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작성자 CQUeST 날짜 2018-12-20
제목 [Seminar] Dec. 21(Fri), 4::00 pm, Inyong Park

DATE & TIME   Dec. 21 (Fri), 4:00 pm
PLACE   R1029
SPEAKER   Inyoung Park
HOST   Wonwoo Lee
INSTITUTE   Philander Smith College
TITLE A Potential application of quantum gravity: gravitational echoes

 Conventionally the quasi-normal modes are obtained with the so-called perfectly infall boundary conditions at the event horizon of a black hole. A series of the recent developments (such as Fuzzy ball or Firewall) suggests that the true picture of the event horizon may be quite different from that based on semi-classical physics. This raises a possibility that the perfectly infall boundary may need to be modified allowing reflection, the ``echoes", from the event horizon. The purpose of the talk is to introduce the echo proposal and the tool necessary to tackle it, the Teukolsky equation.

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