Zobrazeno 1 - 10
of 210
pro vyhledávání: '"Falomir, H."'
We propose a bicosmology model which is the classical analog of noncommutative quantum mechanics. From this point of view the sources of the modified FRW equations are dark energy ones governed by a Chapligyn's equation state. The parameters of nonco
Externí odkaz:
http://arxiv.org/abs/1807.08359
In the framework of a bimetric model, we discuss a relation between the (modified) Friedmann equations and a mechanical system similar to the quantum Hall effect problem. Firstly, we show how these modified Friedmann equations are mapped to an anisot
Externí odkaz:
http://arxiv.org/abs/1801.07575
The interaction between two initially causally disconnected regions of the universe is studied using analogies of non-commutative quantum mechanics and deformation of Poisson manifolds. These causally disconnect regions are governed by two independen
Externí odkaz:
http://arxiv.org/abs/1707.04670
We suggest that dark matter may be partially constituted by a dilute 't Hooft-Polyakov monopoles gas. We reach this conclusion by using the Georgi-Glashow model coupled to a dual kinetic mixing term $ F{\tilde {\cal G}}$ where $F$ is the electromagne
Externí odkaz:
http://arxiv.org/abs/1603.00433
We study two-dimensional Hamiltonians in phase space with noncommutativity both in coordinates and momenta. We consider the generator of rotations on the noncommutative plane and the Lie algebra generated by Hermitian rotationally invariant quadratic
Externí odkaz:
http://arxiv.org/abs/1507.06932
Publikováno v:
JHEP 1312 (2013) 024
We study the oscillations of a scalar field on a noncommutative disc implementing the boundary as the limit case of an interaction with an appropriately chosen confining background. The space of quantum fluctuations of the field is finite dimensional
Externí odkaz:
http://arxiv.org/abs/1307.4464
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 with generators of a unitary irreducible representation of the Lorent
Externí odkaz:
http://arxiv.org/abs/1208.6315
Autor:
Falomir, H., Pisani, P. A. G.
Publikováno v:
J. Phys. A: Math. Theor. 45 (2012) 374017
One of the many problems to which J.S. Dowker devoted his attention is the effect of a conical singularity in the base manifold on the behavior of the quantum fields. In particular, he studied the small-$t$ asymptotic expansion of the heat-kernel tra
Externí odkaz:
http://arxiv.org/abs/1202.6332
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 quantum mechanics techniques, the ground state is calculated exactly. We f
Externí odkaz:
http://arxiv.org/abs/1111.0511
Publikováno v:
J. Phys. A: Math. Theor. 45 (2012) 135308
In this article we employ a simple nonrelativistic model to describe the low energy excitation of graphene. The model is based on a deformation of the Heisenberg algebra which makes the commutator of momenta proportional to the pseudo-spin. We solve
Externí odkaz:
http://arxiv.org/abs/1109.6666