Topological property of a limit cycle and universal four-body bound states in Efimov physics

by Mr Horinouchi Yusuke

Monday 7 Mar 2016, 13:30 → 14:30 Asia/Tokyo

Main Research Building 433 (RIKEN Wako)

Date: Mar 7 (Mon) Time: 13:30 - Place: Main Research bldg. 433 Speaker: Yusuke Horinouchi (Department of Physics, The University of Tokyo) Title: Topological property of a limit cycle and universal four-body bound states in Efimov physics Abstract: Efimov effect is a universal quantum phenomenon, in which resonantly interacting three bosons form an infinite series of 3-body bound states that feature a geometric spectra. This discrete scale invariant nature makes the Efimov physics a prime example of the renormalization-group (RG) limit cycle, where an RG flow forms a periodic circle. Even more esoteric is the numerically unveiled fact that every Efimov trimer is accompanied by a pair of tetramers. We have recently shown that this hierarchy of universal few-body clusters has a topological origin by demonstrating that the winding number of the limit cycle onto the theory space corresponds to the number of the universal 3- and 4-body bound states. See more QHP seminars