Harvard College

Massachusetts Institute of Technology

National Tech. & Eng. Solutions of Sandia, LLC

Tomas Neuman

Prineha Narang

Dirk Robert Englund

Matt Eichenfield

Matthew Edwin Trusheim

Derek S Wang

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.

Phononic bus for coherent interfaces between a superconducting quantum processor, spin memory, and photonic quantum networks

Devices comprising dipole-coupled defects for use as entangled photon pair sources are provided.

Dipole-coupled defects as entangled photon pair sources

Growing community of inventors

Cambridge, MA, United States of America

Tomas Neuman