Casimir Radiation, which exerted uneven pressure on starship's sails,
allowed vessels to move between universes of the Matrix and thus achieve effective speed faster than light.5:3
It was also on occasion called Casimir energy,1:4
Cassini energy or Cassini Radiation.1:1
In quantum field theory, the Casimir effect and the Casimir–Polder force are physical forces arising from a quantized field.