I read that right at the moment of big bang, time and space are created and there is only quantum fluctuation, so there should be no temperature because photon and many elementary particles did not yet exist until a fraction of second later. But I like to know that during this earliest epoch, why temperature becomes so hot in the first place? I'm imagining hawking radiation because I think the condition at the moment of big bang resembles micro black hole only different the latter explodes rather than balloons as it evaporate.


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