Molecules immersed in liquid helium can probe superfluidity since their electronic, vibrational and rotational dynamics can provide valuable cues about the superfluid at the nanoscale. In a new report in Science Advances, Alexander Milner and a team of scientists in physics and astronomy, and chemistry at the University of British Columbia, Canada and the University of California, Irvine, U.S., described an experimental study of laser-induced rotation of helium dimers inside a superfluid helium bath at various temperatures.
