title: p-Wave cold collisions in an optical lattice clock.
abstract: We study ultracold collisions in fermionic ytterbium by precisely measuring the energy shifts they impart on the atoms' internal clock states. Exploiting Fermi statistics, we uncover p-wave collisions, in both weakly and strongly interacting regimes. With the higher density afforded by two-dimensional lattice confinement, we demonstrate that strong interactions can lead to a novel suppression of this collision shift. In addition to reducing the systematic errors of lattice clocks, this work has application to quantum information and quantum simulation with alkaline-earth atoms.
authors: National Institute of Standards and Technology, Boulder, Colorado 80305, USA.
authors: N D
authors: ND
authors: Lemke
authors: J
authors: J
authors: von Stecher
authors: J A
authors: JA
authors: Sherman
authors: A M
authors: AM
authors: Rey
authors: C W
authors: CW
authors: Oates
authors: A D
authors: AD
authors: Ludlow