Engineering Ultracold Atoms in a Novel Optical Lattice

Nathan E. Lundblad

Anonymous

Ultracold atoms in an optical lattice share a lot of physics with electrons in a crystalline solid and it is a system that is often much easier to control. By forcing an optical lattice to vary with time, it is possible to engineer the energy of cold atoms and essentially bring them to a halt.

C. M. Chandrashekar, Raymond Laflamme

We present an approach using quantum walks (QWs) to redistribute ultracold atoms in an optical lattice. Different density profiles of atoms can be obtained by exploiting the controllable properties of QWs, such as the variance and the probability distribution in position space using quantum coin parameters and engineered noise. The QW evolves the density profile of atoms in a superposition of position space, resulting in a quadratic speedup of the process of quantum phase transition. We also discuss implementation in presently available setups of ultracold atoms in optical lattices.

Immanuel Bloch

Immanuel Bloch, Markus Greiner

Julio T. Barreiro

I will discuss how state-of-the-art experiments with ultracold atoms in optical lattices can be extended to realize fermionic quantum computations for chemistry, achieved by engineering arbitrary hoping and specific many-body interactions of fermions.