title: Confinement induced molecules in a 1D Fermi gas.
abstract: We have observed two-particle bound states of atoms confined in a one-dimensional matter waveguide. These bound states exist irrespective of the sign of the scattering length, contrary to the situation in free space. Using radio-frequency spectroscopy we have measured the binding energy of these dimers as a function of the scattering length and confinement and find good agreement with theory. The strongly interacting one-dimensional Fermi gas which we create in an optical lattice represents a realization of a tunable Luttinger liquid.
authors.affiliation: Institute of Quantum Electronics, ETH Zürich, Hönggerberg, CH-8093 Zürich, Switzerland.
authors.forename: Henning
authors.initials: H
authors.lastname: Moritz
authors.forename: Thilo
authors.initials: T
authors.lastname: Stöferle
authors.forename: Kenneth
authors.initials: K
authors.lastname: Günter
authors.forename: Michael
authors.initials: M
authors.lastname: Köhl
authors.forename: Tilman
authors.initials: T
authors.lastname: Esslinger