A5016208921- Black Holes and Theoretical Physics
- Noncommutative and Quantum Gravity Theories
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Quantum Mechanics and Applications
- Quantum Mechanics and Non-Hermitian Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Chromodynamics and Particle Interactions
- Atomic and Subatomic Physics Research
- Topological Materials and Phenomena
- Quantum Electrodynamics and Casimir Effect
- Quantum and electron transport phenomena
- Neutrino Physics Research
- Quantum, superfluid, helium dynamics
- Quantum chaos and dynamical systems
- Relativity and Gravitational Theory
- Algebraic structures and combinatorial models
- Quantum Information and Cryptography
- Advanced Thermodynamics and Statistical Mechanics
- Physics of Superconductivity and Magnetism
- Astrophysics and Cosmic Phenomena
- Quantum and Classical Electrodynamics
- Quantum many-body systems
- Statistical Mechanics and Entropy
Universidad de Santiago de Chile
2015-2024
Centre National de la Recherche Scientifique
1993-2022
Sorbonne Université
1993-2022
Institut National de Physique Nucléaire et de Physique des Particules
2022
Laboratoire de Physique Nucléaire et de Hautes Énergies
2022
Universidad Nacional del Centro de la Provincia de Buenos Aires
2016
Consejo Nacional de Investigaciones Científicas y Técnicas
2016
Yale University
2016
University of California, San Diego
2016
Pontificia Universidad Católica de Chile
2012
A general non-commutative quantum mechanical system in a central potential $V=V(r)$ two dimensions is considered. The spectrum bounded from below and for large values of the anticommutative parameter $\theta $, we find an explicit expression eigenvalues. In fact, any with these characteristics equivalent to commutative one such way that interaction $V(r)$ replaced by $V = V ({\hat H}_{HO}, {\hat L}_z)$, where ${\hat H}_{HO}$ hamiltonian two-dimensional harmonic oscillator L}_z$ z- component...
The exploration of the universe has recently entered a new era thanks to multi-messenger paradigm, characterized by continuous increase in quantity and quality experimental data that is obtained detection various cosmic messengers (photons, neutrinos, rays gravitational waves) from numerous origins. They give us information about their sources properties intergalactic medium. Moreover, astronomy opens up possibility search for phenomenological signatures quantum gravity. On one hand, most...
The modification of the quantum mechanical commutators in a relativistic theory with an invariant length scale (DSR) is identified. Two examples are discussed where classical behavior approached one case when energy approaches inverse which appears as cutoff and second mass much larger than length.
We explore the conditions under which noncommutative quantum mechanics and Landau problem are equivalent theories. If potential in is chosen as V=Ωℵ with ℵ defined text, then for value [Formula: see text] (which measures effects of space), theories lowest level. For other systems one can find different values and, therefore, possible bounds should be searched a physical independent scenario. This last fact could explain found literature.
The possibility of detecting noncommutative space relics is analyzed using the Aharonov-Bohm effect. We show that, if noncommutative, holonomy receives nontrivial kinematical corrections that will produce a diffraction pattern even when magnetic flux quantized. scattering problem also formulated, and differential cross section calculated. Our results can be extrapolated to high energy physics bound $\ensuremath{\theta}\ensuremath{\sim}[10 \mathrm{TeV}{]}^{\ensuremath{-}2}$ found. If this...
We investigate the emergence of geometric phases in chiral transformations within gauge theories coupled to fermions. begin by analyzing Schwinger model (1+1) dimensions, where symmetry is explicitly modified due dynamical generation a photon mass. This provides controlled setting study interplay between anomalies and vacuum structure. Building on these insights, we extend our analysis four-dimensional QED promoting angle $\theta$ field $\theta(x)$. generalization allows us explore how axial...
Quantum mechanics in a noncommutative plane is considered. For general two-dimensional central field, we find that the theory can be perturbatively solved for large values of parameter (θ) and explicit expressions eigenstates eigenvalues are given. The Green function explicitly obtained show it expressed as an infinite series. polynomial type potentials, found smooth limit small θ nonpolynomial ones this necessarily abrupt. Landau problem, case system, also
The connection between Lorentz invariance violation and noncommutativity of fields in a quantum field theory is investigated. A new dispersion relation for free with just one additional noncommutative parameter obtained. While values the scale much larger than 10−20 eV−1 are ruled out by present experimental status, cosmic ray physics would be compatible sensible to arising from gravity effects. We explore matter–antimatter asymmetry which naturally this framework.
The connection between the Lorentz invariance violation in Lagrangian context and quantum theory of noncommutative fields is established for $U(1)$ gauge field. modified Maxwell equations coincide with other derivations obtained using different procedures. These are interpreted as describing macroscopic ones a polarized magnetized medium. A tiny magnetic field (seed) emerges particular static solution that gradually increases once solved self-consistent system.
The supersymmetric extension of the system consisting a relativistic scalar particle interacting with gauge field is discussed. construction based on ground-state wavefunction representation for quantum mechanics. authors exploit fact that any invariant under spacetime reparametrisations has vanishing Hamiltonian.
A general three-dimensional noncommutative quantum mechanical system mixing spatial and spin degrees of freedom is proposed. The analogous the harmonic oscillator in this description contains a magnetic dipole interaction ground state explicitly computed we show that it infinitely degenerated implying spontaneous symmetry breaking. model can be straightforwardly extended to many particles main above properties are retained. Possible applications Bose–Einstein condensation with dipole–dipole...
The Aharonov-Bohm effect including spin-noncommutative effects is considered. At linear order in $\ensuremath{\theta}$, the magnetic field gauge invariant although spatially strongly anisotropic. Despite this anisotropy, Schr\"odinger-Pauli equation separable through successive unitary transformations and exact solution found. scattering amplitude calculated compared with usual case. In noncommutative case differential cross section independent of $\ensuremath{\theta}$.
The motion of relativistic particles around three dimensional black holes following the Hamilton-Jacobi formalism is studied. It follows that equation can be separated and reduced to quadratures in analogy with four case. shown that: a) are trapped by hole independently their energy angular momentum, b) matter alway falls centre cannot understake a stables orbits as dimensions. For extreme values momentum hole, we were able find exact solutions equations trajectories test particle.
We point out that a cold dark matter condensate made of gauge bosons from an extra hidden U(1) sector—dubbed photons—can create small, oscillating electric density current. Thus, they could also be searched for in the recently proposed LC-circuit setup conceived axion search by Sikivie, Sullivan and Tanner. estimate sensitivity this hidden-photon we find it cover sizable, so far unexplored parameter space.
We discuss a minimal canonical modification of electrodynamics in order to account for ultraviolet Lorentz violating effects. This creates birefringence that rotates the polarization planes from different directions. Such effects might be detectable anisotropic Cosmic Microwave Background radiation.
We explore the possibility of baryogenesis without departure from thermal equilibrium. A possible scenario is found, though it contains strong constraints on size $CPT$ violation ($CPTV$) effects and role $B$ (baryon number) nonconserving interactions which are needed for it.
The chiral anomaly in the context of an extended standard model with Lorentz invariance violation is studied. Taking into account bounds from measurements speed light, we argue that and its consequences are general results valid even beyond relativistic symmetry.
In this article we employ a simple nonrelativistic model to describe the low energy excitation of graphene. The is based on deformation Heisenberg algebra which makes commutator momenta proportional pseudo-spin. We solve Landau problem for resulting Hamiltonian reduces, in large mass limit while keeping fixed Fermi velocity, usual linear one employed these excitations as massless Dirac fermions. This model, extended negative mass, allows reproduce leading terms expansion dispersion relation...