Dressed States of Josephson phase qubit coupled to an LC circuit

Author

Wulf, Michael ; Ohki, Thomas A. ; Zhou, Xingxiang ; Feldman, Marc J.

Author_Institution

Dept. of Phys. & Astron., Univ. of Rochester, NY, USA

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

856

Lastpage

859

Abstract

We study the dynamics of a current biased Josephson phase qubit capacitively coupled to an LC circuit. We find that the eigenstates of this system are dressed states that are entangled states between the phase qubit and the LC resonator. We demonstrate that these dressed states can be probed by measuring the avoided crossing in the spectrum of the system. We present our experimental setup to investigate them. This system is interesting not only in demonstrating entanglement, the essential element for quantum information processing (QIP), but also in serving as a first step toward a solid-state analog of cavity QED.

Keywords

Josephson effect; coupled circuits; eigenvalues and eigenfunctions; quantum entanglement; superconducting cavity resonators; superconducting junction devices; superconducting processor circuits; Josephson phase qubit; LC circuit; LC resonator; cavity QED; dressed states; eigenstates; entangled states; quantum information processing; solid-state analog; Atom optics; Coupling circuits; Frequency; Josephson junctions; Optical resonators; Physics; Plasma density; Quantum computing; Quantum entanglement; Solid state circuits; Cavity QED; LC resonator; phase qubit; quantum entanglement;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.850083

Filename

1439773