Spontaneous ordering against an external field in non-equilibrium systems

Field Theory of Non-equilibrium Systems

The physics of non-equilibrium many-body systems is one of the most rapidly expanding areas of theoretical physics. Traditionally used in the study of laser physics and superconducting kinetics, these techniques have more recently found applications in the study of dynamics of cold atomic gases, mesoscopic and nano-mechanical systems. The book gives a self-contained presentation of the modern f...

Green Equilibrium Measures and Representations of an External Field

We establish a representation for external …elds involving Green potentials. This is the analogue of the representation of Rakhmanov and Buyarov involving logarithmic potentials. We also establish related results, and present an example.

Non-equilibrium Ordering Dynamics and Pattern Formation

Equilibrium and Non-equilibrium Quantum Field Theory

We first focus in Chapter 2 on infrared effects in finite–temperature quantum field theory. We propose a simple mathematical method (based on the largest–time equation and the Dyson–Schwinger equations) which allows systematic calculations of the change of density in energy/particles in heat–bath during a scattering/decay of external particles within the heat bath. A careful analysis reveals th...

Out of Equilibrium Non-perturbative Quantum Field Dynamics in Homogeneous External Fields

The quantum dynamics of the symmetry broken λ (~ Φ2)2 scalar field theory in the presence of an homogeneous external field is investigated in the large N limit. We choose as initial state the ground state for a constant external field ~ J . The sign of the external field is suddenly flipped from ~ J to − ~ J at a given time and the subsequent quantum dynamics calculated. Spinodal instabilities ...