Advertisement

Journal of Superconductivity

, Volume 5, Issue 5, pp 481–484 | Cite as

Resonant macroscopic quantum tunneling in Josephson junctions

  • Yu. N. Ovchinnikov
  • P. Silvestrini
  • B. Ruggiero
  • A. Barone
Article

Abstract

Many theoretical studies and some experiments have shown the possibility of several new secondary quantum effects in small Josephson junctions at low temperatures. We show that, within the well-established quantum picture of the junction, it is possible to experimentally observe sharp voltalge peaks at certain current values. Such peaks are related to a resonant macroscopic quantum tunneling between levels in neighboring wells of the proper washboard potential having close energies. The proposed experiment, with respect to experiments on Coulomb blockade or Block oscillations, requires a larger junction area, reducing the technological difficulties in making the samples.

Key words

Josephson junctions macroscopic quantum tunneling Coulomb blockade 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    A. D. Caldeira and A. J. Leggett,Phys. Rev. Lett. 46, 211 (1981); A. D. Caldeira and A. J. Leggett,Ann. Phys. 149, 374 (1983); Antony J. Leggett,Direction in Condensed Matter Physics, Vol. 1, G. Grinstein and G. Mazenko, eds. (World Scientific, Singapore, 1986), p. 187 and references therein.Google Scholar
  2. 2.
    R. F. Voss and R. A. Webb,Phys. Rev. Lett. 47, 265 (1981); L. D. Jackel, J. P. Gordon, E. L. Hu, R. E. Howard, L. A. Fetter, D. M. Tennant, R. W. Epworth, and J. Kurkijarvi,Phys. Rev. Lett. 47, 697 (1981); S. Washburn, R. F. Voss, R. A. Webb, and S. Faris,Phys. Rev. Lett. 54, 2712 (1985); M. H. Devoret, J. M. Martinis, D. Esteve, and J. Clarke,Phys. Rev. Lett. 53, 1260 (1984); M. H. Devoret, J. M. Martinis, and J. Clarke,Phys. Rev. Lett. 55,1908 (1985); J. M. Martinis, M. H. Devoret, and J. Clarke,Phys. Rev. B 35, 4682 (1987); A. N. Cleland, J. M. Martinis, and J. Clarke,Phys. Rev. B 37, 5950 (1988).Google Scholar
  3. 3.
    A. I. Larkin and Yu. N. Ovchinnikov,J. Low Temp. Phys. 63, 317 (1986).Google Scholar
  4. 4.
    A. I. Larkin and Yu. N. Ovchinnikov,Zh. Eksp. Teor. Fiz. 91, 318 (1986) [Sov. Phys. JETP64, 185 (1986)].Google Scholar
  5. 5.
    K. K. Likharev and A. B. Zorin,Low Temp. Phys. 59, 347 (1985); L. J. Geerligs, M. Peters, L. M. de Groot, A. Verbruggen, and J. E. Mooij,Phys. Rev. Lett. 63, 326 (1989); L. J. Geerligs, V. F. Anderegg, J. Romijn, and J. E. Mooij,Phys. Rev. Lett. 65, 377 (1990).Google Scholar
  6. 6.
    A. I. Larkin and Yu. N. Ovchinnikov,Sov. Phys. JEPT 86, 719 (1984).Google Scholar
  7. 7.
    A. I. Larkin, Yu. N. Ovchinnikov, and A. Schmid,Physica B 152, 266 (1988).Google Scholar

Copyright information

© Plenum Publishing Corporation 1992

Authors and Affiliations

  • Yu. N. Ovchinnikov
    • 1
  • P. Silvestrini
    • 1
  • B. Ruggiero
    • 1
  • A. Barone
    • 2
  1. 1.Istituto di Cibernetica del Consiglio Nazionale delle RicercheArco FeliceItaly
  2. 2.Dipartimento di Scienze FisicheUniversità di Napoli “Federico II,”NapoliItaly

Personalised recommendations