64 citations · 188 across the 15 of their papers we have counts for
6 papers · 1 filter
Lensing of Dirac monopole in Berry's phase
Kazuo Fujikawa, Koichiro Umetsu
Berry's phase, which is associated with the slow cyclic motion with a finite period, looks like a Dirac monopole when seen from far away but smoothly changes to a dipole near the l…
Hawking radiation as tunneling from squashed Kaluza-Klein black hole
Ken Matsuno, Koichiro Umetsu
We discuss Hawking radiation from a five-dimensional squashed Kaluza-Klein black hole on the basis of the tunneling mechanism. A simple manner, which was recently suggested by Umet…
Tunneling Mechanism in Kerr-Newman Black Hole and Dimensional Reduction near the Horizon
Koichiro Umetsu
It is shown that the derivation of the Hawking radiation from a rotating black hole on the basis of the tunneling mechanism is greatly simplified by using the technique of the dime…
Recent Attempts in the Analysis of Black Hole Radiation
Koichiro Umetsu
In this thesis, we first present a brief review of black hole radiation which is commonly called Hawking radiation. The existence of Hawking radiation by itself is well established…
Hawking Radiation from Kerr-Newman Black Hole and Tunneling Mechanism
Koichiro Umetsu
We present the derivation of Hawking radiation by using the tunneling mechanism in a rotating and charged black hole background. We show that the 4-dimensional Kerr-Newman metric,…
Ward Identities in the Derivation of Hawking Radiation from Anomalies
Koichiro Umetsu
Robinson and Wilczek suggested a new method of deriving Hawking radiation by the consideration of anomalies. The basic idea of their approach is that the flux of Hawking radiation…