Decoherence in circuits of small Josephson junctions - art. no. 172509

Authors
Pekola, JP Toppari, JJ
Citation
Jp. Pekola et Jj. Toppari, Decoherence in circuits of small Josephson junctions - art. no. 172509, PHYS REV B, 6417(17), 2001, pp. 2509
Citations number
28
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6417
Issue
17
Year of publication
2001
Database
ISI
SICI code
0163-1829(20011101)6417:17<2509:DICOSJ>2.0.ZU;2-U
Abstract
We discuss dephasing by the dissipative electromagnetic environment and by measurement in circuits consisting of small Josephson junctions. We present quantitative estimates and determine in which case the circuit might quali fy as a quantum bit. Specifically, we analyze a three junction Cooper pair pump and discuss a measurement to determine the decoherence time tau (phi).