Now, Christian Groß, on quantum simulation of the Hubbard model, from hidden correlations to magnetic polarons. #LTQI
Christian Groß simulates Hubbard model with cold atoms in optical lattices. Li atoms hop with amplitude t. Currently, they only have global control, no local control. #LTQI
Christian Groß observes the atoms with quantum gas microscopy. He observes a single plane desctructively through a high NA objective every 30s. #LTQI
Christian Groß: quatum gas microscopy allows to see every “electron”, and therefore look at arbitrary correlation functions #LTQI
Christian Groß then shows 1D antiferromagnetic correlations. Then dopes it with holes and looks at spin alignment accross holes. #LTQI
Christian Groß: When the number of holes is known, one can see hidden order through string correlators, and see Haldane phase #LTQI
Christian Groß. Interesting physicas happens in 2D. Delocalization of a doublon (charge deffect) costs energy. #LTQI
Christian Groß image magnetic polarons, comparing pinned and mobile doublon. There is a visible and small “correlation hole”. Small =1 to 2 bond radius. #LTQI
• • •
Missing some Tweet in this thread? You can try to
force a refresh
