Fast amplification and rephasing of entangled cat states in a qubit-oscillator system

Z. Xiao, T. Fuse, Sahel Ashhab, F. Yoshihara, K. Semba, M. Sasaki, M. Takeoka, J. P. Dowling

Research output: Contribution to journalArticle

Abstract

We study a qubit-oscillator system, with a time-dependent coupling coefficient, and present a fast scheme for generating entangled Schrödinger-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.

Original languageEnglish
Article number013827
JournalPhysical Review A
Volume99
Issue number1
DOIs
Publication statusPublished - 16 Jan 2019

Fingerprint

cats
oscillators
coupling coefficients
nonlinearity
photons

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Xiao, Z., Fuse, T., Ashhab, S., Yoshihara, F., Semba, K., Sasaki, M., ... Dowling, J. P. (2019). Fast amplification and rephasing of entangled cat states in a qubit-oscillator system. Physical Review A, 99(1), [013827]. https://doi.org/10.1103/PhysRevA.99.013827

Fast amplification and rephasing of entangled cat states in a qubit-oscillator system. / Xiao, Z.; Fuse, T.; Ashhab, Sahel; Yoshihara, F.; Semba, K.; Sasaki, M.; Takeoka, M.; Dowling, J. P.

In: Physical Review A, Vol. 99, No. 1, 013827, 16.01.2019.

Research output: Contribution to journalArticle

Xiao, Z, Fuse, T, Ashhab, S, Yoshihara, F, Semba, K, Sasaki, M, Takeoka, M & Dowling, JP 2019, 'Fast amplification and rephasing of entangled cat states in a qubit-oscillator system', Physical Review A, vol. 99, no. 1, 013827. https://doi.org/10.1103/PhysRevA.99.013827
Xiao, Z. ; Fuse, T. ; Ashhab, Sahel ; Yoshihara, F. ; Semba, K. ; Sasaki, M. ; Takeoka, M. ; Dowling, J. P. / Fast amplification and rephasing of entangled cat states in a qubit-oscillator system. In: Physical Review A. 2019 ; Vol. 99, No. 1.
@article{d43635b796aa48b8be16096f8333487e,
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 Sahel Ashhab and F. Yoshihara and K. Semba and M. Sasaki and M. Takeoka and Dowling, {J. P.}",
year = "2019",
month = "1",
day = "16",
doi = "10.1103/PhysRevA.99.013827",
language = "English",
volume = "99",
journal = "Physical Review A - Atomic, Molecular, and Optical Physics",
issn = "1050-2947",
publisher = "American Physical Society",
number = "1",

}

TY - JOUR

T1 - Fast amplification and rephasing of entangled cat states in a qubit-oscillator system

AU - Xiao, Z.

AU - Fuse, T.

AU - Ashhab, Sahel

AU - Yoshihara, F.

AU - Semba, K.

AU - Sasaki, M.

AU - Takeoka, M.

AU - Dowling, J. P.

PY - 2019/1/16

Y1 - 2019/1/16

N2 - We study a qubit-oscillator system, with a time-dependent coupling coefficient, and present a fast scheme for generating entangled Schrödinger-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.

AB - We study a qubit-oscillator system, with a time-dependent coupling coefficient, and present a fast scheme for generating entangled Schrödinger-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.

UR - http://www.scopus.com/inward/record.url?scp=85060176446&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85060176446&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.99.013827

DO - 10.1103/PhysRevA.99.013827

M3 - Article

AN - SCOPUS:85060176446

VL - 99

JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

SN - 1050-2947

IS - 1

M1 - 013827

ER -