Quantum electrodynamics of a Josephson-junction capacitor
- 1 June 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 21 (11) , 5166-5171
- https://doi.org/10.1103/physrevb.21.5166
Abstract
The frequency dependence of the capacitance of a Josephson junction is discussed from the viewpoint of quantum electrodynamics. It is shown that the dissipative part of this capacitance is proportional to the Lehmann spectral function for "elementary particles" in quantum sine-Gordon field theories in one of two spatial dimensions. It is thus (in principle) possible to measure the "mass spectrum" of elementary bosons as well as a "soliton" vibrational frequency via the electrical properties of superconducting quantum interference devices.Keywords
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