Detecting rotational superradiance in fluid laboratories
Rotational superradiance was predicted theoretically decades ago, and is chiefly responsible for a number of important effects and phenomenology in black-hole physics. However, rotational superradiance has never been observed experimentally. Here, with the aim of probing superradiance in the lab, we...
| Main Authors: | , , , |
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| Format: | Article |
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American Physical Society
2016
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| Online Access: | https://eprints.nottingham.ac.uk/40855/ |
| _version_ | 1848796147849625600 |
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| author | Cardoso, Vitor Coutant, Antonin Richartz, Mauricio Weinfurtner, Silke |
| author_facet | Cardoso, Vitor Coutant, Antonin Richartz, Mauricio Weinfurtner, Silke |
| author_sort | Cardoso, Vitor |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Rotational superradiance was predicted theoretically decades ago, and is chiefly responsible for a number of important effects and phenomenology in black-hole physics. However, rotational superradiance has never been observed experimentally. Here, with the aim of probing superradiance in the lab, we investigate the behavior of sound and surface waves in fluids resting in a circular basin at the center of which a rotating cylinder is placed. We show that with a suitable choice for the material of the cylinder, surface and sound waves are amplified. Two types of instabilities are studied: one sets in whenever superradiant modes are confined near the rotating cylinder and the other, which does not rely on confinement, corresponds to a local excitation of the cylinder. Our findings are experimentally testable in existing fluid laboratories and, hence, offer experimental exploration and comparison of dynamical instabilities arising from rapidly rotating boundary layers in astrophysical as well as in fluid dynamical systems. |
| first_indexed | 2025-11-14T19:43:22Z |
| format | Article |
| id | nottingham-40855 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:43:22Z |
| publishDate | 2016 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-408552020-05-04T18:24:00Z https://eprints.nottingham.ac.uk/40855/ Detecting rotational superradiance in fluid laboratories Cardoso, Vitor Coutant, Antonin Richartz, Mauricio Weinfurtner, Silke Rotational superradiance was predicted theoretically decades ago, and is chiefly responsible for a number of important effects and phenomenology in black-hole physics. However, rotational superradiance has never been observed experimentally. Here, with the aim of probing superradiance in the lab, we investigate the behavior of sound and surface waves in fluids resting in a circular basin at the center of which a rotating cylinder is placed. We show that with a suitable choice for the material of the cylinder, surface and sound waves are amplified. Two types of instabilities are studied: one sets in whenever superradiant modes are confined near the rotating cylinder and the other, which does not rely on confinement, corresponds to a local excitation of the cylinder. Our findings are experimentally testable in existing fluid laboratories and, hence, offer experimental exploration and comparison of dynamical instabilities arising from rapidly rotating boundary layers in astrophysical as well as in fluid dynamical systems. American Physical Society 2016-12-29 Article PeerReviewed Cardoso, Vitor, Coutant, Antonin, Richartz, Mauricio and Weinfurtner, Silke (2016) Detecting rotational superradiance in fluid laboratories. Physical Review Letters, 117 (27). 271101/1-271101/6. ISSN 1079-7114 http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.271101 doi:10.1103/PhysRevLett.117.271101 doi:10.1103/PhysRevLett.117.271101 |
| spellingShingle | Cardoso, Vitor Coutant, Antonin Richartz, Mauricio Weinfurtner, Silke Detecting rotational superradiance in fluid laboratories |
| title | Detecting rotational superradiance in fluid laboratories |
| title_full | Detecting rotational superradiance in fluid laboratories |
| title_fullStr | Detecting rotational superradiance in fluid laboratories |
| title_full_unstemmed | Detecting rotational superradiance in fluid laboratories |
| title_short | Detecting rotational superradiance in fluid laboratories |
| title_sort | detecting rotational superradiance in fluid laboratories |
| url | https://eprints.nottingham.ac.uk/40855/ https://eprints.nottingham.ac.uk/40855/ https://eprints.nottingham.ac.uk/40855/ |