Dynamic quantum Kerr effect in circuit quantum electrodynamics

Yin, Y. et al. (2012) Dynamic quantum Kerr effect in circuit quantum electrodynamics. Physical Review A, 85(2), 023826. (doi:10.1103/PhysRevA.85.023826)

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Abstract

A superconducting qubit coupled to a microwave resonator provides a controllable system that enables fundamental studies of light-matter interactions. In the dispersive regime, photons in the resonator exhibit induced frequency and phase shifts which are revealed in the resonator transmission spectrum measured with fixed qubit-resonator detuning. In this static detuning scheme, the phase shift is measured in the far-detuned, linear dispersion regime to avoid measurement-induced demolition of the qubit quantum state. Here we explore the qubit-resonator dispersive interaction over a much broader range of detunings, by using a dynamic procedure where the qubit transition is driven adiabatically. We use resonator Wigner tomography to monitor the interaction, revealing exotic nonlinear effects on different photon states, e.g., Fock states, coherent states, and Schrödinger cat states, thereby demonstrating a quantum Kerr effect in the dynamic framework.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Weides, Professor Martin
Authors: Yin, Y., Wang, H., Mariantoni, M., Bialczak, R. C., Barends, R., Chen, Y., Lenander, M., Lucero, E., Neeley, M., O'Connell, A.D., Sank, D., Weides, M., Wenner, J., Yamamoto, T., Zhao, J., Cleland, A.N., and Martinis, J. M.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Physical Review A
Publisher:American Physical Society
ISSN:1050-2947
ISSN (Online):2469-9934

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