Pressure effect on hyperfine CPT resonance of ground-state Li atoms in glass hot-vapor cell

Motion of microswimmers in cylindrical microchannels

“…This is in qualitative agreement with theoretical calculations for a swimmer near a wall. 52 Despite the fact that the propulsion force may become very large under strong confinements, the swimming velocity can never exceed the velocity of a swimmer in an unbound fluid for r sq /R cap -0. This indicates that the fluid resistance generally grows faster than the propulsion force with increasing confinement, due to the assumption of a force-free swimmer.…”