Results 231 to 240 of about 73,139 (268)

Field-induced quasi-bound state within the two-magnon continuum of a square-lattice Heisenberg antiferromagnet

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Mansson M   +16 more
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Quantum Field Theory

Physical Review, 1950
It is usually contended that the quantum theory of fields is intrinsically divergent. The present paper attempts to show that this divergence is due to the perturbation theory generally employed and not to the field theory itself. By means of a minor modification in the perturbation calculations, the divergent integrals may be given appropriate finite ...
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Relativistic quantum field theory

Physics Today, 1966
THE RELATIVISTIC QUANTUM theory of fields was born some 35 years ago through the paternal efforts of Dirac, Heisenberg, Pauli and others. It was a somewhat retarded youngster, however, and first reached adolescence 17 years later, an event which we are gathered here to celebrate. But it is the subsequent development and more mature phase of the subject
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Quantum field theory of the Universe

Physical Review D, 1989
As is well known, the wave function of the Universe dictated by the Wheeler-DeWitt equation has a difficulty in its probabilistic interpretation. In order to overcome this difficulty, we explore a theoretical possibility of the second quantization of the Universe, following the same passage historically taken for the Klein-Gordon particles and the ...
, Hosoya, , Morikawa
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Postulates of Quantum Field Theory

Journal of Mathematical Physics, 1962
We give a survey of the postulates which provide the framework of quantum field theory. Particular attention is given to the lesser known ones, namely, completeness requirements and ``primitive causality.'' Three field theoretical models are analyzed. These examples show that ``primitive causality'' is not a consequence of the commonly used postulates (
Haag, Rudolf, Schroer, B.
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Finite quantum field theories

Physical Review D, 1986
We investigate the relation between finiteness of a four-dimensional quantum field theory and global supersymmetry. To this end we consider the most general quantum field theory and analyze the finiteness conditions resulting from the requirement of the absence of divergent contributions to the renormalizations of the parameters of the theory.
, Lucha, , Neufeld
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Topological quantum field theory

Publications Mathématiques de l'IHÉS, 1988
The starting point to topological quantum field theory was given by \textit{E. Witten} [J. Differ. Geom. 17, 661-692 (1982; Zbl 0499.53056)] where he explained the geometric meaning of super-symmetry, pointing out that for super-symmetric quantum mechanics the Hamiltonian is just the Hodge- Laplacian.
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Quantum field theory of anyons

Letters in Mathematical Physics, 1988
Particles with arbitrary real spin (neither integer nor half-integer) whose statistics are intermediate between Bose and Fermi statistics are called ``anyons''. Anyons can occur in gauge theories, and the authors expect that they can only occur in gauge theories, or in theories with a hidden local gauge invariance.
J. Froehlich, MARCHETTI, PIERALBERTO
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