Practical four-dimensional quantum key distribution without entanglement William T. Buttler, Steven K. Lamoreaux, and Justin R. Torgerson 1-8 Bell violations through independent bases games Oded Regev 9-20 Impossibility of succinct quantum proofs for collision-freeness Scott Aaronson 21-28 Black-box Hamiltonian simulation and unitary implementation Andrew M. Childs and Dominic W. Berry 29-62 Mix..