Macroscopic quantum coherence in Josephson systems

Citation
B. Ruggiero et al., Macroscopic quantum coherence in Josephson systems, INT J MOD B, 14(25-27), 2000, pp. 3050-3055
Citations number
19
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
ISSN journal
02179792 → ACNP
Volume
14
Issue
25-27
Year of publication
2000
Pages
3050 - 3055
Database
ISI
SICI code
0217-9792(20001030)14:25-27<3050:MQCIJS>2.0.ZU;2-L
Abstract
We present our recent experiments on macroscopic tunneling in the quantum r egime for underdamped Josephson junctions with different classical-quantum crossover temperatures. These experiments are performed towards the observa tion of macroscopic quantum coherence in Josephson systems. A new method to measure coherence in a two-level system based on the adiabatic inversion i n an rf squid, is presented This approach could open new perspectives in vi ew of realization of an elementary quantum bit.