1,721,003 research outputs found
Bateman's dual system revisited: quantization, geometric phase and relation with the ground-state energy of the linear harmonic oscillator
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Topological defects as inhomogeneous condensates in quantum field theory: Kinks in (1+1) dimensional lambda psi(4) theory
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Unified formalism for Thermal Quantum Field Theories: A geometric viewpoint
No full textIn this paper we study a unified formalism for Thermal Quantum Field Theories, i.e., for the Matsubara approach, Thermo Field Dynamics and the Path Ordered Method. To do so, we employ a mechanism akin to the Hawking effect which explores a relationship between the concept of temperature and spacetimes endowed with event-horizons. In particular, we consider an eight dimensional static spacetime, the so-called– spacetime, which we show to form an appropriate geometric background for generic Thermal Quantum Field Theories. Within this framework, the different formalisms of Thermal Field Theory are unified in a very natural way via various analytical continuations and the set of time-paths used in the Path Ordered Method is interpreted in geometric terms. We also explain reported inconsistencies inherent in the Thermo Field Dynamics through the appearance of horizons (and ensuing loss of information) in the eta–\xi spacetime
Dynamical generation of flavor vacuum and Lorentz invariance
No full textIn this paper we review dynamical generation of field mixing after chiral symmetry breaking. We also study the explicit form of Lorentz boosts transformations of flavor states in a two-flavor scalar model with field mixing. We find that Lorentz symmetry is spontaneously broken on flavor vacuum because of its dynamically generated condensate structure
Path-integral approach to 't Hooft's derivation of quantum physics from classical physics
No full textWe present a path-integral formulation of 't Hooft's derivation of quantum physics from classical physics. The crucial ingredient of this formulation is Gozzi 's supersymmetric path integral of classical mechanics. We quantize explicitly two simple classical systems: the planar mathematical pendulum and the Rossler dynamical system
Chiral symmetry-breaking schemes and dynamical generation of masses and field mixing
No full textIn this paper we review dynamical generation of field mixing after chiral symmetry breaking. We also study the explicit form of discrete transformations of flavor states in a two-flavor scalar model with field mixing. We find that CPT symmetry is spontaneously broken on flavor vacuum because of its dynamically generated condensate structure
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