2024/11/22(Fri) 10:30 -12:00 五樓第一會議室 5F, 1st Meeting Room
Title
Black Hole as a Gravity Condensate from Entropy Maximization
Speaker
Dr. Yuki Yokokura (iTHEMS, RIKEN)Abstract
The identity of a black hole is still mysterious theoretically and observationally. As one candidate for the quantum definition of black holes, we propose that the black hole is the configuration that maximizes the thermodynamic entropy for a fixed surface area. As a first step, we explore this possibility in the 4D semi-classical Einstein equation, and reach a picture that the black hole is a gravitational condensate of many excited quanta with the maximum entropy. The entropy of the interior quanta agrees with the entropy-area law; a strong pressure induced by quantum fluctuations resolves the singularity; and the configuration has a surface (instead of a horizon) but generates, through the strong time delay, almost the same imaging as a classical black hole. Therefore, the true identity of a black hole can be the gravity condensate. We finally discuss a possibility of describing the gravity condensate as a quantum liquid of “spacetime atoms”.
Language
演講語言 (Language): in English