456 citations · 2.7k across the 111 of their papers we have counts for
18 papers · 1 filter
QED Fermions in a noisy magnetic field background: The effective action approach
Jorge David Castaño-Yepes, Marcelo Loewe, Enrique Muñoz +1
We consider the effects of a noisy magnetic field background over the fermion propagator in QED, as an approximation to the spatial inhomogeneities and time-fluctuations that would…
QED Fermions in a noisy magnetic field background
Jorge David Castaño-Yepes, Marcelo Loewe, Enrique Muñoz +2
We consider the effects of a noisy magnetic field background over the fermion propagator in QED, as an approximation to the spatial inhomogeneities that would naturally arise in ce…
Gluon polarization tensor in a magnetized medium: Analytic approach starting from the sum over Landau levels
Alejandro Ayala, Jorge David Castaño-Yepes, M. Loewe +1
We present an analytic method to compute the one-loop magnetic correction to the gluon polarization tensor starting from the Landau-level representation of the quark propagator in…
Particle-antiparticle asymmetry from magnetogenesis through the Landau mechanism
D. Carcamo, Ashok Das, J. Gamboa +1
Motivated by string theory an extension of the Landau problem to quantum field theory is considered. We show that the commutator between momenta of the fields violates Lorentz and…
Noncommutativity in (2+1)-dimensions and the Lorentz group
H. Falomir, F. Vega, J. Gamboa +2
In this article we considered models of particles living in a three-dimensional space-time with a nonstandard noncommutativity induced by shifting canonical coordinates and momenta…
Spin Non-commutativity and the Three-Dimensional Harmonic Oscillator
H. Falomir, J. Gamboa, M. Loewe +2
A three-dimensional harmonic oscillator with spin non-commutativity in the phase space is considered. The system has a regular symplectic structure and by using supersymmetric quan…
Feynman Diagrams and a Combination of the Integration by Parts (IBP) and the Integration by Fractional Expansion (IBFE) Techniques
Ivan Gonzalez, Marcelo Loewe
In this paper we show how to improve and extend the Integration by Fractional Expansion technique (IBFE) by applying it to certain families of scalar massive Feynman diagrams. The…
Relativistic Violation Invariance, Multiverses and Quantum Field Theory
J. Gamboa, M. Loewe, F. Mendez
The possibility of interaction among multiverses is studied assuming that in the first instants of the big-bang, many disjoint regions were created producing many independent unive…
Central Charges and Effective Action at Finite Temperature and Density
J. Gamboa, J. Lopez-Sarrion, M. Loewe +1
The current algebra for gauge theories like QCD at finite temperature and density is studied. We start considering, the massless Thirring model at finite temperature and density, f…
Quantum Theory of Tensionless Noncommutative p-Branes
J. Gamboa, M. Loewe, F. Mendez
The quantum theory involving noncommutative tensionless p-branes is studied following path integral methods. Our procedure allow a simple treatment for generally covariant noncommu…
Testing spatial noncommutativiy via the Aharonov-Bohm effect
H. Falomir, J. Gamboa, M. Loewe +2
The possibility of detecting noncommutative space relics is analyzed using the Aharonov-Bohm effect. We show that, if space is noncommutative, the holonomy receives non-trivial kin…
Noncommutative Quantum Mechanics: The Two-Dimensional Central Field
J. Gamboa, M. Loewe, F. Mendez +1
Quantum mechanics in a noncommutative plane is considered. For a general two dimensional central field, we find that the theory can be perturbatively solved for large values of the…
The Landau problem and noncommutative quantum mechanics
J. Gamboa, M. Loewe, F. Mendez +1
The conditions under which noncommutative quantum mechanics and the Landau problem are equivalent theories is explored. If the potential in noncommutative quantum mechanics is chos…
Noncommutativity and the Aharonov-Bohm Effect
J. Gamboa, M. Loewe, J. C. Rojas
The possibility of detecting noncommutive space relics is analyzed by using the Aharonov-Bohm effect. If space is non-commutative, it turns out that the holonomy receives kinematic…
Non-Commutative Quantum Mechanics
J. Gamboa, M. Loewe, J. C. Rojas
A general non-commutative quantum mechanical system in a central potential in two dimensions is considered. The spectrum is bounded from below and for large values of the…
Casimir energy for a scalar field with a frequency dependent boundary condition
H. Falomir, K. Rébora, M. Loewe
We consider the vacuum energy for a scalar field subject to a frequency dependent boundary condition. The effect of a frequency cut-off is described in terms of an {\it incomplete}…
Thermal Renormalons in Scalar Field Theory
M. Loewe, C. Valenzuela
In the frame of the scalar theory , we explore the occurrence of thermal renormalons, i. e. temperature dependent singularities in the Borel plane. The discussion of a par…
Massless fermions in a bag at finite density and temperature
M. De Francia, H. Falomir, M. Loewe
We introduce the chemical potential in a system of massless fermions in a bag by impossing boundary conditions in the Euclidean time direction. We express the fermionic mean number…