Tunneling phase gate for neutral atoms in a double-well lattice

Details Tunneling phase gate for neutral atoms in a double-well lattice Tunneling phase gate for neutral atoms in a double-well lattice

2007-12-12

arxiv.org/abs/0712.1856v1

Physics

Quantum Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevA.77.050304

We propose a new two--qubit phase gate for ultra--cold atoms confined in an experimentally realized tilted double--well optical lattice [Sebby--Strabley et al., Phys. Rev. A {\bf 73} 033605 (2006)]. Such a lattice is capable of confining pairs of atoms in a two--dimensional array of double--well potentials where control can be exercised over the barrier height and the energy difference of the minima of the two wells (known as the ``tilt''). The four lowest single--particle motional states consist of two pairs of motional states in which each pair is localized on one side of the central barrier, allowing for two atoms confined in such a lattice to be 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.

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