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On the mass spectrum of noncommutative Schwinger model in R^2 space
mass spectrum noncommutative Schwinger model
2010/12/24
The mass spectrum of the noncommutative QED in two-dimensional Euclidean R^2 space is derived first in a perturbative approach at one-loop level and then in a nonperturbative approach using the equiv...
We discuss alternatives to the usual quantization of relativistic particles which result in discrete spectra for position and time operators
An analogue of the Newton-Wigner position operator is defined for a massive neutral scalar field in de Sitter space. The one-particle subspace of the theory, consisting of positive-energy solutions of...
Adiabaticity and emergence of classical space-time in time-dependent matrix theories
classical space-time time-dependent matrix theories
2010/12/23
We discuss the low-curvature regime of time-dependent matrix theories proposed to describe non-perturbative quantum gravity in asymptotically plane-wave space-times. The emergence of near-classical sp...
We construct a class of coherent spin-network states that capture proprieties of curved space-times of the Friedmann-Lamaˆıtre-Robertson-Walker type on which they are peaked.
Geodesics of electrically and magnetically charged test particles in the Reissner-Nordström space-time: analytical solutions
Geodesics of electrically magnetically charged test particles
2010/12/20
We present the full set of analytical solutions of the geodesic equations of charged test particles in the Reissner-Nordstr¨om space-time in terms of the Weierstraß }, and elliptic functions...
Static isolated horizons: SU(2) invariant phase space, quantization, and black hole entropy
Static isolated horizons invariant phase space quantization black hole entropy
2010/12/20
We study the classical field theoretical formulation of static generic isolated horizons in a man-ifestly SU(2) invariant formulation. We show that the usual classical description requires revision in...
Third order Lovelock black holes in flat space
Third order Lovelock black holes flat space
2010/12/20
In this paper, we present the asymptotically flat black hole solutions for arbitrary values of coefficients in third order Lovelock gravity, and then derive gravitational mass, Hawking temperature and...
We give an interpretation of the temperature in de Sitter universe in terms of a dynamical Unruh effect associated with the Hubble sphere. As with the quantum noise perceived by a uniformly accelerate...
Thermodynamics of Gauss-Bonnet-Born-Infeld black holes in AdS space
Thermodynamics Gauss-Bonnet-Born-Infeld black holes AdS space
2010/12/20
We construct solutions of a model which includes the Gauss-Bonnet and Born-Infeld terms for various horizon topologies (k = 0,±1), and then the mass, temperature,entropy and heat capacity of black hol...
Watch This Space: Observing Merging White Dwarfs
binary stars white dwarfs stellar evolution supernovae
2010/12/21
The Laser Interferometer Space Antenna (LISA) will open the low-frequency (0.1-100 mHz) part of the gravitational wave spectrum to direct observation. Of order 3600 galactic close binary white dwarfs ...
Space-Time Compactification, Non-Singular Black Holes, Wormholes and Braneworlds via Lightlike Branes
Space-Time Compactification Non-Singular Black Holes Wormholes and Braneworlds Lightlike Branes
2010/12/21
We describe a concise general scheme for constructing solutions of Einstein-Maxwell-Kalb-Ramond gravity-matter system in bulk space-time interacting selfconsistently with one or more (widely separated...
Fisher's zeros as boundary of RG flows in complex coupling space
Fisher's zeros boundary of RG flows complex coupling space
2011/1/13
We discuss the possibility of extending the RG flows to complex coupling spaces. We argue
that the Fisher’s zeros are located at the boundary of the complex basin of attraction of IR fixed points.
Comparing space+time decompositions in the post-Newtonian limit
space+time decompositions post-Newtonian limit
2010/12/20
We compare the Arnowitt-Deser-Misner (ADM) field decomposition with the Non-Relativistic Gravitational (NRG) fields for the purpose of computing the two-body post-Newtonian (PN) effective action withi...
Free Fock space and functional calculus approach to the n-point information about the "Universe"
Free Fock space functional calculus the n-point information
2010/11/16
Starting from a differential equation for the unique field, the equation for the generating vector |V> of the n-point information (correlation and smeared functions) in the free Fock space is derived...