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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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39 papers · 1 filter
Quantum Aspects of Gravity
P. C. Argyres, A. O. Barvinski, V. Frolov +4
Contributions from the G1 Working Group at the APS Summer Study on Particle and Nuclear Astrophysics and Cosmology in the Next Millennium, Snowmass, Colorado, June 29 - July 14, 19…
Finite particle creation in 3+1 de Sitter space
D. J. Lamb, A. Z. Capri, M. Kobayashi
In this paper we calculate the particle creation as seen by a stationary observer in 3+1 de Sitter space. This particle creation is calculated using an observer dependent geometric…
Finite particle creation in 1+1 dim. compact in space
D. J. Lamb, A. Z. Capri
In this paper we calculate the massive particle creation as seen by a stationary observer in a dimensional spacetime compact in space. The Bogolubov transformation relating t…
Microcanonical functional integral and entropy for eternal black holes
Erik A. Martinez
The microcanonical functional integral for an eternal black hole system is considered. This requires computing the microcanonical action for a spatially bounded spacetime region wh…
Discrete spectral shift in an anisotropic universe
D. J. Lamb, A. Z. Capri, M. Kobayashi
In this paper we calculate the particle creation as seen by a stationary observer in an anisotropic universe. By using an observer and geometry dependent time to quantise a massive…
Massive particle creation in a static 1+1 dimensional spacetime
D. J. Lamb, A. Z. Capri, S. M. Roy
We show explicitly that there is particle creation in a static spacetime. This is done by studying the field in a coordinate system based on a physical principle which has recently…
On the Off-Mass-Shell Deformation of the Nucleon Structure Function
A. Yu. Umnikov, F. C. Khanna, L. P. Kaptari
The off-mass-shell behavior of the nucleon structure function, , is studied within an approach motivated by the Sullivan model. Deep inelastic scattering on the nucleon is c…
Information Loss in Black Holes and/or Conscious Beings?
Don N. Page
In 1976 Stephen Hawking proposed that information may be lost from our universe as a pure quantum state collapses gravitationally into a black hole, which then evaporates completel…
Probabilities Don't Matter
Don N. Page
It is suggested that probabilities need not apply at all to matter in the physical world, which may be entirely described by the amplitudes given by the quantum mechanical state. I…
Structure of the Spherical Black Hole Interior
A. Bonanno, S. Droz, W. Israel +1
The internal structure of a charged spherical black hole is still a topic of debate. In a nonrotating but aspherical gravitational collapse to form a spherical charged black hole,…
Nucleosynthesis and the Time Dependence of Fundamental Couplings
Bruce A. Campbell, Keith A. Olive
We consider the effects of the time dependence of couplings due to their dependence on a dilaton field, as occurs in superstring theory, as well as in gravity theories of the Jorda…
Action and Hamiltonian for eternal black holes
Valeri Frolov, Erik A. Martinez
We present the Hamiltonian, quasilocal energy, and angular momentum for a spacetime region spatially bounded by two timelike surfaces. The results are applied to the particular cas…
Spectrum Degeneracy of General (p=2)--Parasupersymmetric Quantum Mechanics and Parasupersymmetric Topological Invariants
Ali Mostafazadeh
A thorough analysis of the general features of parasupersymmetric quantum mechanics is presented. It is shown that for both Rubakov--Spiridonov and Beckers--Debergh formula…
The Deuteron Spin Structure Functions in the Bethe-Salpeter Approach and the Extraction of the Neutron Structure Function
A. Yu. Umnikov, L. P. Kaptari, K. Yu. Kazakov +1
The nuclear effects in the spin-dependent structure functions and are calculated in the relativistic approach based on the Bethe-Salpeter equation with a realistic…
Hypersurface-Invariant Approach to Cosmological Perturbations
D. S. Salopek, J. M. Stewart
Using Hamilton-Jacobi theory, we develop a formalism for solving semi-classical cosmological perturbations which does not require an explicit choice of time-hypersurface. The Hamil…
Biased Discrete Symmetry Breaking and Fermi Balls
Alick L. Macpherson, Bruce A. Campbell
The spontaneous breaking of an approximate discrete symmetry is considered, with the resulting protodomains of true and false vacuum being separated by domain walls. Given a strong…
Resolving the Question of Time for Semiclassical Gravity
D. S. Salopek
Hamilton-Jacobi theory provides a natural starting point for a covariant description of the gravitational field. Using a spatial gradient expansion, one may solve for the phase of…
A Relativistic Approach to Deep Inelastic Scattering on the Deuteron
A. Yu. Umnikov, L. P. Kaptari, K. Yu. Kazakov +1
A covariant field theoretical approach to deep inelastic scattering on the deuteron is presented. The deuteron structure function is calculated in terms of the Bethe-Salpeter ampli…
Why the Entropy of a Black Hole is ?
Valeri P. Frolov
A black hole considered as a part of a thermodynamical system possesses the Bekenstein-Hawking entropy $S_H =A_H /(4l_{\mbox{\scriptsize{P}}}^2)$, where is the area of a blac…
Quantum scale of inflation and particle physics of the early universe
A. O. Barvinsky, A. Yu. Kamenshchik
The quantum gravitational scale of inflation is calculated by finding a sharp probability peak in the distribution function of chaotic inflationary cosmologies driven by a scalar f…
Quasilocal Energy for a Kerr black hole
Erik A. Martinez
The quasilocal energy associated with a constant stationary time slice of the Kerr spacetime is presented. The calculations are based on a recent proposal \cite{by} in which quasil…
Radiation collapse and gravitational waves in three dimensions
Viqar Husain
Two non-static solutions for three dimensional gravity coupled to matter fields are given. One describes the collapse of radiation that results in a black hole. This is the three d…
Dynamics of Massive Shells Ejected in a Supernova Explosion
D. Nunez, H. P. de Oliveira
An expanding shell is accelerated outward by radiation from the remnant star and slowed by ram pressure and accretion as it plows into the interstellar medium. We set up the genera…
Massless scalar fields in 1+1 dimensions and Krein spaces
A. Z. Capri, R. Ferrari, V. Montalbano
We consider the Krein realization of the Hilbert space for a massless scalar field in 1+1 dimensions. We find convergence criteria and the completion of the space of test functions…