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Proceedings Paper

Effective Jaynes-Cummings model from on-chip filter in a dc SQUID phase qubit
Author(s): B. K. Cooper; R. P. Budoyo; V. Zaretskey; C. J. Ballard; J. R. Anderson; C. J. Lobb; F. C. Wellstood
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Paper Abstract

We examine a dc SQUID phase qubit with an on-chip low-pass resonant LC filter that transforms the line impedance, improving the qubit lifetime. Unusual features in the spectroscopy suggest dynamics more complicated than a simple two-level system. To model this behavior, we consider a lumped-element circuit model of the SQUID that includes the filter as part of the quantum system to be modeled. We show this model reduces to an effective Jaynes-Cummings Hamiltonian, in analogy with circuit QED.

Paper Details

Date Published: 28 May 2013
PDF: 6 pages
Proc. SPIE 8749, Quantum Information and Computation XI, 87490N (28 May 2013); doi: 10.1117/12.2016272
Show Author Affiliations
B. K. Cooper, Joint Quantum Institute, Univ. of Maryland, College Park (United States)
R. P. Budoyo, Joint Quantum Institute, Univ. of Maryland, College Park (United States)
V. Zaretskey, Lab. for Physical Sciences, Univ. of Maryland, College Park (United States)
C. J. Ballard, Joint Quantum Institute, Univ. of Maryland, College Park (United States)
J. R. Anderson, Joint Quantum Institute, Univ. of Maryland, College Park (United States)
C. J. Lobb, Joint Quantum Institute, Univ. of Maryland, College Park (United States)
F. C. Wellstood, Joint Quantum Institute, Univ. of Maryland, College Park (United States)


Published in SPIE Proceedings Vol. 8749:
Quantum Information and Computation XI
Eric Donkor; Andrew R. Pirich; Howard E. Brandt, Editor(s)

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