Correction to: Nature https://doi.org/10.1038/s41586-021-03537-9 Published online 9 June 2021

In this Article, in the sentence beginning ‘In absolute terms…’, there is an ‘equal to’ sign missing from the second equation. The equation should read: \({T}_{{\rm{c}}}=2\pi n{\hslash }^{2}/[m{k}_{{\rm{B}}}\,{\rm{l}}{\rm{n}}(380/\mathop{g}\limits^{ \sim })]=37(6)\,{\rm{n}}{\rm{K}}\). The Article has been corrected online.