Indeed, according to the Gauge–gravity duality conjecture, all microscopic processes in a black hole are reversible, and only the collective behavior is irreversible, as in any other macroscopic, thermal system.
甚至，根据規範-引力二象性（英语：String theory#Gauge-gravity duality）猜想，在一个黑洞里的所有微观过程是可逆的，而只有集体行为是不可逆的，就像其他宏观热力学系统一样。