Physical sciences topic list of research papers
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Thermodynamics of charged Brans–Dicke AdS black holes
Abstract It is well known that in four dimensions, black hole solution of the Brans–Dicke–Maxwell equations is just the Reissner–Nordstrom solution with a constant scalar field. However, in n ⩾ ...
2009 / A. Sheykhi, M.M. Yazdanpanah -
Effect of the splitting of the neutron and proton effective masses on the nuclear symmetry energy at finite temperatures
Abstract We present the temperature and density dependence of symmetry energy for nuclear matter at finite temperatures based on the thermodynamics approach with the Skyrme energy density functional. We first classify the Skyrme interactions into 7...
2011 / Li Ou, Zhuxia Li, Yingxun Zhang, Min Liu -
String inspired quintom model with non-minimally coupled modified gravity
Abstract In this Letter we consider a quintom model of dark energy with non-minimal coupling between scalar field and modified gravity which is known f ( R ...
2009 / J. Sadeghi, M.R. Setare, A. Banijamali -
Statistical predictions from anarchic field theory landscapes
Abstract Consistent coupling of effective field theories with a quantum theory of gravity appears to require bounds on the rank of the gauge group and the amount of matter. We consider landscapes of field theories subject to such to boundedness...
2009 / Vijay Balasubramanian, Jan de Boer, Asad Naqvi -
Quantum wormhole and its dynamics
Abstract The two-dimensional dilaton gravity model is generalized to include a ghost Klein–Gordon field, i.e., a negative gravitational coupling, which supports the existence of static traversible wormhole solutions, and is semiclassically modified...
2004 / Hyunjoo Lee, Sung-Won Kim -
A dynamical cosmological term from the Verlinde's maps
Abstract In this Letter it is proposed another generalization of the Verlinde's maps for the case Λ ≠ 0 . Thermodynamical arguments combined with this...
2006 / Luis Alejandro Correa-Borbonet -
Vector meson decays from the extended chiral quark model
Abstract We derive the effective Lagrangian that describes the interactions among vector, axial-vector mesons and pseudoscalars starting from the extended chiral quark model (ECQM). The results for the low-energy constants of this effective...
2006 / G. D'Ambrosio, D. Espriu -
Discreteness of area in noncommutative space
Abstract We introduce an area operator for the Moyal noncommutative plane. We find that the spectrum is discrete, but, contrary to the expectation formulated by other authors, not characterized by a “minimum-area principle”. We show that an...
2009 / Giovanni Amelino-Camelia, Giulia Gubitosi, Flavio Mercati -
Cosmic duality in quintom Universe
Abstract In this Letter we study the duality in two-field quintom models of dark energy. We find that an expanding Universe dominated by quintom-A field is dual to a contracting Universe with quintom-B field.
2007 / Yi-Fu Cai, Hong Li, Yun-Song Piao, Xinmin Zhang -
On magnetic solution to 2+1 Einstein–Maxwell gravity
Abstract The three-dimensional magnetic solution to the Einstein–Maxwell field equations have been considered by some authors. Several interpretations have been formulated for this magnetic spacetime. Up to now this solution has been considered as a ...
2004 / Mauricio Cataldo, Juan Crisóstomo, Sergio del Campo, Patricio Salgado -
Phase transition for black holes with scalar hair and topological black holes
Abstract We study phase transitions between black holes with scalar hair and topological black holes in asymptotically anti-de Sitter spacetimes. As the ground state solutions, we introduce the non-rotating BTZ black hole in three dimensions and...
2008 / Yun Soo Myung -
Gravitational time delay of light for various models of modified gravity
Abstract We reexamined the gravitational time delay of light, allowing for various models of modified gravity. We clarify the dependence of the time delay (and induced frequency shift) on modified gravity models and investigate how to distinguish...
2008 / Hideki Asada -
Spinor dark energy and cosmological coincidence problem
Abstract Recently, the so-called Elko spinor field has been proposed to be a candidate of dark energy. It is a non-standard spinor and has unusual properties. When the Elko spinor field is used in cosmology, its unusual properties could bring some...
2010 / Hao Wei -
Meson retardation in deuteron electrodisintegration
Abstract The effect of meson retardation in NN-interaction and exchange currents on deuteron electrodisintegration is studied in a coupled channel approach including NN-, NΔ-, and πd-channels. It is shown that the influence of retardation depends on ...
2004 / M. Schwamb, H. Arenhövel -
Intermediate scale inflation and metastable supersymmetry breaking
Abstract We investigate the possibility of obtaining a low scale of supersymmetry breaking within the ISS framework using a metastable vacuum. This is achieved by introducing an R symmetry preserving gravitational coupling of the ISS sector to a...
2008 / Philippe Brax, Carlos A. Savoy, Arunansu Sil -
A New Notion of Causal Closedness2013 / Leszek Wroński, Michał Marczyk
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A Langevin Interpretation of PEPA Models
Abstract In this paper we examine a Langevin interpretation of the stochastic process algebra PEPA. We show how previous work on chemical systems yielding sets of stochastic differential equations (SDEs) can be adapted to the domain of computer...
2010 / Joris Slegers -
Head-to-head domain-wall phase diagram in mesoscopic ring magnets2004 / M. Kläui, C. A. F. Vaz, J. A. C. Bland, L. J. Heyderman, F. Nolting, et al.
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Bright and dark soliton solutions for a new fifth-order nonlinear integrable equation with perturbation terms
Abstract In this paper, we use the solitary wave ansatz method to carry out the integration of a new fifth-order nonlinear equation having perturbation terms. The perturbation terms that are considered are the first-order dispersion term, the power...
2011 / Houria Triki, Abdul-Majid Wazwaz -
String cosmological models with bulk viscosity in Nordtvedt's general scalar-tensor theory of gravitation2013 / Uma Maheswara Velagapudi, Neelima Davuluri