DocumentCode :
1068160
Title :
Increasing Spectroscopic Coherence Times of a DC SQUID Phase Qubit by Operating Deeper in the Potential Well
Author :
Lewis, R.M. ; Dutta, S.K. ; Paik, Hanhee ; Palomaki, T.A. ; Cooper, B.K. ; Przybysz, A.J. ; Dragt, A.J. ; Anderson, J.R. ; Lobb, C.J. ; Wellstood, F.C.
Author_Institution :
Maryland Univ., College Park
Volume :
17
Issue :
2
fYear :
2007
fDate :
6/1/2007 12:00:00 AM
Firstpage :
101
Lastpage :
104
Abstract :
We present measurements of the spectroscopic coherence time, T2* of a Nb-AlOx-Nb dc SQUID phase qubit. T2* is calculated from the spectroscopic width of the |0rang to |1rang transition measured at 25 mK. We find that T2*increases at higher transition frequencies corresponding to measurements deeper in the potential well. The measured are consistent with root mean square current noise saturating at 4 nA.
Keywords :
Josephson effect; SQUIDs; quantum computing; dc SQUID phase qubit; root mean square current noise; spectroscopic coherence time; transition frequency; Capacitance; Critical current; Energy states; Fluctuations; Inductance; Josephson junctions; Phase measurement; Potential well; SQUIDs; Spectroscopy; Decoherence; Josephson junction; noise; phase qubit;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2007.897732
Filename :
4277555
Link To Document :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=1068160
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