244 citations
- Hadassah Academic CollegeIL76 papers
- Hadassah Medical CenterIL4 papers
- Ben-Gurion University of the NegevIL3 papers
- Centre National de la Recherche ScientifiqueFR3 papers
- Tel Aviv UniversityIL3 papers
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- B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of UkraineUA1 paper
- Cavendish HospitalGB1 paper
11 papers · 2 filters
No-scalar-hair theorem for spherically symmetric reflecting stars
Shahar Hod
It is proved that spherically symmetric compact reflecting objects cannot support static bound-state configurations made of scalar fields whose self-interaction potential …
The spinning Kerr-black-hole-mirror bomb: A lower bound on the radius of the reflecting mirror
Shahar Hod
The intriguing superradiant amplification phenomenon allows an orbiting scalar field to extract rotational energy from a spinning Kerr black hole. Interestingly, the energy extract…
Analytic treatment of the system of a Kerr-Newman black hole and a charged massive scalar field
Shahar Hod
Charged rotating Kerr-Newman black holes are known to be superradiantly unstable to perturbations of charged massive bosonic fields whose proper frequencies lie in the bounded regi…
Upper bound on the center-of-mass energy of the collisional Penrose process
Shahar Hod
Following the interesting work of Bañados, Silk, and West [Phys. Rev. Lett. {\bf 103}, 111102 (2009)], it is repeatedly stated in the physics literature that the center-of-mass ene…
Slowly decaying resonances of charged massive scalar fields in the Reissner-Nordström black-hole spacetime
Shahar Hod
We determine the characteristic timescales associated with the linearized relaxation dynamics of the composed Reissner-Nordström-black-hole-charged-massive-scalar-field system. To…
Hawking radiation and the Stefan-Boltzmann law: The effective radius of the black-hole quantum atmosphere
Shahar Hod
It has recently been suggested [S. B. Giddings, Phys. Lett. B {\bf 754}, 39 (2016)] that the Hawking black-hole radiation spectrum originates from an effective quantum "atmosphere"…