109 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidad Nacional Autónoma de MéxicoMX91 papers
- Universidad Michoacana de San Nicolás de HidalgoMX18 papers
- Pennsylvania State UniversityUS15 papers
- Universidad de MoreliaMX5 papers
- Tohoku UniversityJP4 papers
- University of CambridgeGB3 papers
- University of the WitwatersrandZA3 papers
- Centre National de la Recherche ScientifiqueFR2 papers
- Christian-Albrechts-Universität zu KielDE2 papers
- Graz University of TechnologyAT2 papers
- Institute of Mathematical SciencesIN2 papers
- King Abdulaziz UniversitySA2 papers
22 papers · 1 filter
Emergence of classical behavior in the early universe
Abhay Ashtekar, Alejandro Corichi, Aruna Kesavan
We investigate three issues that have been discussed in the context of inflation: Fading of the importance of quantum non-commutativity; the phenomenon of quantum squeezing; and th…
Canonical analysis of field theories in the presence of boundaries: Maxwell+Pontryagin
Alejandro Corichi, Tatjana Vukašinac
We study the canonical Hamiltonian analysis of gauge theories in the presence of boundaries. While the implementation of Dirac's program in the presence of boundaries, as put forwa…
Macroscopic observables from the comparison of local reference systems
Claudio Meneses, Jose A. Zapata
Parallel transport as dictated by a gauge field determines a collection of local reference systems. Comparing local reference systems in overlapping regions leads to an ensemble of…
A predictive framework for quantum gravity and black hole to white hole transition
Robert Oeckl
The apparent incompatibility between quantum theory and general relativity has long hampered efforts to find a quantum theory of gravity. The recently proposed positive formalism f…
Loop quantum cosmology of Bianchi IX: Inclusion of inverse triad corrections
Alejandro Corichi, Asieh Karami
We consider the loop quantization of the (diagonal) Bianchi type IX cosmological model. We explore different quantization prescriptions that extend the work of Wilson-Ewing and Sin…
Actions, topological terms and boundaries in first order gravity: A review
Alejandro Corichi, Irais Rubalcava-Garcia, Tatjana Vukasinac
In this review we consider first order gravity in four dimensions. In particular, we focus our attention in formulations where the fundamental variables are a tetrad and a…
Covariance in models of loop quantum gravity: Spherical symmetry
Martin Bojowald, Suddhasattwa Brahma, Juan D. Reyes
Spherically symmetric models of loop quantum gravity have been studied recently by different methods that aim to deal with structure functions in the usual constraint algebra of gr…
The gravitational Hamiltonian, first order action, Poincaré charges and surface terms
Alejandro Corichi, Juan D. Reyes
We consider the issue of attaining a consistent Hamiltonian formulation, after a 3+1 splitting, of a well defined action principle for asymptotically flat gravity. More precisely,…
Energy in first order 2+1 gravity
Alejandro Corichi, Irais Rubalcava-Garcia
We consider =0 three dimensional gravity with asymptotically flat boundary conditions. This system was studied by Ashtekar and Varadarajan within the second order formalism -wit…
Loop quantum cosmology of Bianchi IX: Effective dynamics
Alejandro Corichi, Edison Montoya
We study numerically the solutions to the effective equations of Bianchi IX spacetimes within Loop Quantum Cosmology. We consider Bianchi IX models with and without inverse triad c…
Hamiltonian and Noether charges in first order gravity
Alejandro Corichi, Irais Rubalcava-Garcia, Tatjana Vukasinac
We consider gravity in four dimensions in the vielbein formulation, where the fundamental variables are a tetrad and a SO(3,1) connection . We start with the most general ac…
Inflationary Attractors and their Measures
Alejandro Corichi, David Sloan
Several recent misconceptions about the measure problem in inflation and the nature of inflationary attractors are addressed. We show that within the Hamiltonian system of flat Fri…
Loop quantum cosmology of k=1 FLRW: Effects of inverse volume corrections
Alejandro Corichi, Asieh Karami
We consider the k=1 Friedman-Lemaitre-Robertson-Walker (FLRW) model within loop quantum cosmology (LQC), from the perspective of the two available quantization prescriptions. We fo…
A local true Hamiltonian for the CGHS model in new variables
Saeed Rastgoo
Following our previous work, a complete classical solution of the CGHS model in Hamiltonian formulation in new variables is given. We preform a series of analyses and transformatio…
Loop Quantum Cosmology
Ivan Agullo, Alejandro Corichi
This Chapter provides an up to date, pedagogical review of some of the most relevant advances in loop quantum cosmology. We review the quantization of homogeneous cosmological mode…
On the choice of time in the continuum limit of polymeric effective theories
Alejandro Corichi, Tatjana Vukasinac
In polymeric quantum theories, a natural question pertains to the so called continuum limit, corresponding to the limit where the `discreteness parameter' approaches zero. In p…
Energy of test objects on black hole spacetimes: A brief review
Alejandro Corichi
In this paper, we review the issue of defining energy for test particles on a background stationary spacetime. We revisit the different notions of energy as defined by different ob…
Effective constrained polymeric theories and their continuum limit
Alejandro Corichi, Tatjana Vukasinac
The classical limit of polymer quantum theories yields a one parameter family of `effective' theories labeled by λ. Here we consider such families for constrained theories and pose…
Effective Dynamics in Bianchi Type II Loop Quantum Cosmology
Alejandro Corichi, Edison Montoya
We numerically investigate the solutions to the effective equations of the Bianchi II model within the "improved" Loop Quantum Cosmology (LQC) dynamics. The matter source is a mass…
Coherent semiclassical states for loop quantum cosmology
Alejandro Corichi, Edison Montoya
The spatially flat Friedman-Robertson-Walker (FRW) cosmological model with a massless scalar field in loop quantum cosmology admits a description in terms of a completely solvable…
Loop quantum cosmology of k=1 FRW: A tale of two bounces
Alejandro Corichi, Asieh Karami
We consider the k=1 Friedman-Robertson-Walker (FRW) model within loop quantum cosmology, paying special attention to the existence of an ambiguity in the quantization process. In s…
On the Semiclassical Limit of Loop Quantum Cosmology
Alejandro Corichi, Edison Montoya
We consider a k=0 Friedman-Robertson-Walker (FRW) model within loop quantum cosmology (LQC) and explore the issue of its semiclassical limit. The model is exactly solvable and allo…