11075073
Generalized Jaynes-Cummings model with an intensity-dependent coupling interacting with a quantum group-theoretic coherent state.
We present a generalized Jaynes-Cummings model (JCM) with an intensity-dependent coupling interacting with a quantum group-theoretic coherent state. The field operators of the JCM Hamiltonian are identified as the elements of the su(q)(1,1) quantum algebra in their Holstein-Primakoff realizations. We lay emphasis on the time evolution of field quadruatures and atomic population inversion of the generalized JCM. The revivals of radiation squeezing are obtained for any values of initial squeezing.
118845334
Inflation and primordial power spectra at anisotropic spacetime inspired by Planck’s constraints on isotropy of CMB
Recently, the Planck 2013 results showed possible evidence for a dipolar power modulation of the CMB temperature fluctuations at low-ℓ multipoles. This anomaly might imply certain deviations from statistical isotropy. To incorporate the Planck’s data into the standard cosmological model, we propose an inflation model of the very early universe in an anisotropic spacetime. A generalized Friedmann–Robertson–Walker (FRW) metric is presented in the Randers–Finsler spacetime. We obtain the primordial power spectrum of the scalar perturbation with direction dependence, such as the dipolar modulation. This is consistent with the dipolar power modulation of the CMB anisotropy signaled by the Planck observation.
118557445
Isometric group of $(\alpha,\beta)$-type Finsler space and the symmetry of Very Special Relativity
The Killing equation for a general Finsler space is set up. It is showed that the Killing equation of $(\alpha,\beta)$ space can be divided into two parts. One is the same with Killing equation of a Riemannian metric, another equation can be regarded as a constraint. The solutions of Killing equations present explicitly the isometric symmetry of Finsler space. We find that the isometric group of a special case of $(\alpha,\beta)$ space is the same with the symmetry of Very Special Relativity (VSR). The Killing vectors of Finsler-Funk space are given. Unlike Riemannian constant curvature space, the 4 dimensional Funk space with constant curvature just have 6 independent Killing vectors.
117201929
Possible modifications of the gravitational deflection of light
We investigate possible modifications on the gravitational deflection of light. Two forms of deformation of the Schwarzschild spacetime are proposed. The first ansatz is a given Finslerian line element; it could be regarded as a weak quantum gravity effect on the Schwarzschild spacetime. Starting from this ansatz, we deduce the deflection angle of the light ray which passes a weak gravitational source. The second ansatz could be regarded as a quantum vacuum effect on the Schwarzschild spacetime. The deflection angle of the light ray which passes a weak gravitational source is deduced in this Riemannian spacetime. This vacuum effect may distinguish the mixed light rays in the absence of gravitational source by a "spectroscope" (the gravitational source). The solutions of the gravitational field equation in this Riemannian spacetime imply this issue.
116890886
Holography and the Ads/CFT Correspondence
118861755
Constraints from Type IA Supernovae on {\lambda}-CDM Model in Randers-Finsler Space
Abstract Gravitational field equations in Randers-Finsler space of approximate Berwald type are investigated. A modified Friedmann equation and a new luminosity distance-redshift relation is proposed. A best-fit to the Type Ia supernovae (SNe) observations yields that the ΩΛ in the Λ-CDM model is suppressed to almost zero. This fact indicates that the astronomical observations on the Type Ia SNe can be described well without invoking any form of dark energy. The best-fit age of the universe is given. It is in agreement with the age of our galaxy.
2240754
Bifurcation and dynamical symmetry breaking in a renormalization-group-improved field theory.
We formulate the renormalization-group-improved theory for an m/sub r/not =0 (massive) QCD Lagrangian. The Green's functions are parametrized in terms of two renormalization-group--invariant quantities, M/sub 0/ and ..lambda../sub c/. The theory exhibits usual analyticity structure for every M/sub 0/>..lambda../sub c/e/sup 1/6/. In the limit M/sub 0/ = ..lambda../sub c/e/sup 1/6/, m/sub r/ becomes zero. The theory exhibits bifurcation in this limit, and chiral symmetry remains broken. is calculated in this limit.