搜索结果: 1-15 共查到“理论物理学 Cosmology”相关记录30条 . 查询时间(0.059 秒)
Artificial Cosmogenesis: A New Kind of Cosmology
arti cial cosmogenesis cosmic evolution computational cosmology digital physics Drake equation
2012/5/29
This paper introduces foundations for a new kind of cosmology. We advocate that computer simulations are needed to address two key cosmological issues. First, the robustness of the emergence of comple...
Notes on dark energy interacting with dark matter and unparticle in loop quantum cosmology
Notes dark energy dark matter unparticle loop quantum cosmology
2011/8/3
Abstract: We investigate the behavior of dark energy interacting with dark matter and unparticle in the framework of loop quantum cosmology. In four toy models, we study the interaction between the co...
In this article we give a brief review of the fundamental physics that can be done with the future space-based gravitational wave detector LISA. This includes detection of gravitational wave bursts co...
A new framework for analyzing the effects of small scale inhomogeneities in cosmology
new framework effects of small scale inhomogeneities cosmology
2010/12/20
We develop a new, mathematically precise framework for treating the effects of nonlinear phe-
nomena occurring on small scales in general relativity. Our approach is an adaptation of Burnett’s formul...
A commonly adopted relational account of time evolution in generally-covariant systems, and more specifically in quantum cosmology, is argued to be unsatisfactory, insofar as it describes evolution re...
Spinfoam Cosmology: quantum cosmology from the full theory
Spinfoam Cosmology quantum cosmology full theory
2010/12/20
Quantum cosmology is usually studied quantizing symmetry-reduced variables. Is it possible, instead, to define quantum cosmology starting from the full quantum gravity theory?
An old Einstein - Eddington generalized gravity and modern ideas on branes and cosmology
old Einstein - Eddington generalized gravity modern ideas branes cosmology
2010/12/20
We briefly discuss new models of an ‘affine’ theory of gravity in multidimensional space-times with symmetric connections. We use and generalize Einstein’s proposal to specify the space-time geometry ...
Conformal cosmology with a positive effective gravitational constant
Conformal cosmology positive effective gravitational constant
2010/12/20
The conformal cosmological model presented by Mannheim predicts a negative value for the effective gravitational constant, Geff. It also involves a scalar field, S, which is treated classically.
On the measure problem in slow roll inflation and loop quantum cosmology
measure problem slow roll inflation loop quantum cosmology
2010/12/20
We consider the measure problem in standard slow-roll in ationary models from the perspective
of loop quantum cosmology (LQC).
Observational constraints on Chaplygin cosmology in a braneworld scenario with induced gravity and curvature effect
Cosmology Dark energy -Cosmology theory- Cosmology Observations
2010/12/21
We study cosmological dynamics and late-time evolution of an extended induced grav-ity braneworld scenario. In this scenario, curvature effects are taken into account via the
Gauss-Bonnet term in the...
Effective Theory in Spinfoam Cosmology: A First Order LQG-corrected FRW Cosmology and the Stiff Fluid
Effective Theory Spinfoam Cosmology First Order LQG-corrected FRW Cosmology Stiff Fluid
2010/12/20
We present an effective theory of a basic holomorphic spinfoam cosmology peaked on homoge-
neous isotropic metrics. The quantum-corrected Hamiltonian constraint of this effective theory is motivated ...
Real-time Cosmology
Real-time Cosmology
2010/12/21
In recent years the possibility of measuring the temporal change of radial and transverse position of sources in the sky in real time have become conceivable thanks to the thoroughly improved techniqu...
High-order quantum back-reaction and quantum cosmology with a positive cosmological constant
High-order quantum back-reaction quantum cosmology positive cosmological constant
2010/12/20
When quantum back-reaction by fluctuations, correlations and higher moments of a state becomes strong, semiclassical quantum mechanics resembles a dynamical system with a high-dimensional phase space....
Inflationary observables in loop quantum cosmology
Inflationary observables loop quantum cosmology
2010/12/20
The full set of cosmological observables coming from linear scalar and tensor perturbations of loop quantum cosmology is computed in the presence of inverse-volume corrections.
Path Integrals and the WKB approximation in Loop Quantum Cosmology
Path Integrals WKB approximation Loop Quantum Cosmology
2010/12/20
We follow the Feynman procedure to obtain a path integral formulation of loop quantum cosmology starting from the Hilbert space framework. Quantum geometry effects modify the weight associated with ea...