Levitating nanodiamonds to test the limits of the quantum superposition principle Single nitrogen-vacancy (NV-) centres in diamond have isolated electronic and nuclear spins which can store quantum information at room temperature for unprecedentedly long times. We have built an exciting new experiment to study nanodiamonds while they are levitated by a focused laser beam. Our theoretical proposals (developed in collaboration with colleagues in University College London and Imperial College) suggest that we could put these diamonds into a quantum superposition in which they try out being in two places at once. They would be the heaviest things to do this, which would let us probe the boundary between the classical and quantum worlds. We seek a PhD student to further set up and run this experiment. Our lab includes several other NV- experiments for quantum technology focused on nanoscale magnetometry and quantum information processing. Developments on these proceed in collaboration with the levitated nanodiamond experiment. Contact Gavin Morley (gavin.morley@warwick.ac.uk) for more details. A levitated nanodiamond in our lab. A nanodiamond forest grown in our cleanroom.