1{bold /}{omega} Flux Noise and Dynamical Critical Properties of Two-Dimensional {ital XY} Models
- Instituut voor Theoretische Fysica, Princetonplein 5, Postbus 80006, 3508 TA Utrecht (The Netherlands)
- Physics Department and Center for the Interdisciplinary Research on Complex Systems, Northeastern University, Boston, Massachusetts 02115 (United States)
- Institut fuer Theoretische Physik, Universitaet Wuerzburg, Am Hubland, 97074 Wuerzburg (Germany)
We have numerically studied the dynamic correlation functions in thermodynamic equilibrium of two-dimensional O(2) symmetry models with either bond [resistively shunted Josephson (RSJ)] or site [time-dependent Ginsburg-Landau (TDGL)] dissipation as a function of temperature T. We find that above the critical temperature the frequency dependent flux noise S{sub {Phi}}({omega}){approximately}{vert_bar}1+( {omega}/{Omega}){sup 2}{vert_bar}{sup -{alpha} (T)/2}, with 0.85{le}{alpha}(TDGL)(T){le}0.95 and 1.17{le}{alpha}(RSJ)( T){le}1.27, while the dynamic critical exponents z(TDGL){approximately}2.0 and z(RSJ){approximately}0.9. Contrary to expectation the TDGL results are in closer agreement with the experiments in Josephson-junction arrays by Shaw {bold {ital et al.}}[Phys.Rev.Lett.{ital 76}, 2551 (1996)] than those from the RSJ model. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 475285
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
Similar Records
Indirect {ital CP} violation in the neutral kaon system beyond leading logarithms
Scaling of Josephson logic circuits