Temp minimum and productivity are regulated by your circadian rhythm and there are many works on the topic. E.g., https://pubmed.ncbi.nlm.nih.gov/12388468/, https://pubmed.ncbi.nlm.nih.gov/31033013/.

You also may want to listen to Dr. Andrew D. Huberman, a neuroscientist and tenured professor in the Department of Neuroscience at the Stanford University School of Medicine. He perfectly describes how it works in one of his YouTube videos: https://www.youtube.com/watch?v=aXvDEmo6uS4&t=530s

Will be great to hear back if you try this approach!