佩吉时间（英语：Page time）指的是当黑洞的熵只剩下初始值的一半，也就是当它的表面积变成只剩一半所需要花费的时间[1]。有时它亦指黑洞辐射的熵含量开始降低的瞬间。佩吉时间是以加拿大籍理论物理学家唐·佩吉的姓氏命名的[2]。
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