Raman Transitions in a Capacitively shunted Fluxonium Circuit
ORAL
Abstract
Superconducting qubits are a promising technology for quantum information processing, but still require improvements in coherence times for fault tolerant quantum computation. One promising path to enhance lifetimes is to engineer a circuit with suppressed transition matrix elements between the qubit states, increasing robustness to environmental noise. We realize this suppression by adding a capacitive shunt to a fluxonium circuit, obtaining lifetimes up to 8\,ms. The reduced transition matrix elements, however, make direct coherent operations a challenge. We overcome this challenge using a three-photon Raman scheme in a $\Lambda$ system realized in the circuit, demonstrating a 500$\times$ decrease in gate times. We will also discuss ongoing research in development of qubits that are protected from both decay and dephasing.
*This work was performed, in part, at the Center for Nanoscale Materials, a U.S. Department of Energy Office of Science User Facility, and supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357. This material is based upon work supported by the Army Research Of
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Presenters
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Nathan Earnest
- Univ of Chicago
- James Franck Institute and Department of Physics, University of Chicago
- James Franck Institute, University of Chicago
- Physics, University of Chicago