We improve the brick-wall model to take only the contribution of a thin film near the event horizon into account.This improvement not only gives us a satisfactory result,but also avoids some drawbacks in the original ...We improve the brick-wall model to take only the contribution of a thin film near the event horizon into account.This improvement not only gives us a satisfactory result,but also avoids some drawbacks in the original brick-wall method such as the little mass approximation,neglecting logarithm term,and taking the term L3 as the contribution of the vacuum surrounding a black hole.It is found that there is an intrinsic relation between the event horizon and the entropy.The event horizon is the characteristic of a black hole,so the entropy calculating of a black hole is also naturally related to its horizon.展开更多
The Casimir energy of massive scalar field with hybrid （Diriehlet-Neumann） boundary condition is calculated. In order to regularize the model, the typical methods named as mode summation method and Green＇s function...The Casimir energy of massive scalar field with hybrid （Diriehlet-Neumann） boundary condition is calculated. In order to regularize the model, the typical methods named as mode summation method and Green＇s function method are used respectively. It is found that the regularized zero-point energy density depends on the scalar field＇s mass. When the field is massless, the result is consistent with previous literatures.展开更多
A new formulation of the Bekenstein-Smarr formula of a Kerr-Newman black hole is given. The re-defined black hole entropy continuously goes to zero as the black hole temperature approaches absolute zero, which satisfi...A new formulation of the Bekenstein-Smarr formula of a Kerr-Newman black hole is given. The re-defined black hole entropy continuously goes to zero as the black hole temperature approaches absolute zero, which satisfies the Nernst theorem. Our new result suggests that the Kerr-Newman black hole should be regarded as a composite thermodynamic system composed of two sub-systems, its outer horizon and its inner horizon. There exists a new quantum thermal effect. “Hawking absorption”, near the inner horizon of the black hole.展开更多
The Casimir effect has been studied for various quantum fields in both fiat and curved spacetimes. As a further step along this line, we provide an explicit derivation of Casimlr effect for massless spin-3/2 field wit...The Casimir effect has been studied for various quantum fields in both fiat and curved spacetimes. As a further step along this line, we provide an explicit derivation of Casimlr effect for massless spin-3/2 field with periodic boundary condition imposed in four-dimensional Minkowski spacetime. The corresponding results with Dirichlet and Neumann boundary conditions are also discussed.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.19773003the Research Fund for Doctoral Program of Higher Education under Grant No.96002701.
文摘We improve the brick-wall model to take only the contribution of a thin film near the event horizon into account.This improvement not only gives us a satisfactory result,but also avoids some drawbacks in the original brick-wall method such as the little mass approximation,neglecting logarithm term,and taking the term L3 as the contribution of the vacuum surrounding a black hole.It is found that there is an intrinsic relation between the event horizon and the entropy.The event horizon is the characteristic of a black hole,so the entropy calculating of a black hole is also naturally related to its horizon.
基金supported by National Natural Science Foundation of China under Grant Nos.10773002 and 10875012the National Fundamental Research Program of China under Grant No.2003CB716302
文摘The Casimir energy of massive scalar field with hybrid （Diriehlet-Neumann） boundary condition is calculated. In order to regularize the model, the typical methods named as mode summation method and Green＇s function method are used respectively. It is found that the regularized zero-point energy density depends on the scalar field＇s mass. When the field is massless, the result is consistent with previous literatures.
基金the National Natural Science Foundation of China under Grant No.19773003。
文摘A new formulation of the Bekenstein-Smarr formula of a Kerr-Newman black hole is given. The re-defined black hole entropy continuously goes to zero as the black hole temperature approaches absolute zero, which satisfies the Nernst theorem. Our new result suggests that the Kerr-Newman black hole should be regarded as a composite thermodynamic system composed of two sub-systems, its outer horizon and its inner horizon. There exists a new quantum thermal effect. “Hawking absorption”, near the inner horizon of the black hole.
基金The project supported partly by National Natural Science Foundation of China under Grant Nos. 10373003, 10475013, and NBRPC under Grant No. 2003CB716302
文摘The Casimir effect has been studied for various quantum fields in both fiat and curved spacetimes. As a further step along this line, we provide an explicit derivation of Casimlr effect for massless spin-3/2 field with periodic boundary condition imposed in four-dimensional Minkowski spacetime. The corresponding results with Dirichlet and Neumann boundary conditions are also discussed.
