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Proceedings Paper

Does measurement noise increase as a phase transition is approached?
Author(s): Zhi Chen; Clare C. Yu
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Paper Abstract

We study the energy and magnetization noise spectra associated with first and second order phase transitions by using Monte Carlo simulations of the Ising model and 5-state Potts model in 2D. For a finite size system, the total noise power and the low frequency white noise S(f < fknee) increase as Tc is approached. In the thermodynamic limit S(f < fknee) diverges but fknee → 0 and the total noise power vanishes. f-1knee is approximately the equilibration time. At high frequencies S(f > fknee) ~ f. For the Ising model, we relate μ to the critical exponents.

Paper Details

Date Published: 11 June 2007
PDF: 10 pages
Proc. SPIE 6600, Noise and Fluctuations in Circuits, Devices, and Materials, 66001Y (11 June 2007); doi: 10.1117/12.725521
Show Author Affiliations
Zhi Chen, Univ. of California, Irvine (United States)
Clare C. Yu, Univ. of California, Irvine (United States)

Published in SPIE Proceedings Vol. 6600:
Noise and Fluctuations in Circuits, Devices, and Materials
Massimo Macucci; Lode K.J. Vandamme; Carmine Ciofi; Michael B. Weissman, Editor(s)

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