By employing retarded and advanced propagators, Aurenche and Becherrawy showed how to rewrite the real-time thermal Feynman rules so that the temperature dependence is removed from the free propagators and transferred to the vertices. The present paper introduces retarded and advanced field operators and incorporates all temperature dependence into the interaction term of the Hamiltonian. Pertu...

Making a thermal analysis in the context of NLO SU(3) Chiral Perturbation Theory we see that isospin breaking (IB) corrections (both electromagnetic and QCD ones) to quark condensates are of order O(e2) and O(ε), with ε the π0−η mixing angle. However the combination χuu− χud of flavour breaking susceptibilities, which vanishes in the isospin limit and can be identified essentially with the conn...

Starting from a nonperturbative expression for entropy and density obtained from Φ-derivable two-loop approximations to the thermodynamic potential, a quasiparticle model for the thermodynamics of QCD can be developed which incorporates the physics of hard thermal loops and leads to a reorganization of the otherwise ill-behaved thermal perturbation theory through order α 3/2 s . Some details of...

Matsumoto and Yoshimura have recently argued that the number density of heavy particles in a thermal bath is not necessarily Boltzmann-suppressed for T ≪ M , as power law corrections may emerge at higher orders in perturbation theory. This fact might have important implications on the determination of WIMP relic densities. On the other hand, the definition of number densities in a interacting t...

The combined effect of variable thermal conductivity and radiative heat transfer on steady flow of a conducting optically thin viscous fluid through a channel with sliding wall and non-uniform wall temperatures under the influence of an externally applied homogeneous magnetic field are analyzed in the present study. The similarity transformation reduces the time dependent governing equations fo...

The Landauer principle asserts that the energy cost of erasure of one bit of information by the action of a thermal reservoir in equilibrium at temperature T is never less than kBT log 2. We discuss Landauer’s principle for quantum statistical models describing a finite level quantum system S coupled to an infinitely extended thermal reservoirR. Using Araki’s perturbation theory of KMS states a...

The thermal properties of silver are calculated within the quasiharmonic approximation, by using phonon dispersions from density-functional perturbation theory, and the pseudopotential plane-wave method. The resulting free energy provides predictions for the temperature dependence of various quantities such as the equilibrium lattice parameter, the bulk modulus, and the heat capacity. Our resul...

This article reviews the effects of the thermal environment on vigilance. A reinterpretation of early and contemporary studies contradicts the existing notion that vigilance is facilitated in ambient temperatures that exceed a comfortable level. Rather, performance is degraded as thermal homeostasis of the observer is disturbed. Significant breakdown in capability becomes manifest with measurab...

We calculate the free energy of a hot gluon plasma to leading order in hardthermal-loop-improved perturbation theory. Effects associated with screening, gluonic quasiparticles, and Landau damping are resummed to all orders. The ultraviolet divergences generated by the hard-thermal-loop propagator corrections can be cancelled by temperature-independent counterterms. The deviation of the hard-the...

Thermal rate constants for the H + D, reaction on the LSTH potential-energy surface are determined quantum mechanically over T = 300-1500 K using the quantum flux-flux autocorrelation function of Miller [J. Chem. Phys. 61, 1823 ( 1974) 3. Following earlier works [T. J. Park and J. C. Light, J. Chem. Phys. 91,974 ( 1989); T. J. Park and J. C. Light, ibid. 94, 2946 ( 199 1) 1, we use the adiabati...