@article{3a5ca595698f43c09625fa6255c511a2,
title = "Fast amplification and rephasing of entangled cat states in a qubit-oscillator system",
abstract = "We study a qubit-oscillator system, with a time-dependent coupling coefficient, and present a fast scheme for generating entangled Schr{\"o}dinger-cat states with large mean photon numbers and also a scheme that protects the cat states against dephasing caused by the nonlinearity in the system. We focus on the case where the qubit frequency is small compared to the oscillator frequency. We first present the exact quantum state evolution in the limit of infinitesimal qubit frequency. We then analyze the first-order effect of the nonzero qubit frequency. Our scheme works for a wide range of coupling strength values, including the recently achieved deep-strong-coupling regime.",
author = "Z. Xiao and T. Fuse and S. Ashhab and F. Yoshihara and K. Semba and M. Sasaki and M. Takeoka and Dowling, {J. P.}",
note = "Funding Information: T.F., F.Y., K.S., M.S., and M.T. would like to acknowledge support from Japan Science and Technology Agency Core Research for Evolutionary Science and Technology (Grant No. JPMJCR1775). Z.X and J.P.D. would like to acknowledge AFOSR, ARO, DARPA, NSF, and NGAS. Funding Information: T.F., F.Y., K.S., M.S., and M.T. would like to acknowledge support from Japan Science and Technology Agency Core Research for Evolutionary Science and Technology (Grant No. JPMJCR1775). Z.X and J.P.D. would like to acknowledge AFOSR, ARO, DARPA, NSF, and NGAS. Publisher Copyright: {\textcopyright} 2019 American Physical Society.",
year = "2019",
month = jan,
day = "16",
doi = "10.1103/PhysRevA.99.013827",
language = "English",
volume = "99",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "1",
}