Spatiotemporal chaos in Josephson-junction arrays

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.9376· OSTI ID:7202825

Bhagavatula, R; Ebner, C; Jayaprakash, C ^[1]

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1. Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)

We investigate the dynamical behavior of chaotic states in two-dimensional capacitive Josephson-junction arrays (JJA) driven by uniform external ac and dc currents via numerical simulations of the resistively-shunted-junction (RSJ) model. In chaotic states the distribution functions for the fluctuating voltages in individual transverse junctions have exponential tails similar to findings for the temperature in fluid turbulence. We present a mechanism for the origin of this behavior in arrays based on the random generation and motion of vortices. We also provide evidence to argue that collectively chaotic behavior does not occur.

• DOE Contract Number: FG02-88ER13916
• OSTI ID: 7202825
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:13; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AC SYSTEMS
ATTRACTORS
DC SYSTEMS
DISTRIBUTION FUNCTIONS
DYNAMICS
ENERGY SYSTEMS
FLUCTUATIONS
FUNCTIONS
JOSEPHSON JUNCTIONS
JUNCTIONS
MAGNETIC FLUX
MECHANICS
POWER SYSTEMS
RANDOMNESS
SUPERCONDUCTING JUNCTIONS
TWO-DIMENSIONAL CALCULATIONS
VARIATIONS