Testing gravity with Quantum Bouncing Balls

Synopsis

The recent development of the qBounce experiment has offered a new way of testing gravity by studying quantum bouncing balls: neutrons falling in the gravitational potential of the earth and reflecting off mirrors for ultra cold neutrons. This allows the application of gravitational resonance spectroscopy, which can be used to study the weak equivalence principle in the quantum regime, classical gravity with torsion, and place limits on the fifth force and chameleon fields.