensitivity, making it appealing for imaging through scattering tissues and spatially resolved chemical NMR detection.

公开(公告)号：US11586152B2

公开(公告)日：2023-02-21

申请号：US17504238

申请日：2021-10-18

Applicant: Massachusetts Institute of Technology

Inventor： Matthew Edwin Trusheim ,  Kurt Jacobs ,  Jonathan Hoffman ,  Donald Fahey ,  Dirk Robert Englund

IPC: G04F5/14 ,  H03L7/26

Abstract: An ensemble of spin defect centers or other atom-like quantum systems in a solid-state host can be used as a compact alternative for an atomic clock thanks to an architecture that overcomes magnetic and temperature-induced systematics. A polariton-stabilized solid-state spin clock hybridizes a microwave resonator with a magnetic-field-insensitive spin transition within the ground state of a spin defect center (e.g., a nitrogen vacancy center in diamond). Detailed numerical and analytical modeling of this polariton-stabilized solid-state spin clock indicates a potential fractional frequency instability below 10−13 over a 1-second measurement time, assuming present-day experimental parameters. This stability is a significant improvement over the state-of-the-art in miniaturized atomic vapor clocks.

公开(公告)号：US11522117B2

公开(公告)日：2022-12-06

申请号：US17151763

申请日：2021-01-19

Applicant: Massachusetts Institute of Technology

Inventor： Dirk Robert Englund ,  Matthew Edwin Trusheim ,  Matt Eichenfield ,  Tomas Neuman ,  Prineha Narang

IPC: G06N10/00 ,  H01L39/22 ,  G06N10/40 ,  H01L27/18 ,  H01L27/20

Abstract: A hybrid quantum system performs high-fidelity quantum state transduction between a superconducting (SC) microwave qubit and the ground state spin system of a solid-state artificial atom. This transduction is mediated via an acoustic bus connected by piezoelectric transducers to the SC microwave qubit. For SC circuit qubits and diamond silicon vacancy centers in an optimized phononic cavity, the system can achieve quantum state transduction with fidelity exceeding 99% at a MHz-scale bandwidth. By combining the complementary strengths of SC circuit quantum computing and artificial atoms, the hybrid quantum system provides high-fidelity qubit gates with long-lived quantum memory, high-fidelity measurement, large qubit number, reconfigurable qubit connectivity, and high-fidelity state and gate teleportation through optical quantum networks.