Resonance Phenomena in Macroscopic Quantum Tunneling
- 26 Downloads
We consider two types of resonance phenomena in Josephson junctions, both related to the existence of highly resolved levels of a quantum “particle” in a potential well. The existence of the levels is manifested in the most striking way in a resonance decrease of the lifetime of the metastable state under the action of an alternating external current. A strong resonance should take place at the frequency equal to the level spacing. The second type of resonance phenomena takes place at such values of the bias current I x for which two levels in adjacent wells happen to cross. The shape and size of peaks depend strongly on the parameters of the junctions, as well as on the temperature and number of resonance levels.
Unable to display preview. Download preview PDF.
- 1.A. O. Calderia and A. J. Leggett, Phys. Rev. Lett. 46, 211 (1981).Google Scholar
- 2.A. I. Larkin and Yu. N. Ovchinnikov, J. Low Temp. Phys. 63, 315 (1986).Google Scholar
- 3.A. I. Larkin and Yu. N. Ovchinnikov, Zh. Eksp. Teor. Fiz. 91, 318 (1986); Sov. Phys. JETP 64, 185 (1987).Google Scholar
- 5.A. I. Larkin, Yu. N. Ovchinnikov, and A. Schmid, Physica B 152, 266 (1988).Google Scholar
- 6.A. O. Calderia and A. J. Leggett, Phys. Rev. Lett. 46, 211 (1981).Google Scholar
- 7.Yu. N. Ovchinnikov and A. Schmid, Phys. Rev. B 50, 6332 (1994).Google Scholar
- 8.R. Rouse, Siyuan Han, and J. E. Lukens, Phys. Rev. Lett. 75, 1614 (1995).Google Scholar
- 9.P. Silvestini, B. Ruggiers, Yu. N., Ovchinnikov, A. Esposito, and A. Barone, Phys. Lett. A 212, 347 (1996); P. Silvestini, B. Ruggiers, and Yu. N. Ovchinnikov, Phys. Rev. B 54, 1246 (1996).Google Scholar