Realization of a $\Lambda$ system with metastable states of a capacitively-shunted fluxonium
Quantum Physics
2018-04-18 v2 Mesoscale and Nanoscale Physics
Abstract
We realize a 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.
Keywords
Cite
@article{arxiv.1707.00656,
title = {Realization of a $\Lambda$ system with metastable states of a capacitively-shunted fluxonium},
author = {Nathan Earnest and Srivatsan Chakram and Yao Lu and Nicholas Irons and Ravi K. Naik and Nelson Leung and Leo Ocola and David A. Czaplewski and Brian Baker and Jay Lawrence and Jens Koch and David I. Schuster},
journal= {arXiv preprint arXiv:1707.00656},
year = {2018}
}
Comments
Total of 10 pages. 5 pages in main tex, and 5 in supplement. Total of 9 figures in entire document