Bose-Einstein Condensation of Metastable Helium

F. Pereira Dos Santos, J. Leonard, Junmin Wang +6

We have observed a Bose-Einstein Condensate in a dilute gas of ${}^4$He in the $2^3{S}_1$ metastable state. We find a critical temperature of $(4.7\pm 0.5)\mu$K and a typical number of a…