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Quantum quench in interacting field theory: a self-consistent approximation
Quantum quench self-consistent approximation
2010/3/10
We study a composite quantum quench of the energy gap and the interactions in the non-integrable \phi^4 model using a self-consistent approximation. Firstly we review the results for free theories whe...
Neutrino oscillations: Quantum mechanics vs. quantum field theory
Neutrino oscillations Quantum mechanics
2010/3/15
A consistent description of neutrino oscillations requires either the quantum-mechanical (QM) wave packet approach or a quantum field theoretic (QFT) treatment. We compare these two approaches to neut...
Black hole spacetimes that are topological geons in the sense of Sorkin can be constructed by taking a quotient of a stationary black hole that has a bifurcate Killing horizon. We discuss the geometri...
Transverse Ward-Takahashi Relation for the Vector Vertex in Quantum Field Theory
transverse symmetry relations gauge theory
2007/8/15
2001Vol.35No.1pp.32-35DOI:
Transverse Ward-Takahashi Relation for the Vector Vertex in Quantum Field Theory
HE Han-Xin
China Institute of Atomic Energy, P.O. Box 275 (18...
Correct Path-Integral Formulation of Quantum Thermal Field Theory
in Coherent State Representation
thermal fields partition function generating functional
coherent-state representation
2007/8/15
2005Vol.43No.4pp.641-656DOI:
Correct Path-Integral Formulation of Quantum Thermal Field Theory
in Coherent State Representation
SU Jun-Chen and ZHENG Fu-Hou
Center for ...
Mass Scales and Their Relations in Symmetric Quantum Field Theory
Mass Scales Symmetric Quantum Field Theory
2010/10/14
We illustrate the importance of mass scales and their relation in the specific case of the linear sigma model within the context of its one loop Ward identities. In the calculation it becomes apparent...
Classical Trajectories and Quantum Field Theory
Classical Trajectories Quantum Field Theory
2010/10/13
The density matrix and the Wigner function formalism requires the doubling of the degrees of freedom in quantum mechanics (QM) and quantum field theory (QFT). The doubled degrees of freedom play the r...
We review some conceptual problems in quantum field theory, with an emphasis on exact results and open problems.
Applications of Quantum Field Theory in Condensed Matter
Quantum Field Theory Condensed Matter
2010/10/26
We present a brief review of some applications of quantum field theory in condensed matter systems. These include isotropic and anisotropic antiferromagnetic chains, strongly correlated organic conduc...