{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,4]],"date-time":"2025-11-04T16:08:49Z","timestamp":1762272529697,"version":"build-2065373602"},"reference-count":28,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2020,3,5]],"date-time":"2020-03-05T00:00:00Z","timestamp":1583366400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004487","name":"Research Institute for Astronomy and Astrophysics of Maragha","doi-asserted-by":"publisher","award":["To be added"],"award-info":[{"award-number":["To be added"]}],"id":[{"id":"10.13039\/501100004487","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>Black hole (BH) collisions produce gravitational radiation which is generally thought, in a quantum limit, to be gravitons. The stretched horizon of a black hole contains quantum information, or a form of quantum hair, which is a coalescence of black holes participating in the generation of gravitons. This may be facilitated with a Bohr-like approach to black hole (BH) quantum physics with quasi-normal mode (QNM) approach to BH quantum mechanics. Quantum gravity and quantum hair on event horizons is excited to higher energy in BH coalescence. The near horizon condition for two BHs right before collision is a deformed     A d S     spacetime. These excited states of BH quantum hair then relax with the production of gravitons. This is then argued to define RT entropy given by quantum hair on the horizons. These qubits of information from a BH coalescence should then appear in gravitational wave (GW) data.<\/jats:p>","DOI":"10.3390\/e22030301","type":"journal-article","created":{"date-parts":[[2020,3,6]],"date-time":"2020-03-06T07:33:46Z","timestamp":1583480026000},"page":"301","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Quantum Hair on Colliding Black Holes"],"prefix":"10.3390","volume":"22","author":[{"given":"Lawrence","family":"Crowell","sequence":"first","affiliation":[{"name":"AIAS, Budapest 1011, Hungary"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1999-4503","authenticated-orcid":false,"given":"Christian","family":"Corda","sequence":"additional","affiliation":[{"name":"Department of Physics, Faculty of Science, Istanbul University, Istanbul 34134, Turkey"},{"name":"International Institute for Applicable Mathematics and Information Sciences, B.M., Birla Science Centre, Adarshnagar, Hyderabad 500063, India"}]}],"member":"1968","published-online":{"date-parts":[[2020,3,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"287","DOI":"10.1103\/PhysRevD.23.287","article-title":"Universal upper bound on the entropy-to-energy ratio for bounded systems","volume":"23","author":"Bekenstein","year":"1981","journal-title":"Phys. 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