Journal of Low Temperature Physics

, Volume 45, Issue 1–2, pp 37–47 | Cite as

Collective quantum tunneling, ultimate sensitivity of the AC SQUID, and all that

  • J. Kurkijärvi


The effect of quantum tunneling of the phase variable in SQUIDs is studied as a source of zero-temperature noise in the system. It is concluded that quantum tunneling plays no role in the ultimate uncertainty principle limitation of SQUID resolution. A simple expression is derived for the latter in practical SQUIDs.


Magnetic Material Phase Variable Simple Expression Uncertainty Principle Quantum Tunneling 
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Copyright information

© Plenum Publishing Corporation 1981

Authors and Affiliations

  • J. Kurkijärvi
    • 1
  1. 1.School of Mathematical and Physical SciencesUniversity of SussexBrightonEngland

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