Abstract We review the Nambu-Jona-Lasinio (NJL) approach to the dynamical breaking of
chiral symmetry in Quantum Chromodynamics (QCD). After a general overview of the …

The physical and theoretical foundations are presented for the mean-field theory of nuclear
structure and dynamics. Salient features of the many-body theory of stationary states are …

A book of techniques and applications, this text defines the path integral and illustrates its
uses by example. It is suitable for advanced undergraduates and graduate students in …

This is a concise graduate level introduction to analytical functional methods in quantum
field theory. Functional integral methods provide relatively simple solutions to a wide range …

The Gaussian-effective-potential approach is used to explore the physics of λ φ 4 field theory
in 1, 2, 3, and 4 spacetime dimensions. A simple and systematic approach to the …

The effective potential in scalar quantum field theory is calculated using different expansions
of the path integral for the generating functional. The conventional loop expansion is …

An effective action technique for the time evolution of a closed system consisting of one or
more mean fields interacting with their quantum fluctuations is presented. By marrying large …

The time evolution of O (N) symmetric λ (Φ 2) 2 scalar field theory is studied in the large N
limit. In this limit the< Φ i> mean field and two-point correlation function< Φ i Φ j> evolve …

Abstract The thermodynamics of the (2+ 1)-dimensional Gross-Neveu model is analyzed.
The model is not renormalizable in the weak-coupling expansion but becomes …

The nucleon-quark mixed matter is defined in the Brueckner-Hartree-Fock framework, in
which quark densities are determined by equilibrium conditions between nucleon and quark …