quantum boomerang effect
... that the quantum boomerang effect causes particles to turn around and return to their starting point?
... that the <b id="mwB9Q"><a href="./Quantum_boomerang_effect" id="mwB9U" rel="mw:WikiLink" title="Quantum boomerang effect">quantum boomerang effect</a></b> causes particles to turn around and return to their starting point?