Hui-ng Li

Fermion tunneling from a Vaidya black hole

In this paper, we investigate the fermion tunneling through the event horizon of a Vaidya black hole which is non-stationary. We further take into account the particles self-gravitation in the dynamical background space-time, and calculate the tunneling probability. The result shows that the tunneling probability is related not only to the change of Bekenstein-Hawking entropy but also to the integral of the changing horizon, which is different from the case of stationary black holes.

Tunneling radiation of Dirac particles from Lifshitz black holes in higher-derivative gravity theory

We investigate the Dirac particles tunneling of Lifshitz black holes in four-dimensional and five-dimensional higher-derivative gravity. These black holes have been argued to have zero entropy and mass, but non-zero temperature. Since a black hole has a well-defined temperature it can radiate any types of particle at that temperature. In this letter, we attempt to apply the tunneling method to derive the Hawking radiation of Dirac particles and confirm that these black holes can really emit radiation at the Hawking temperature.

Dirac particles' tunneling from a rotating Kaluza-Klein black hole with squashed horizons

In this letter, we attempt to generalize the tunneling method to derive the Hawking radiation of a Dirac particle from a rotating Kaluza-Klein (KK) black hole with squashed horizons. As a result, the tunneling probability and Hawking temperature of the black hole is successfully recovered. The results also show that the Hawking temperature of the black hole is not related to the kind of emitted particles.

Fermion tunneling from the 5-dimensional Kerr-Gödel black hole

By constructing a set of appropriate matrices γμ for the 5-dimensional Kerr-Godel black hole, we attempt to extend Kerner-Manns fermion tunneling method to investigate the fermion Hawking radiation across the horizon, and the expected Hawking temperature is correctly recovered, which is exactly the same as that obtained by other methods.

DISCUSSION ON THE CHARACTERISTICS OF THE QUANTUM TUNNELING RADIATION OF GLOBAL MONOPOLE CHARGED BLACK HOLE

Considering energy conservation, adopting KKW method, the tunneling effect of global monopole charged black hole was deeply studied. The result shows that the emission of particle on the event horizon relates to the change of Bekenstein–Hawking entropy and the spectrum is not pure thermal. Moreover, the corrections to the entropy and temperature of the black hole are presented.

Formation of the remnant close to Planck scale and the Schwarzschild black hole with global monopole

The Poincaré invariance of GR is usually interpreted as Lorentz invariance plus diffeomorphism invariance. In this paper, by introducing the local inertial coordinates (LIC), it is shown that a theory with Lorentz and diffeomorphism invariance is not necessarily Poincaré invariant. Actually, the energy-momentum conservation is violated there. On the other hand, with the help of the LIC, the Poincaré invariance is reinterpreted as an internal symmetry. In this formalism, the conservation law is derived, which has not been sufficiently explored before. PACS numbers: 04.50.Kd, 04.20.Cv, 03.50.-z

Correction to Hawking radiation of the stationary axisymmetric NUT-Taub black hole

Adopting a new method of quantum radiation as tunnelling, and taking energy conservation into account, the tunnelling radiation characteristics of the stationary axial symmetric NUT-Taub black hole are studied. The result shows that the tunnelling rate of particles at the event horizon of the black hole is relevant to Bekenstein–Hawking entropy and the real spectrum is not precisely thermal at all.