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Macroscopic quantum electrodynamic effects in a superconducting ring containing a Josephson weak link

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Abstract

The problem of coherent flux tunnelling across a Josephson weak link enclosed by a thick superconducting (‘SQUID‘) ring in terms of quantum electrodynamics is considered. We show that for a low effective noise temperature (≃few K) in the SQUID ring and with the weak link capacitance ≲3 × 10−15, such a process should be observable. Experimental evidence is given to justify this claim.

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Author notes

  1. A. Widom, J. Sacco & G. Megaloudis

    Present address: Department of Physics, Northeastern University, Boston, Massachusetts, 02115

  2. F. Goodall

    Present address: Rutherford Laboratories (Appleton Division), Ditton Park, Slough, Bucks, SL3 9JX, UK

Authors and Affiliations

  1. School of Mathematical and Physical Sciences, University of Sussex, Brighton, Sussex, BN1 9QH, UK

    R. J. Prance, A. P. Long, T. D. Clark, A. Widom, J. E. Mutton, J. Sacco, M. W. Potts, G. Megaloudis & F. Goodall

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  1. R. J. Prance
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  2. A. P. Long
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  3. T. D. Clark
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  4. A. Widom
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  5. J. E. Mutton
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  6. J. Sacco
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  7. M. W. Potts
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  8. G. Megaloudis
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  9. F. Goodall
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Prance, R., Long, A., Clark, T. et al. Macroscopic quantum electrodynamic effects in a superconducting ring containing a Josephson weak link. Nature 289, 543–549 (1981). https://doi.org/10.1038/289543a0

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  • DOI: https://doi.org/10.1038/289543a0

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