Tunneling phase gate for neutral atoms in a double-well lattice
Frederick W. Strauch, Mark Edwards, Eite Tiesinga +2 more
We propose a two-qubit phase gate for ultracold atoms in a tilted double-well optical lattice. Such a lattice is capable of confining pairs of atoms in a two-dimensional array of double-well potentials where both the barrier height and the energy difference of the minima of the two wells (known as the ``tilt'') can be controlled. The four lowest single-particle motional states can be used to form spatially separated qubits. We present a time-dependent scheme to manipulate the tilt to induce tunneling oscillations which produce a collisional phase gate. Numerical simulations demonstrate that this gate can be performed with high fidelity.
arXiv:0712.1856•Physical Review A•May 12, 2008•20 citations