Observation of incoherent relaxation by tunneling in a macroscopic two-state system
- 11 February 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 66 (6), 810-813
- https://doi.org/10.1103/physrevlett.66.810
Abstract
The dynamics of a dissipative, quantized macroscopic two-state system have been experimentally investigated through the measurement of tunneling transitions between the adjacent, equal-energy fluxoid states of a superconducting loop containing Josephson junctions. The tunneling rate Γ has been observed to approach zero as a power law in the temperature, giving a damping parameter α=1.44, in the incoherent relaxation regime. The predicted exponential dependence of Γ on barrier height has been quantitatively confirmed.Keywords
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