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How unimodular gravity theories differ from general relativity at quantum level
(Springer, 2015-10-06)
We investigate path integral quantization of two versions of unimodular gravity. First a fully diffeomorphism-invariant theory is analyzed, which does not include a unimodular condition on the metric, while still being ...
Matthews´ theorem in effective Yang-Mills theories
(Revista Mexicana de Física, 2009)
Semiclassical coherent-states propagator
(American Physical Society, 2013-06)
In this work, we derived a semiclassical approximation for the matrix elements of a quantum propagator in coherent states (CS) basis that avoids complex trajectories; it only involves real ones. For that purpose, we used ...
LARGE-ORDER PERTURBATION EXPANSIONS FOR THE CHARGED HARMONIC-OSCILLATOR
(Iop Publishing Ltd, 1992-12-07)
The charged oscillator, defined by the Hamiltonian H = -d2/dr2+ r2 + lambda/r in the domain [0, infinity], is a particular case of the family of spiked oscillators, which does not behave as a supersingular Hamiltonian. ...
LARGE-ORDER PERTURBATION EXPANSIONS FOR THE CHARGED HARMONIC-OSCILLATOR
(Iop Publishing Ltd, 1992-12-07)
The charged oscillator, defined by the Hamiltonian H = -d2/dr2+ r2 + lambda/r in the domain [0, infinity], is a particular case of the family of spiked oscillators, which does not behave as a supersingular Hamiltonian. ...
Path integral quantization of generalized quantum electrodynamics
(Amer Physical Soc, 2013)
Nonsingular spiked harmonic oscillator
(1991-12-01)
A perturbative study of a class of nonsingular spiked harmonic oscillators defined by the Hamiltonian H= -d2/dr2 + r2 + λ/rα in the domain [0,∞] is carried out, in the two extremes of a weak coupling and a strong coupling ...
Nonsingular spiked harmonic oscillator
(1991-12-01)
A perturbative study of a class of nonsingular spiked harmonic oscillators defined by the Hamiltonian H= -d2/dr2 + r2 + λ/rα in the domain [0,∞] is carried out, in the two extremes of a weak coupling and a strong coupling ...