Cavity syncronisation of underdamped Josephson junction arrays

P. Barbara, G. Filatrella, C. Lobb, Niels Falsig Pedersen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Our recent experiments show that arrays of underdamped Josephson junctions radiate coherently only above a threshold number of junctions switched onto the radiating state. For each junction, the radiating state is a resonant step in the current-voltage characteristics due to the interaction between the junctions in the array and an electromagnetic cavity. Here we show that a model of a one-dimensional array of Josephson junctions coupled to a resonator can produce many features of the coherent be havior above threshold, including coherent radiation of power and the shape of the array current-voltage characteristic. The model also makes quantitative predictions about the degree of coherence of the junctions in the array. However, in this model there is no threshold; the experimental below-threshold region behavior could not be reproduced.
Original languageEnglish
JournalThe European Physical Journal B
Volume34
Issue number1
Pages (from-to)3-8
ISSN1434-6028
Publication statusPublished - 2003

Cite this

Barbara, P. ; Filatrella, G. ; Lobb, C. ; Pedersen, Niels Falsig. / Cavity syncronisation of underdamped Josephson junction arrays. In: The European Physical Journal B. 2003 ; Vol. 34, No. 1. pp. 3-8.
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Cavity syncronisation of underdamped Josephson junction arrays. / Barbara, P.; Filatrella, G.; Lobb, C.; Pedersen, Niels Falsig.

In: The European Physical Journal B, Vol. 34, No. 1, 2003, p. 3-8.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Cavity syncronisation of underdamped Josephson junction arrays

AU - Barbara, P.

AU - Filatrella, G.

AU - Lobb, C.

AU - Pedersen, Niels Falsig

PY - 2003

Y1 - 2003

N2 - Our recent experiments show that arrays of underdamped Josephson junctions radiate coherently only above a threshold number of junctions switched onto the radiating state. For each junction, the radiating state is a resonant step in the current-voltage characteristics due to the interaction between the junctions in the array and an electromagnetic cavity. Here we show that a model of a one-dimensional array of Josephson junctions coupled to a resonator can produce many features of the coherent be havior above threshold, including coherent radiation of power and the shape of the array current-voltage characteristic. The model also makes quantitative predictions about the degree of coherence of the junctions in the array. However, in this model there is no threshold; the experimental below-threshold region behavior could not be reproduced.

AB - Our recent experiments show that arrays of underdamped Josephson junctions radiate coherently only above a threshold number of junctions switched onto the radiating state. For each junction, the radiating state is a resonant step in the current-voltage characteristics due to the interaction between the junctions in the array and an electromagnetic cavity. Here we show that a model of a one-dimensional array of Josephson junctions coupled to a resonator can produce many features of the coherent be havior above threshold, including coherent radiation of power and the shape of the array current-voltage characteristic. The model also makes quantitative predictions about the degree of coherence of the junctions in the array. However, in this model there is no threshold; the experimental below-threshold region behavior could not be reproduced.

M3 - Journal article

VL - 34

SP - 3

EP - 8

JO - European Physical Journal B. Condensed Matter and Complex Systems

JF - European Physical Journal B. Condensed Matter and Complex Systems

SN - 1434-6028

IS - 1

ER -