Results 31 to 40 of about 238,679 (287)

Quantum focusing conjecture and the Page curve

Journal of High Energy Physics, 2023
The focusing theorem fails for evaporating black holes because the null energy condition is violated by quantum effects. The quantum focusing conjecture is proposed so that it is satisfied even if the null energy condition is violated.
Yoshinori Matsuo
doaj   +1 more source

Quantum effects in gravitational wave signals from cuspy superstrings [PDF]

, 2006
We study the gravitational emission, in Superstring Theory, from fundamental strings exhibiting cusps. The classical computation of the gravitational radiation signal from cuspy strings features strong bursts in the special null directions associated to ...
Chialva D, Copeland E J, Diego Chialva, Dvali G, Firouzjahi H, Iengo R, Itzykson C, Kachru S, Lommen A N, Lommen A N, Polchinski J, Thibault Damour, Vanchurin V Olum K D Vilenkin A, Vilenkin A, Vilenkin A   +14 more
core   +2 more sources

Novel Multi-Band SIW Antenna with Filtering Function [PDF]

Journal of Electromagnetic Engineering and Science
In this paper, the basic structure of a quad-band substrate-integrated waveguide (SIW) antenna with filtering characteristics is proposed. The proposed antenna consists of a four-slot SIW and a single-probe feed. Despite having a single feed, it was able
Youngje Sung
doaj   +1 more source

Binary black hole coalescence in the large-mass-ratio limit: the hyperboloidal layer method and waveforms at null infinity [PDF]

, 2011
We compute and analyze the gravitational waveform emitted to future null infinity by a system of two black holes in the large mass ratio limit. We consider the transition from the quasi-adiabatic inspiral to plunge, merger, and ringdown.
A. Buonanno, A. Nagar, Alessandro Nagar, Anıl Zenginoğlu, B. Sathyaprakash, B. G. Schmidt, J. Frauendiener, L. Blanchet, Sebastiano Bernuzzi   +8 more
core   +3 more sources

Black Hole Radiation (with and) without Weyl Anomaly [PDF]

, 1995
In the semiclassical analysis of black hole radiation in matter-coupled dilaton gravity, a one-parameter ``$k$"-family of measures for the path integral quantization of the matter fields is considered. The Weyl anomaly is proportional to the parameter $k$
Amelino-Camelia G, Bilal A, Bonora L, D Seminara, David F, Distler J, G Amelino-Camelia, Griguolo L, Hawking S W, Itzykson C, Jackiw R, Jackiw R, Knizhnik V, Polyakov A M, Polyakov A M, Strominger A   +15 more
core   +2 more sources

Synchrotron X-Ray Radiation-Induced Bystander Effect: An Impact of the Scattered Radiation, Distance From the Irradiated Site and p53 Cell Status

Frontiers in Oncology, 2021
Synchrotron radiation, especially microbeam radiotherapy (MRT), has a great potential to improve cancer radiotherapy, but non-targeted effects of synchrotron radiation have not yet been sufficiently explored.
Pavel Lobachevsky, Pavel Lobachevsky, Helen B. Forrester, Helen B. Forrester, Helen B. Forrester, Alesia Ivashkevich, Alesia Ivashkevich, Joel Mason, Joel Mason, Andrew W. Stevenson, Andrew W. Stevenson, Chris J. Hall, Carl N. Sprung, Carl N. Sprung, Valentin G. Djonov, Olga A. Martin, Olga A. Martin, Olga A. Martin   +17 more
doaj   +1 more source

Classical soft graviton theorem rewritten

Journal of High Energy Physics, 2022
Classical soft graviton theorem gives the gravitational wave-form at future null infinity at late retarded time u for a general classical scattering. The large u expansion has three known universal terms: the constant term, the term proportional to 1/u ...
Biswajit Sahoo, Ashoke Sen
doaj   +1 more source

Hawking Radiation and Unitary evolution [PDF]

, 1995
We find a family of exact solutions to the semi-classical equations (including back-reaction) of two-dimensional dilaton gravity, describing infalling null matter that becomes outgoing and returns to infinity without forming a black hole.
A Miković, A. Bilal, A. Strominger, C. Callan, C. Holzhey, C. R. Stephens, E. Witten, H. J. Bremermann, J. D. Bekenstein, J. Russo, L. B. Levitin, L. Parker, Leonard Parker, P. C. W. Davies, R. B. Carlitz, R. M. Wald, S. A. Fulling, S. Bose, S. P. deAlwis, S. R. Das, Sukanta Bose, T. Chung, T. Fiola, Y. Peleg, Yoav Peleg   +24 more
core   +2 more sources

A Dual-Band Patch Antenna with Combined Self-Decoupling and Filtering Properties and Its Application in Dual/Squad-Band Two-Element MIMO Array

Sensors
This paper proposes a dual-band patch antenna with combined self-decoupling and filtering properties, designed to suppress mutual coupling between two antenna elements both within the same dual-band and across different dual-bands. Initially, a dual-band
Jun-Yi Lv, Jun-Ming Zhang, Peng-Fei Lv, Li-Xin Xu   +3 more
doaj   +1 more source

Radiating stars with composite matter distributions

European Physical Journal C: Particles and Fields, 2021
In this paper we study the junction conditions for a generalised matter distribution in a radiating star. The internal matter distribution is a composite distribution consisting of barotropic matter, null dust and a null string fluid in a shear-free ...
Sunil D. Maharaj, Byron P. Brassel
doaj   +1 more source