123 citations · 754 across the 28 of their papers we have counts for
10 papers · 1 filter
Violation of the PT-symmetry and structure formation in the dark matter-gravitational wave interaction
Catarina Bastos, Hugo Terças
In flat spacetime, quantum fluctuations in dark matter, as described as a Bose-Einstein condensate, are stable and display a relativistic Bogoliubov dispersion relation. In the wea…
Entangled States and the Gravitational Quantum Well
Rui Alves, Catarina Bastos, Orfeu Bertolami
We study the continuous variable entanglement of a system of two particles under the influence of Earth's gravitational field. We determine a phase-space description of this bipart…
Vacuum decay in an interacting multiverse
S. Robles-Pérez, A. Alonso-Serrano, C. Bastos +1
We examine a new multiverse scenario in which the component universes interact. We focus our attention to the process of "true" vacuum nucleation in the false vacuum within one sin…
Interacting universes and the cosmological constant
A. Alonso-Serrano, C. Bastos, O. Bertolami +1
We study some collective phenomena that may happen in a multiverse scenario. First, it is posed an interaction scheme between universes whose evolution is dominated by a cosmologic…
Gravitational collapse in non-minimally coupled gravity: finite density singularities and the breaking of the no-hair theorem
J. Páramos, C. Bastos
In this work we study the dynamics of gravitational collapse of a homogeneous dust sphere in a model exhibiting a linear non-minimal coupling between matter and curvature. The evol…
Noncanonical Phase-Space Noncommutative Black Holes
Catarina Bastos, Orfeu Bertolami, Nuno Dias +1
In this contribution we present a noncanonical phase-space noncommutative (NC) extension of a Kantowski Sachs (KS) cosmological model to describe the interior of a Schwarzschild bl…
Noncommutative Black Holes
C. Bastos, O. Bertolami, N. C. Dias +1
One considers phase-space noncommutativity in the context of a Kantowski-Sachs cosmological model to study the interior of a Schwarzschild black hole. It is shown that the potentia…
Black Holes and Phase Space Noncommutativity
C. Bastos, O. Bertolami, N. C. Dias +1
We use the solutions of the noncommutative Wheeler-De Witt equation arising from a Kantowski-Sachs cosmological model to compute thermodynamic properties of the Schwarzschild black…
Phase-Space Noncommutative Quantum Cosmology
Catarina Bastos, Orfeu Bertolami, Nuno Costa Dias +1
We present a noncommutative extension of Quantum Cosmology and study the Kantowski-Sachs (KS) cosmological model requiring that the two scale factors of the KS metric, the coordina…
Berry Phase in the Gravitational Quantum Well and the Seiberg-Witten map
C. Bastos, O. Bertolami
We explicitly compute the geometrical Berry phase for the noncommutative gravitational quantum well for different SW maps. We find that they lead to different partial contributions…