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Critical processes, Langevin equation and universality

✍ Scribed by Shu-dong Zhang; Qin-liang Fan; E-jiang Ding

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
416 KB
Volume
203
Category
Article
ISSN
0375-9601

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## It shown that formulation of generalized Langevin leads to non-decaying correlation (x, R(t) ) = x, R ) where R ( t ) is the random acceleration at time t, x is the position of a Brownian particle at t=O and R = R( 0). This is a serious difficulty in view of the fundamental requirement form irr

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We study stochastic aspects inherent to the (non-)equilibrium real time Green's function description (or ``closed time path Green's function'' CTPGF) of transport equations, the so-called ``Kadanoff Baym equations.'' We couple a free scalar boson quantum field to an environmental heat bath with some