منابع مشابه
Non-Anticommutative Quantum Field Theory
Non-anticommutative field theory is studied in which the spacetime coordinates satisfy a non-anticommuting relation. A supervector super space is introduced as the underlying mathematical formalism for the quantized spacetime. Perturbative scalar field theory is investigated and one loop diagrams are calculated and found to be finite due to the damping caused by a Gaussian factor in the propaga...
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Quantum information theory is used to analyze various non-linear operations on quantum states. The universal disentanglement machine is shown to be impossible, and partial (negative) results are obtained in the state-dependent case. The efficiency of the transformation of non-orthogonal states into orthogonal ones is discussed.
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The problem of understanding the role of large gauge transformations in thermal field theories has recently inspired a number of studies of a one dimensional field theory. Such work has led to the conclusion that gauge invariance is restored only when the entire perturbation expansion can be summed. A careful reexamination of that model is shown, however, to lead to vastly different conclusions...
متن کاملNoncommutative and Non-Anticommutative Quantum Field Theory
A noncommutative and non-anticommutative quantum field theory is formulated in a superspace, in which the superspace coordinates satisfy noncommutative and non-anticommutative relations. A perturbative scalar field theory is investigated in which only the non-anticommutative algebraic structure is kept, and one loop diagrams are calculated and found to be finite due to the damping caused by a G...
متن کاملEquilibrium 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...
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ژورنال
عنوان ژورنال: Rocky Mountain Journal of Mathematics
سال: 1978
ISSN: 0035-7596
DOI: 10.1216/rmj-1978-8-1-341