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Renormalization-group study of gate charge effects in Josephson-junction chains by Choi, M. Y.; Rhee, Sung Wu; Lee, Minchul; Choi, J. is a scholarly article available to read on EtoBox.

What is Renormalization-group study of gate charge effects in Josephson-junction chains about?

We study the quantum phase transition in a chain of superconducting grains, coupled by Josephson junctions, with emphasis on the effects of gate charges induced on the grains. At zero temperature the system is mapped onto a two-dimensional classical Coulomb gas, where the gate charge plays the role of an imaginary electric field. Such a field is found relevant in the renormalization-group transformation and to change the nature of the superconductor-insulator transition present in the system, tending to suppress quantum fluctuations and helping establish superconductivity. On the basis of this observation, we propose the zero-temperature phase diagram on the plane of the gate charge and the energy ratio.

Author

Choi, M. Y.; Rhee, Sung Wu; Lee, Minchul; Choi, J.

Published

2000

Language

EN