Optical lattice with heterogeneous atomic density

Atomic current across an optical lattice.

We devise a microscopic model for the emergence of a collision-induced, fermionic atomic current across a tilted optical lattice. Tuning the--experimentally controllable--parameters of the microscopic dynamics allows us to switch from Ohmic to negative differential conductance.

Gravitational wave detection with optical lattice atomic clocks

S. Kolkowitz, I. Pikovski, N. Langellier, M. D. Lukin, R. L. Walsworth, and J. Ye JILA, NIST and University of Colorado, Boulder, Colorado 80309, USA Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA Harvard-Smithsonian Center for Astrophysics and Center for Brain Science, Cambri...

Increasing the Atomic Density in a Near Resonant Dark Optical Lattice

Fermion pairing with spin-density imbalance in an optical lattice

Abstract. We consider pairing in a two-component atomic Fermi gas, in a threedimensional optical lattice, when the components have unequal densities, i.e. the gas is polarized. We show that a superfluid where the translational symmetry is broken by a finite Cooper pair momentum, namely an FFLO-type state, minimizes the Helmholtz free energy of the system. We demonstrate that such a state is cle...

Magnetic field-induced spectroscopy of forbidden optical transitions with application to lattice-based optical atomic clocks.

We develop a method of spectroscopy that uses a weak static magnetic field to enable direct optical excitation of forbidden electric-dipole transitions that are otherwise prohibitively weak. The power of this scheme is demonstrated using the important application of optical atomic clocks based on neutral atoms confined to an optical lattice. The simple experimental implementation of this method...