TY - JOUR
T1 - Free-energy landscape of simple liquids near the glass transition
AU - Dasgupta, Chandan
AU - Valls, Oriol T.
N1 - Copyright:
Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 2000/7/24
Y1 - 2000/7/24
N2 - Properties of the free-energy landscape in phase space of a dense hard-sphere system characterized by a discretized free-energy functional of the Ramakrishnan-Yussouff form are investigated numerically. A considerable number of glassy local minima of the free energy are located and the distribution of an appropriately defined `overlap' between minima is calculated. The process of transition from the basin of attraction of a minimum to that of another one is studied using a new `microcanonical' Monte Carlo procedure, leading to a determination of the effective height of free-energy barriers that separate different glassy minima. The general appearance of the free-energy landscape resembles that of a putting green: deep minima separated by a fairly flat structure. The growth of the effective free-energy barriers with increasing density is consistent with the Vogel-Fulcher law, and this growth is primarily driven by an entropic mechanism.
AB - Properties of the free-energy landscape in phase space of a dense hard-sphere system characterized by a discretized free-energy functional of the Ramakrishnan-Yussouff form are investigated numerically. A considerable number of glassy local minima of the free energy are located and the distribution of an appropriately defined `overlap' between minima is calculated. The process of transition from the basin of attraction of a minimum to that of another one is studied using a new `microcanonical' Monte Carlo procedure, leading to a determination of the effective height of free-energy barriers that separate different glassy minima. The general appearance of the free-energy landscape resembles that of a putting green: deep minima separated by a fairly flat structure. The growth of the effective free-energy barriers with increasing density is consistent with the Vogel-Fulcher law, and this growth is primarily driven by an entropic mechanism.
UR - http://www.scopus.com/inward/record.url?scp=0034226632&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034226632&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/12/29/327
DO - 10.1088/0953-8984/12/29/327
M3 - Conference article
AN - SCOPUS:0034226632
SN - 0953-8984
VL - 12
SP - 6553
EP - 6562
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 29
T2 - ICTP-NIS Conference on 'Unifying Concepts in Glass Physics'
Y2 - 15 September 1999 through 18 September 1999
ER -