搜索结果: 1-15 共查到“理论物理学 Spacetime”相关记录21条 . 查询时间(0.093 秒)
On a Recent Construction of "Vacuum-like" Quantum Field States in Curved Spacetime
"Vacuum-like" Quantum Field States Curved Spacetime Mathematical Physics
2012/6/29
Afshordi, Aslanbeigi and Sorkin have recently proposed a construction of a distinguished "S-J state" for scalar field theory in (bounded regions of) general curved spacetimes. We establish rigorously ...
Huygens' Principle for the Klein-Gordon equation in the de Sitter spacetime
Huygens’ Principle Klein-Gordon Equation de Sitter spacetime Higuchi Bound
2012/6/14
In this article we prove that the Klein-Gordon equation in the de Sitter spacetime obeys the Huygens' principle if and only if the physical mass $m$ of the scalar field and the dimension $n$ of the sp...
Geometry and field theory in multi-fractional spacetime
Models of Quantum Gravity Field Theories in Lower Dimensions Fractal Geometry
2011/10/9
Abstract: We construct a theory of fields living on continuous geometries with fractional Hausdorff and spectral dimensions, focussing on a flat background analogous to Minkowski spacetime. After revi...
Constructing a quantum field theory from spacetime
quantum field theory spacetime High Energy Physics - Theory
2011/10/8
Abstract: The paper shows deep connections between exotic smoothings of a small R^4 (the spacetime), the leaf space of codimension-1 foliations (related to noncommutative algebras) and quantization. A...
Wave Propagation and Quasinormal Mode Excitation on Schwarzschild Spacetime
Wave Propagation Quasinormal Mode Schwarzschild Spacetime General Relativity and Quantum Cosmology
2011/7/28
Abstract: To seek a deeper understanding of wave propagation on the Schwarzschild spacetime, we investigate the relationship between (i) the lightcone of an event and its caustics (self-intersections)...
Revisiting special relativity: A natural algebraic alternative to Minkowski spacetime
Special Relativity Geometric algebra Clifford algebra Lorentz transformation
2011/7/28
Revisiting special relativity: A natural algebraic alternative to Minkowski spacetime.
Quantum Dirac Field on Moyal-Minkowski Spacetime - Illustrating Quantum Field Theory over Lorentzian Spectral Geometry
Quantum Dirac Field Illustrating Quantum Field Theory Lorentzian Spectral Geometry
2011/7/25
Abstract: A sketch of an approach towards Lorentzian spectral geometry (based on joint work with Mario Paschke) is described, together with a general way to define abstractly the quantized Dirac field...
The Random Discrete Action for 2-Dimensional Spacetime
The Random Discrete Action 2-Dimensional Spacetime
2010/12/27
A one-parameter family of random variables, called the Discrete Action, is defined for a 2-dimensional Lorentzian spacetime of finite volume. The single parameter is a discreteness scale. The expecta...
Noise kernel for a quantum field in Schwarzschild spacetime under the Gaussian approximation
quantum field Schwarzschild spacetime Gaussian approximation
2010/12/20
A method is given to compute the noise kernel, defined as the symmetrized con-nected 2-point function of the stress tensor, for the conformally invariant scalar field in the Hartle-Hawking state in Sc...
Holography and colliding gravitational shock waves in asymptotically AdS_5 spacetime
Holography colliding gravitational shock waves asymptotically AdS_5 spacetime
2010/12/21
The recognition that the quark-gluon plasma (QGP) produced in relativistic heavy ion col-
lisions is strongly coupled [1], combined with the ad-vent of gauge/gravity duality (or \holography") [2, 3],...
Junction conditions at spacetime singularities
Junction conditions spacetime singularities
2010/12/20
A classical model for the extension of singular spacetime geometries across their singularities
is presented. The regularization introduced by this model is based on the following observation.
Interplay between the small and the large scale structure of spacetime
the small the large scale structure of spacetime
2010/11/16
Existence of frame invariant, maximum, time interval $T$, length $L$, and mass $M$ is postulated. In the de Sitter universe - (1) the life span of universe, (2) the circumference of universe at the p...
A simple algebraic global isometric embedding is presented for the nonrotating BTZ black hole and its counterpart of Euclidean signature. The image of the em-bedding, inMinkowski space of two extra di...
Basic quantum mechanics for three Dirac equations in a curved spacetime
Dirac equation gravitation current conservation Hermitian Hamiltonian tensor representation
2010/6/30
We study the basic quantum mechanics for a fully general set of Dirac matrices in a curved spacetime by extending Pauli’s method. We further extend this study to three versions of the Dirac equation: ...
Spacetime rejects superposition due to discreteness
rejects superposition discrete spacetime quantum collapse
2010/3/18
The existence of a minimum size of spacetime is generally considered as an indispensable element in a complete theory of quantum gravity. In this essay we will analyze one of its implications for qua...