Transient four-wave mixing experiments with 100 fs pulses in a dense potassium vapor probe the electronic energy fluctuations that lead to optical decoherence. Echo-peak shift experiments yield a biexponential two-time correlation function of energy level fluctuations. Molecular dynamics simulations show that the slow component is a many-body excitonic contribution arising from long-range reson...

We study numerically the geometrical and free-energy fluctuations of a static one-dimensional (1D) interface with a short-range elasticity, submitted to a quenched random-bond Gaussian disorder of finite correlation length ξ>0 and at finite temperature T. Using the exact mapping from the static 1D interface to the 1+1 directed polymer (DP) growing in a continuous space, we focus our analysis on...

The imbalanced utilization and the diversity of circuitry cause on-chip temperature gradients. Different sections of high-performance integrated circuits typically operate at different temperatures. Furthermore, environmental temperature fluctuations can cause significant variations in the die temperature. Temperature fluctuations alter the speed characteristics of CMOS circuits. Several techni...

We work out a superstatistical description of high-energy scattering processes that takes into account temperature fluctuations in small volume elements. For Γ-distributed fluctuations of the inverse temperature one effectively obtains formulas similar to those used in nonextensive statistical mechanics, whereas for other temperature distributions more general superstatistical models arise. We ...