The Superfluid Mass Density and the Landau Criterion for Superfluidity

Thursday 20 Nov 2014, 15:00 → 16:30 Asia/Tokyo

Main research building, 4F room 433 (RIKEN Wako)

Date/time : Nov.20 (Thur.) 3pm- Place: Main research building, 4th floor, room 433 Speaker: Prof. Gordon Baym (Univ. of Illinois at Urbana Champaign) Title: The Superfluid Mass Density and the Landau Criterion for Superfluidity Abstract: A finite superfluid mass density is the defining characteristic of superfluids and superconductors. In this talk I will discuss the phenomenology and the microscopic theory of the superfluid mass density. I will then address why the commonly used Landau criterion for superfluidity is neither necessary nor sufficient to have superfluidity. Finally I will discuss experiments, past and future, on the superfluid mass density in ultracold bosonic and fermionic atomic systems.