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Solutions of the Dirac Equation in a Bardeen Black Hole Geometry
Annals of West University of Timisoara: Physics, 2019 In this paper we study the Dirac equation in the geometry of a (regular) Bardeen black hole. We will focus on finding new analytical solutions in the vicinity of the black hole horizon.
Sporea Ciprian A.
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The Vacuum State of Primordial Fluctuations in Hybrid Loop Quantum Cosmology
Universe, 2018 We investigate the role played by the vacuum of the primordial fluctuations in hybrid Loop Quantum Cosmology. We consider scenarios where the inflaton potential is a mass term and the unperturbed quantum geometry is governed by the effective dynamics of ...
Beatriz Elizaga Navascués +2 more
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Discrete O(1,4) Transformations And New Scalar Quantum Modes On The De Sitter Spacetime
Annals of West University of Timisoara: Physics, 2012 It is shown that the isometry group of the de Sitter spacetime includes two different three-dimensional Abelian subgroups which transform between themselves through a discrete isometry corresponding to the time reversal in the five-dimensional Minkowski ...
Cotăescu Ion I.
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Preserving information from the beginning to the end of time in a Robertson–Walker spacetime
New Journal of Physics, 2014 Preserving information stored in a physical system subjected to noise can be modeled in a communication-theoretic paradigm, in which storage and retrieval correspond to an input encoding and output decoding, respectively.
Stefano Mancini +2 more
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Spontaneous quantization of the Yang–Mills gradient flow
Nuclear Physics BWe formulate a nonsingular loop–space calculus for the Yang–Mills (YM) gradient flow directly in terms of Wilson loop functionals, rather than the underlying gauge fields.
Alexander Migdal
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Birth of a quasi-stationary black hole in an outcoupled Bose–Einstein condensate
New Journal of Physics, 2014 We study the evolution of an initially confined atom condensate, which is progressively outcoupled by gradually lowering the confining barrier on one side. The goal is to identify protocols that best lead to a quasi-stationary sonic black hole separating
J R M de Nova +3 more
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Quantum steering for different types of Bell-like states in gravitational background
Physics Letters BIn a relativistic framework, it is generally accepted that quantum steering of maximally entangled states provides greater advantages in practical applications compared to non-maximally entangled states. In this paper, we investigate quantum steering for
Si-Han Li, Si-Han Shang, Shu-Min Wu
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Experimental quantum cosmology in time-dependent optical media
New Journal of Physics, 2014 It is possible to construct artificial spacetime geometries for light by using intense laser pulses that modify the spatiotemporal properties of an optical medium.
N Westerberg +4 more
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Nuclear Physics BWe construct static, spherically symmetric wormhole solutions with a nontrivial redshift function, inspired by noncommutative geometry, in which point sources are replaced by Gaussian smearing of minimal length, yielding a regular shape function.
Davide Batic +2 more
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Advantages and disadvantages of maximally entangled states in dilaton black hole background
Physics Letters BWe investigate quantum entanglement and coherence for four classes of Bell-like fermionic states in the vicinity of the event horizon of a Garfinkle-Horowitz-Strominger (GHS) dilaton black hole. Contrary to the common expectation that maximally entangled
Zhen Yang, He Cheng, Si-Han Li
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