Topological phase transition for a quantum rotor with cold bosonic atoms

Piotr Szulim, 1 Marek Trippenbach, 1 Y. B. Band, 2 Mariusz Gajda, 3 and Miros law Brewczyk 4 1 Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warszawa, Poland 2 Department of Chemistry, Department of Physics, Department of Electro-Optics, and the Ilse Katz Center for Nano-Science, Ben-Gurion University, Beer-Sheva 84105, Israel 3 Instytut Fizyki PAN, Aleja Lotnikow 32/46, 02-668 Warsaw, Poland 4 Wydzia l Fizyki, Uniwersytet w Bia lymstoku, ul. K. Cio lkowskiego 1L, 15-245 Bia lystok, Poland (Dated: May 27, 2021)