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

Abstract

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.

arXiv comment5 pages, 4 figures

References in corpus (16)

• Fast quantum gates for neutral atoms
• Entanglement of atoms via cold controlled collisions
• A simple formula for the average gate fidelity of a quantum dynamical operation
• Quantum Logic Gates in Optical Lattices
• Direct Observation of Second Order Atom Tunnelling
• Controlled exchange interaction between pairs of neutral atoms in an optical lattice
• A lattice of double wells for manipulating pairs of cold atoms
• Quantum gates with neutral atoms: Controlling collisional interactions in time dependent traps
• State preparation and dynamics of ultracold atoms in higher lattice orbitals
• Quantum computations with atoms in optical lattices: marker qubits and molecular interactions
• Microwave potentials and optimal control for robust quantum gates on an atom chip
• Quantum computing with spatially delocalized qubits
• Quantum computing in optical microtraps based on the motional states of neutral atoms
• Effective-range description of a Bose gas under strong one- or two-dimensional confinement
• Collisional de-excitation in a quasi-2D degenerate Bose gas
• Theoretical analysis of the implementation of a quantum phase gate with neutral atoms on atom chips

Cited by in corpus (14)

• Measurement-based quantum computer in the gapped ground state of a two-body Hamiltonian
• Alkaline-Earth-Metal Atoms as Few-Qubit Quantum Registers
• Creation, manipulation, and detection of Abelian and non-Abelian anyons in optical lattices
• Simulations of quantum double models
• A quantum computation architecture using optical tweezers
• Quantum dark soliton (qubits) in Bose Einstein condensates
• Tunneling, self-trapping and manipulation of higher modes of a BEC in a double well
• Two-mode effective interaction in a double-well condensate
• Quantum computation with ultracold atoms in a driven optical lattice
• Macroscopic Superposition of Ultracold Atoms with Orbital Degrees of Freedom
• Macroscopic superposition states of ultracold bosons in a double-well potential
• Bound states of a light atom and two heavy dipoles in two dimensions
• Generating scalable entanglement of ultracold bosons in superlattices through resonant shaking
• Square wave oscillation of soliton in double-well potential trapped BEC