In this paper, we extend Parikh＇ recent work to the Vaidya-de Sitter black hole which is non-stationary. We view Hawking radiation as a tunnelling process across the event horizon and calculate the tunnelling probabi...In this paper, we extend Parikh＇ recent work to the Vaidya-de Sitter black hole which is non-stationary. We view Hawking radiation as a tunnelling process across the event horizon and calculate the tunnelling probability when the particle crosses the event horizon. From the tunnelling probability we also find a leading correction to the semiclassical emission rate.展开更多
In this paper, we study the Hawking radiation via tunnelling from a uniformly accelerating black hole. Although the Bekenstein-Hawking entropy is proportional also to the area of the event horizon, the radius of it, r...In this paper, we study the Hawking radiation via tunnelling from a uniformly accelerating black hole. Although the Bekenstein-Hawking entropy is proportional also to the area of the event horizon, the radius of it, rH, is a function of 0, which leads to the difficulties in the calculation of the emission rate. In order to overcome the mathematical difficulties, we propose a new technique to calculate the emission rate and the result obtained is reasonable.展开更多
Silicon is an indirect semiconductor with a band-gap of 1.11 eV.Therefore,there isno optical recombination in bulk silicon in the visible region.Porous silicon(PS)preparedby anodic oxidation at constant current densit...Silicon is an indirect semiconductor with a band-gap of 1.11 eV.Therefore,there isno optical recombination in bulk silicon in the visible region.Porous silicon(PS)preparedby anodic oxidation at constant current density in HF solution has aroused great researchinterest since Canham reported its strong visible photoluminescence(PL)at roomtemperature in 1990.Many experimental results indicated that PL of PS is mainlyattributed to the quantum confinement effect(QCE)in PS layer.Unlike the lay-展开更多
基金Project supported by the National Natural Science Foundation of China （Grant Nos 10373003, 10475013 and the State Key Development for Basic Research of China （Grant No 2003CB716300）.Acknowledgement We would like to thank Guihua Tian for help.
文摘In this paper, we extend Parikh＇ recent work to the Vaidya-de Sitter black hole which is non-stationary. We view Hawking radiation as a tunnelling process across the event horizon and calculate the tunnelling probability when the particle crosses the event horizon. From the tunnelling probability we also find a leading correction to the semiclassical emission rate.
基金Project supported by the National Natural Science Foundation of China （Grant Nos 10373003, 10475013） and the State Key Development Program for Basic Research of China （Grant No 2003CB716300）.
文摘In this paper, we study the Hawking radiation via tunnelling from a uniformly accelerating black hole. Although the Bekenstein-Hawking entropy is proportional also to the area of the event horizon, the radius of it, rH, is a function of 0, which leads to the difficulties in the calculation of the emission rate. In order to overcome the mathematical difficulties, we propose a new technique to calculate the emission rate and the result obtained is reasonable.
基金Project supported by the National Natural Science Foundation of China.
文摘Silicon is an indirect semiconductor with a band-gap of 1.11 eV.Therefore,there isno optical recombination in bulk silicon in the visible region.Porous silicon(PS)preparedby anodic oxidation at constant current density in HF solution has aroused great researchinterest since Canham reported its strong visible photoluminescence(PL)at roomtemperature in 1990.Many experimental results indicated that PL of PS is mainlyattributed to the quantum confinement effect(QCE)in PS layer.Unlike the lay-
