Creation of resilient entangled states and a resource for measurement-based quantum computation with optical superlattices

Details Creation of resilient entangled states and a resource for measurement-based quantum computation with optical superlattices Creation of resilient entangled states and a resource for measurement-based quantum computation with optical superlattices

2007-10-26

arxiv.org/abs/0710.5099v3

New J. Phys. 10, 023005 (2008)

Physics

Condensed Matter

Other Condensed Matter

23 pages, 6 figures, IOP style, published in New Journal of Physics. Minor corrections/few typos removed

Scientific paper

10.1088/1367-2630/10/2/023005

We investigate how to create entangled states of ultracold atoms trapped in optical lattices by dynamically manipulating the shape of the lattice potential. We consider an additional potential (the superlattice) that allows both the splitting of each site into a double well potential, and the control of the height of potential barrier between sites. We use superlattice manipulations to perform entangling operations between neighbouring qubits encoded on the Zeeman levels of the atoms without having to perform transfers between the different vibrational states of the atoms. We show how to use superlattices to engineer many-body entangled states resilient to collective dephasing noise. Also, we present a method to realize a 2D resource for measurement-based quantum computing via Bell-pair measurements. We analyze measurement networks that allow the execution of quantum algorithms while maintaining the resilience properties of the system throughout the computation.

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