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281
A Note on Holography and Phase Transitions
Published 2011-01-01“…Focusing on the connection between the Landau theory of second-order phase transitions and the holographic approach to critical phenomena, we study diverse field theories in an anti de Sitter black hole background. Through simple analytical approximations, solutions to the equations of motion can be obtained in closed form which give rather good approximations of the results obtained using more involved numerical methods. …”
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282
An Interior Solution for the Kerr Metric: A Novel Approach
Published 2025-01-01“…Our findings reveal anisotropic fluid properties and energy condition behaviors in specific space-time regions, providing insights into the strong-field regime of rotating black holes. The proposed solution offers a more realistic description of rotating black hole interiors, with implications for understanding compact astrophysical objects.…”
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283
Complexity geometry and Schwarzian dynamics
Published 2020-01-01“…In many setups, this “Schwarzian” variable can be interpreted as the extremal volume of the dual black hole, and the resulting dynamics is simply that of a 1D Newtonian particle in an exponential potential. …”
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284
La topographie légendaire des itinéraires de la navette
Published 2015-06-01“…The commuter, the train and the route have been the object of a myth to serve a commercial policy as well as a development of the served cities.But the legend settled down only because it is one of the anthropological foundations and because the myth allows to combine incompatible elements, here the combination of the requirements of contemporary modernity and a more traditional life of provincial rooting.One of the aspects of the myth is that the TGV is a sterile environment and the countryside it goes through, a "black hole". Is it really the case ? Social practices and memory reinvest places and sometimes invent them. …”
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285
Spontaneous Lorentz symmetry-breaking constraints in Kalb–Ramond gravity
Published 2024-12-01“…Abstract In this work, we study timelike and lightlike geodesics in Kalb–Ramond (KR) gravity around a black hole with the goal of constraining the Lorentz symmetry-breaking parameter l. …”
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286
Multiwavelength Variability Analysis of the Blazar PKS 0727-11: An ~ 168 day Quasiperiodic Oscillation in the γ-Ray
Published 2025-01-01“…We demonstrate that QPO arising from the non-ballistic helical jet motion driven by the orbital motion in a supermassive binary black hole is a plausible physical explanation. In this scenario, the estimated mass of the primary black hole is M ∼ 3.66 × 10 ^8 –5.79 × 10 ^9 M _⊙ .…”
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287
Graviatoms with de Sitter Interior
Published 2013-01-01“…It is a gravitationally bound quantum system consisting of a nucleus represented by a regular primordial black hole (RPBH), its remnant or gravitational vacuum soliton G-lump, and a charged particle. …”
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288
Nos « silences construits » : nommer la violence épistémique au fondement de la théorie queer
Published 2024-07-01“…After exposing the epistemic violence of its “founding” texts, I will reinvest the metaphor of the “black hole” suggested by Evelynn Hammonds in “Black (W)holes and the Geometry of Black Female Sexuality” (1994) in order to take into consideration not only our “constructed silences”, but also our blank spots. …”
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289
Weak Minimal Area in Entanglement Entropy
Published 2015-01-01“…The necessary condition for the weak minimality is checked via Legendre test and its sufficient nature via Jacobi test. We show for AdS black hole with a strip type entangling region that it is this minimality condition that makes the hypersurface unable to cross the horizon, which is in agreement with that studied earlier by Engelhardt et al. and Hubeny using a different approach. …”
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290
Instability of Cauchy horizon induced by the graviton mass
Published 2025-01-01“…In the context of considering massless scalar field perturbations in a charged static black hole, our paper explores the impact of graviton mass on the stability of the Cauchy horizon. …”
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291
Generalising Holographic Superconductors
Published 2022-01-01“…Using a semianalytical procedure to compute the superconductor properties, we are able to further generalise the geometric description of the hologram beyond the AdS-Schwarzschild Black Hole paradigm and propose a set of higher-dimensional metrics which exhibit the same universal behaviour. …”
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292
Lorentz Invariance Violation and Modified Hawking Fermions Tunneling Radiation
Published 2016-01-01“…In this paper, the modified Dirac equation has been generalized in curved spacetime, and then fermion tunneling of black holes is researched under this correctional Dirac field theory. …”
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293
Modified Newton's Law of Gravitation due to Minimal Length in Quantum Gravity
Published 2013-01-01“…In this work, we discuss the effects of generalized uncertainty principle (GUP) which is proposed by some approaches to quantum gravity such as string theory, black hole physics, and doubly special relativity theories (DSR), on the area law of the entropy. …”
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294
Field Equations and Radial Solutions in a Noncommutative Spherically Symmetric Geometry
Published 2014-01-01“…This new line element interestingly reaffirms the coherent state theory for a noncommutative Schwarzschild black hole. For the first time, we derive the Newtonian gravitational force equation in the commutative relativity framework, and this result could provide the possibility to investigate examples in various topics in quantum and ordinary theories of gravity.…”
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295
Secure and high throughput routing protocol with QoS constraints in cognitive wireless Mesh networks
Published 2014-11-01“…A routing metric SIEB which includes link security,link conflict,link reliability and link available bandwidth was proposed.The SIEB includes link security and link performance two aspects.In order to resist various hole attack,the link trust value based on two hop neighbor feedback is computed in link security weight computing of SIEB.On this basis,a link security weight computing algorithm LSWC and a link performance weight computing algorithm LSPC were proposed,and a distributed routing protocol SIEBP with QoS constraints in cognitive wireless Mesh network was proposed.Finding safety routing path and maximizing the network throughput are the objective of SIEBP.Simulation results show that SIEBP routing protocol can achieve expectation goal.It can not only find safety routing path which can resist black hole attack,gray hole attack and worm hole attack,but also obtain a higher network throughput.…”
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296
A Possible Solution of the Cosmological Constant Problem Based on GW170817 and Planck Observations with Minimal Length Uncertainty
Published 2022-01-01“…We propose generalized uncertainty principle (GUP) with an additional term of quadratic momentum motivated by string theory and black hole physics and providing a quantum mechanical framework for the minimal length uncertainty, at the Planck scale. …”
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297
Why the Length of a Quantum String Cannot Be Lorentz Contracted
Published 2013-01-01“…In the latter case, we determine the critical boost that separates the ordinary “particle phase,” characterized by the Compton wavelength, from the “black hole phase,” characterized by the effective Schwarzschild radius of the colliding system.…”
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298
F(R) Gravity’s Rainbow and Its Einstein Counterpart
Published 2016-01-01“…In this paper, we introduce charged black hole solutions with power Maxwell invariant source in the context of gravity’s rainbow. …”
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299
AGN Obscuration and the Unified Model
Published 2012-01-01“…In this paper, we review the various pieces of evidence for obscuring media on different scales, from the vicinity of the black hole to the host galaxy, in order to picture an updated unification scenario explaining the complex observed phenomenology. …”
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300
Minimum asymptotic energy of a charged spherically symmetric thin-shell wormhole and its stability
Published 2025-02-01“…Abstract The static spherically symmetric thin shell of proper mass m and electric charge q around a central star or black hole of mass M is in general unstable. Although with fine-tuned m, q, and M it can be considered quasi-stable. …”
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