Realization of a Λ system with metastable states of a capacitively-shunted fluxonium

N. Earnest, S. Chakram, Y. Lu, N. Irons, R. K. Naik, N. Leung, L. Ocola, D. A. Czaplewski, B. Baker, Jay Lawrence, Jens Koch, D. I. Schuster

Research output: Contribution to journalArticlepeer-review

Abstract

We realize a Λ system in a superconducting circuit, with metastable states exhibiting lifetimes up to 8 ms. We exponentially suppress the tunneling matrix elements involved in spontaneous energy relaxation by creating a “heavy” fluxonium, realized by adding a capacitive shunt to the original circuit design. The device allows for both cavity-assisted and direct fluorescent readout, as well as state preparation schemes akin to optical pumping. Since direct transitions between the metastable states are strongly suppressed, we utilize Raman transitions for coherent manipulation of the states.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Jul 3 2017

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'Realization of a Λ system with metastable states of a capacitively-shunted fluxonium'. Together they form a unique fingerprint.

Cite this