Quantum behavior of underdamped Josephson devices
V. Corato, S. Rombetto, C. Granata, E. Esposito, L. Longobardi, M. Russo, R. Russo, B. Ruggiero, P. Silvestrini
DOI 10.1103/PhysRevB.70.172502 · Physical Review B
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Abstract
We present an experimental characterization of Nb∕AlOx∕Nb Josephson devices in the quantum regime. Josephson junctions and fully integrated Josephson devices consisting of an rf SQUID coupled to a read-out system based on a dc SQUID have been measured. Data on the decay rates from the metastable states show evidence of macroscopic quantum tunneling with a very low dissipation level and a high isolation of the devices from the external environment.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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