73 citations
- Rikkyo UniversityJP7 papers
- National Astronomical Observatory of JapanJP5 papers
- Tohoku UniversityJP4 papers
- National Institute of Information and Communications TechnologyJP3 papers
- Kyoto UniversityJP2 papers
- Kyushu UniversityJP2 papers
- Sumitomo Mitsui Banking CorporationJP2 papers
- Xi'an Jiaotong UniversityCN2 papers
- Advanced Photon Source1 paper
- Argonne National LaboratoryUS1 paper
- Brookhaven National LaboratoryUS1 paper
- Chuo UniversityJP1 paper
4 papers · 1 filter
Escape probability of the super-Penrose process
Kota Ogasawara, Tomohiro Harada, Umpei Miyamoto +1
We consider a head-on collision of two massive particles that move in the equatorial plane of an extremal Kerr black hole, which results in the production of two massless particles…
A full-vortex flux qubit for charged particle optics
Hiroshi Okamoto
We introduce a design of a superconducting flux qubit capable of holding a full magnetic flux quantum , which arguably is an essential property for applications in charged p…
Consistent analytic approach to the efficiency of collisional Penrose process
Tomohiro Harada, Kota Ogasawara, Umpei Miyamoto
We propose a consistent analytic approach to the efficiency of collisional Penrose process in the vicinity of a maximally rotating Kerr black hole. We focus on a collision with arb…
Vacuum excitation by sudden appearance and disappearance of a Dirichlet wall in a cavity
Tomohiro Harada, Shunichiro Kinoshita, Umpei Miyamoto
Vacuum excitation by time-varying boundary conditions is not only of fundamental importance but also has recently been confirmed in a laboratory experiment. In this paper, we study…