@article { ISI:000318867100040,
title = {DC SQUID Phase Qubit Coupled to an On-Chip LC Resonator},
journal = {IEEE Transactions on Applied Superconductivity},
volume = {23},
number = {3, 1},
year = {2013},
month = {JUN},
issn = {1051-8223},
doi = {10.1109/TASC.2013.2237876},
author = {R P Budoyo and Benjamin K Cooper and Zaretskey, V. and Ballard, C. J. and Jeffrey R Anderson and Christopher J Lobb and F C Wellstood}
}
@article { ISI:000324386900059,
title = {Decoherence in a pair of long-lived Cooper-pair boxes},
journal = {J. Appl. Phys.},
volume = {114},
number = {9},
year = {2013},
month = {SEP 7},
issn = {0021-8979},
doi = {10.1063/1.4820260},
author = {Zaretskey, V. and S Novikov and B Suri and Kim, Z. and F C Wellstood and B S Palmer}
}
@conference { ISI:000323339700016,
title = {Effective Jaynes-Cummings model from on-chip filter in a dc SQUID phase qubit},
booktitle = {QUANTUM INFORMATION AND COMPUTATION XI},
series = {Proceedings of SPIE},
volume = {8749},
year = {2013},
note = {Conference on Quantum Information and Computation XI, Baltimore, MD, MAY 02-03, 2013},
isbn = {978-0-8194-9540-2},
issn = {0277-786X},
doi = {10.1117/12.2016272},
author = {Cooper, B. K. and Budoyo, R. P. and Zaretskey, V. and Ballard, C. J. and Anderson, J. R. and Lobb, C. J. and Wellstood, F. C.},
editor = {Donkor, E and Pirich, AR and Brandt, HE}
}
@article { ISI:000319618000009,
title = {Spectroscopy of a Cooper-pair box coupled to a two-level system via charge and critical current},
journal = {Phys. Rev. B},
volume = {87},
number = {17},
year = {2013},
month = {MAY 28},
issn = {1098-0121},
doi = {10.1103/PhysRevB.87.174522},
author = {Zaretskey, V. and B Suri and S Novikov and F C Wellstood and B S Palmer}
}
@article {Kim2008,
title = {Anomalous avoided level crossings in a Cooper-pair box spectrum},
journal = {Phys. Rev. B},
volume = {78},
number = {14},
year = {2008},
month = {oct},
abstract = {We have observed a few distinct anomalous avoided level crossings and voltage-dependent transitions in the excited-state spectrum of an Al/AlO(x)/Al Cooper-pair box (CPB). The device was measured at 40 mK in the 15-50 GHz frequency range. We find that a given level crosses the CPB spectrum at two different gate voltages; the frequency and splitting size of the two crossings differ and the splitting size depends on the Josephson energy of the CPB. We show that this behavior is not only consistent with the CPB being coupled to discrete charged "two-level" quantum systems, which move atomic distances in the CPB junctions, but that the spectra provide information about the fluctuators, which is not available from phase qubit spectra of anomalous avoided levels. In particular by fitting a model Hamiltonian to our data, we extract microscopic parameters for each fluctuator, including well asymmetry, tunneling amplitude, and the minimum hopping distance for each fluctuator. The tunneling rates range from less than 3.5-13 GHz, which represent values between 5 and 150\% of the well asymmetry, and the dipole moments give a minimum hopping distance of 0.3-0.8 A. We have also found that these discrete two-level systems have a pronounced effect on the relaxation time (T(1)) of the quantum states of the CPB and hence can be a source of dissipation for superconducting quantum bits.},
keywords = {2008, FLICKER 1/F NOISE, JOSEPHSON-JUNCTIONS, QUBIT, Single Fellow, SINGLE-ELECTRON TRANSISTORS, SMALL TUNNEL-JUNCTIONS},
issn = {1098-0121},
url = {http://prb.aps.org/abstract/PRB/v78/i14/e144506 http://apps.webofknowledge.com/full\_record.do?product=WOS\&search\_mode=GeneralSearch\&qid=2\&SID=3BoaAEpOPA@Jjha4jbH\&page=1\&doc=1},
author = {Kim, Z. and Zaretskey, V. and Yoon, Y. and J F Schneiderman and M D Shaw and P M Echternach and F C Wellstood and B S Palmer}
}