PIRSA:18020092

Microscopic structure of quantum black holes

Oshita, N. (2018). Microscopic structure of quantum black holes. Perimeter Institute. https://pirsa.org/18020092

Oshita, Naritaka. Microscopic structure of quantum black holes. Perimeter Institute, Feb. 06, 2018, https://pirsa.org/18020092 

          @misc{ pirsa_PIRSA:18020092,
            doi = {10.48660/18020092},
            url = {https://pirsa.org/18020092},
            author = {Oshita, Naritaka},
            keywords = {Cosmology},
            language = {en},
            title = {Microscopic structure of quantum black holes},
            publisher = {Perimeter Institute},
            year = {2018},
            month = {feb},
            note = {PIRSA:18020092 see, \url{https://pirsa.org}}
          }

Naritaka Oshita Kyoto University

DOI 10.48660/18020092
Collection
Talk Type Scientific Series
Subject

Abstract

If a black hole horizon has its microscopic structure as is conjectured by the candidates of quantum gravity, the dispersion relation of gravitational waves (GWs) near the horizon may be drastically modified since its wavelength can be comparable to the size of the microscopic structure because of its infinite gravitational blue-shift near the horizon.  We investigate ringdown-GWs from a perturbed black hole with such a modified dispersion relation and found that the change of modified dispersion relation near the horizon would lead to the partial reflection of infalling GWs at the horizon and echo-signals may appear in the late-time of ringdown-GWs. This implies that the echoes can be a supporting evidence of the existence of microscopic degrees of freedom on black hole horizons.