共查询到20条相似文献,搜索用时 15 毫秒
1.
In this paper, the HMO model of scalar field in vacuum is developed using the covariant field theory, in which the so-called current density and mass density of optical fluid are obtained and analyzed. 相似文献
2.
In this paper, the HMO model of scalar field in medium is presented using the general covariant classical theory of scalar field in medium, which is regarded as a curved space-time represented by optical metric model (OMM) and the case of self-focusing is discussed. 相似文献
3.
WANG Gang 《Chinese Journal of Lasers》1994,3(6):529-532
Relativistic aspects of HMO¥WANGGang(PhysicsDepartmenf,UniyersityofElecfronicScience andTechnologyofChina,Cbongdu610054,China... 相似文献
4.
Understanding mechanisms capable of altering the vacuum energy is currently of interest in field theories and cosmology. We consider an interacting scalar field and show that the vacuum energy naturally takes any value between its maximum and zero because interaction affects the number of operating field modes, the assertion that involves no assumptions or postulates. The mechanism is similar to the recently discussed temperature evolution of collective modes in liquids. The cosmological implication concerns the evolution of scalar field ? during the inflation of the Universe. ? starts with all field modes operating and maximal vacuum energy in the early inflation-dominated epoch. As a result of inflation, ? undergoes a dynamical crossover and arrives in the state with one long-wavelength longitudinal mode and small positive vacuum energy predicted to be asymptotically decreasing to zero in the late epoch. Accordingly, we predict that the currently observed cosmological constant will decrease in the future, and comment on the possibility of a cyclic Universe. 相似文献
5.
6.
7.
8.
利用毕奥萨伐尔定律,通过对EAST内部等离子体电流的运动状态的研究,建立了EAST内部的磁场数学模型,并利用Matlab对实验数据的拟合分析,对模型进行了分析验证。通过误差分析,进而改进模型,研究表明改进后的模型与实验数据能较好吻合,误差较小。相关研究和结论对托卡马克真空室内磁场测量具有一定的指导意义,为进一步研究基于MEMS技术的超导托卡马克装置电磁测量诊断系统的微纳磁敏传感器奠定理论基础。 相似文献
9.
DynamicanalysisofopticalfluidinmediumGUOHong;ZHUShitong;DENGXiming(NationalLaboratoryonHighPowerLaserandPhysics,ShanghaiInsti... 相似文献
10.
利用毕奥萨伐尔定律,通过对EAST内部等离子体电流的运动状态的研究,建立了EAST内部的磁场数学模型,并利用Matlab对实验数据的拟合分析,对模型进行了分析验证.通过误差分析,进而改进模型,研究表明改进后的模型与实验数据能较好吻合,误差较小.相关研究和结论对托卡马克真空室内磁场测量具有一定的指导意义,为进一步研究基于MEMS技术的超导托卡马克装置电磁测量诊断系统的微纳磁敏传感器奠定理论基础. 相似文献
11.
12.
For a quantum field theory with interacting scalar fields treated in light-cone quantisation (LCQ) it is shown that the vacuum of the theory is always the perturbative vacuum. The fields can be split up into classical constant fields, determined by minima of the effective action, and quantum fields. The former ones replace the nontrivial vacuum expectation values of the conventionally quantised theory. When spontaneous symmetry breaking occurs, the classical fields are only determined up to symmetry transformations. This degeneracy corresponds to the degeneracy of the vacuum in the conventional approach. The effective actions of the conventional theory and LCQ are identical. Lightcone charges obey the canonical commutation relations with the fields and the canonical charge algebra relations. Ward identities and the appearance of Goldstone Bosons accompanying spontaneous symmetry breaking can be derived in analogy to the conventional case. 相似文献
13.
The renormalization group equation is formulated for the vacuum energy of a scalar field. We calculate the two-loop functions and study the asymptotic behavior of the vacuum energy. 相似文献
14.
N. Van Den Bergh 《General Relativity and Gravitation》1982,14(1):17-25
A conformai technique is given for the generation of exact solutions for the spherically symmetric vacuum field in the general Bergmann-Wagoner-Nordtvedt scalar-tensory theory with vanishing cosmological constant. We discuss in particular the solution for Schwinger's theory and for models with
n coupling or with curvature coupling. It appears that all theories with vanishing cosmological term lead to the presence of naked singularities. 相似文献
15.
16.
HMOinnonlinearopticsGUOHong;LINTao;WANGGang;DENGXiming(NationalLaboratoryonHighPowerAuserandPhysics,ShanghaiInstituteofOptics... 相似文献
17.
HMO in study on diffraction-free beams¥GUOHong;LINTao;WANGGang;DENGXiming(NationallaboratoryonHighPowerarserandPhysics,Shangh... 相似文献
18.
19.
<正>The scattering of scalar light wave from a random medium with a correlation function of Gaussian-Schell model distribution is studied.It is shown that the properties of the scattered field,i.e.,the spectral density and the spectral degree of coherence of the scattered field,are closely related to the properties of the scattering medium,including the scaled effective radius and the scaled correlation length of the correlation function. 相似文献
20.