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Effect of magnetic field on macroscopic quantum tunneling escape time in small Josephson junctions (Articolo in rivista)
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- Label
- Effect of magnetic field on macroscopic quantum tunneling escape time in small Josephson junctions (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Alternative label
Ovchinnikov, YN; Barone, A; Varlamov, AA (2008)
Effect of magnetic field on macroscopic quantum tunneling escape time in small Josephson junctions
(literal)
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- Ovchinnikov, YN; Barone, A; Varlamov, AA (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- \"[Ovchinnikov, Yu. N.] Max Plank Inst Phys Complex Syst, D-01187 Dresden, Germany; [Ovchinnikov, Yu. N.] Russian Acad Sci, LD Landau Theoret Phys Inst, Chernogolovka 142432, Russia; [Barone, A.] Univ Naples Federico 2, Dipartimento Sci Fis, I-80125 Naples, Italy; [Barone, A.] CNR, Coherentia INFM, I-80125 Naples, Italy; [Varlamov, A. A.] CNR, Coherentia INFM, I-00133 Rome, Italy (literal)
- Titolo
- Effect of magnetic field on macroscopic quantum tunneling escape time in small Josephson junctions (literal)
- Abstract
- We study the phenomenon of macroscopic quantum tunneling (MQT) in a finite-size Josephson junction (JJ) with an externally applied magnetic field. As is well known, the problem of MQT in a pointlike JJ is reduced to the study of the under-barrier motion of a quantum particle in the washboard potential. In the case of a finite-size JJ placed in magnetic field, this problem is considerably more complex since, besides the phase, the potential itself depends on space variables. We find the general expressions both for the crossover temperature To between thermally activated and MQT regimes and the escape time tau(esc). It turns out that in the proximity of particular values of magnetic field, the crossover temperature can vary nonmonotonically. (literal)
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