bjg1492 t1_ivsmfq2 wrote
Reply to comment by SequencedLife in A first-of-its-kind experiment simulating the cosmos with ultracold potassium atoms suggests that in a curved, expanding universe pairs of particles pop up out of empty space by marketrent
Most particles don't have zero mass, so the energy also has to come from somewhere.
SequencedLife t1_ivsmk2z wrote
Ground state fluctuations generate the paired particles.
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