TY - JOUR T1 - Hong-Ou-Mandel atom interferometry in tunnel-coupled optical tweezers JF - Science Y1 - 2014 A1 - A. M. Kaufman A1 - B. J. Lester A1 - C. M. Reynolds A1 - M. L. Wall A1 - Michael Foss-Feig A1 - K. R. A. Hazzard A1 - A. M. Rey A1 - C. A. Regal AB - The quantum statistics of atoms is typically observed in the behavior of an ensemble via macroscopic observables. However, quantum statistics modifies the behavior of even two particles, inducing remarkable consequences that are at the heart of quantum science. Here we demonstrate near-complete control over all the internal and external degrees of freedom of two laser-cooled 87Rb atoms trapped in two optical tweezers. This full controllability allows us to implement a massive-particle analog of a Hong-Ou-Mandel interferometer where atom tunneling plays the role of a photon beamsplitter. We use the interferometer to probe the effect of quantum statistics on the two-atom dynamics under tunable initial conditions, chosen to adjust the degree of atomic indistinguishability. Our work thereby establishes laser-cooled atoms in optical tweezers as a new route to bottom-up engineering of scalable, low-entropy quantum systems. VL - 345 U4 - 306 - 309 UR - http://arxiv.org/abs/1312.7182v2 CP - 6194 J1 - Science U5 - 10.1126/science.1250057 ER -