共查询到20条相似文献,搜索用时 250 毫秒
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采用薄层模型brick-wall方法,计算了一般球对称带电蒸发黑洞Dirac场的熵,通过适当选择时间依赖的截断因子,仍可得出黑洞熵与视界面积成正比的结论.
关键词:
熵
蒸发黑洞
薄层模型
Dirac场
Dirac方程 相似文献
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利用改进后的薄膜brick-wall模型,计算了动态广义球对称含荷黑洞Dirac场的熵.按薄层模型的观点,在视界附近薄场上的熵就是黑洞的熵.计算结果表明所得到的黑洞熵与其视界面积成正比.
关键词:
黑洞
薄膜brick-wall模型
熵
Dirac场 相似文献
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利用薄层(改进的brick-wall模型),通过分别求解标量场方程和Dirac场方程,计算了环面黑洞事件视界附近的标量场和Dirac场的量子统计熵.按薄层模型的观点,在视界面附近薄层上的量子场的熵就是黑洞的熵.结果表明,黑洞熵正比于事件视界的面积,遵循Beken-stein-Hawking面积熵公式.
关键词:
熵
环面黑洞
薄层模型
量子场 相似文献
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采用Tortoise坐标变换,约化视界面附近Dirac场方程,得到Kinnersley黑洞的Hawking温度.用薄膜brick-wall模型,计算Kinnersley黑洞的熵,得到通过选择适当的截断因子和薄层,在视界面附近薄层上的熵就是黑洞的熵,结果表明黑洞熵与视界面积成正比. 相似文献
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A single particle obeys the Dirac equation in spatial dimensions and is bound by an attractive central monotone potential that vanishes at infinity. In one dimension, the potential is even, and monotone for The asymptotic behavior of the wave functions near the origin and at infinity are discussed. Nodal theorems are proven for the cases and , which specify the relationship between the numbers of nodes n1 and n2 in the upper and lower components of the Dirac spinor. For , whereas for if and if where and This work generalizes the classic results of Rose and Newton in 1951 for the case Specific examples are presented with graphs, including Dirac spinor orbits 相似文献
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研究当存在边界的情形下 Dirac场的正则量子化问题. 采用文献[1]的观点, 将边界条件当作Dirac初级约束.与已有研究不同的是, 本文从离散的角度研究此问题. 将Dirac场的拉氏量和内在约束进行离散化, 并且将离散的边界条件当作初级Dirac约束. 因此, 从约束的起源来看, 这个模型中存在两种不同的约束: 一种是由于模型的奇异性而带来的约束, 即内在约束; 另一种是边界条件. 在对此模型进行正则量子化过程中提出一种能够平等地处理内在约束和边界条件的方法. 为了证明该方法能够平等地对待这两种起源不同的约束, 在计算Dirac 括号时分别选取了两个不同的子集合来构造"中间Dirac括号", 最后得到了相同的结果.
关键词:
边界条件
Dirac约束
Dirac括号 相似文献
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Antonio Zecca 《General Relativity and Gravitation》2000,32(7):1197-1206
The Dirac equation is studied for a sufficiently large class of Lematre—Tolman—Bondi cosmological models. While the angular equation (whose solution is known) separates directly, the spatial and temporal dependence de-couples only after a suitable separation procedure. The separated time equation is integrated by series. The separated spatial equation still depends on an arbitrary function relative to the integration of the cosmological model. 相似文献
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An estimate for the first eigenvalue of the Dirac operator on compact Riemannian spin manifold of positive scalar curvature admitting a parallel one-form is found. The possible universal covering spaces of the manifolds on which the smalles possible eigenvalue is attained are also listed. Moreover, a complete classification of the compact odd-dimensional manifolds whose universal covering space is Sn−1 ×
is given in the limiting case. All such manifolds are diffeomorphic but not necessarily isometric to Sn−1 × S1. 相似文献
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This paper aims to solve the radial parts of Dirac equation between the inner and the outer horizon in Schwarzschild–de Sitter geometry numerically. A logarithm approximation which almost has the same nature with the modified tortoise coordinate r* even close to the two horizons is found. It is used to replace the modified tortoise coordinate r*, this leads to a simple analytically invertible relation between r* and the radius r. Then, the potential V (r*) is replaced by a collection of step functions. By a quantum mechanical method, the solution of the wave equation as well as the reflection and transmission coefficients are computed. The resulting wave turns out to be not close to that of a harmonic wave globally. 相似文献
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A relativistic analysis of p +40Ca elastic scattering with different nuclear ground state target densities at 135 to 200 MeV is presented in this paper. It
is found that the IGO densities are more consistent in reproducing the data over the energy range considered here. The reproduction
of spin-rotation-function data with the simultaneous fitting of differential cross-section and analyzing power, and the appearance
of wine-bottle-bottom shaped Re Ueff(r) in the transition energy region, sensitively depends on the input nuclear ground state densities and are not solely the
relativistic characteristic signatures. We also found that the wine-bottle-bottom shaped Re Ueff (r) is preferred by the spin observables in the transition energy region (i.e. 181 MeV to 200 MeV) 相似文献
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The multi-configuration Dirac-Fock method is used in this work to calculate ground-state ionization potentials of Boron and Carbon isoelectronic sequences from Z = 6 to Z=42. And the contribution of relativistic corrections, nuclear volume effect, Breit and QED effects to tile results is discussed in the calculation. The results are compared with the scanty existing theoretical and experimental data in the literature and good agreements are achieved. Then analytical expressions of lonization potential along Boron and Carbon isoelectronic sequences are obtained. 相似文献