Geometric Manipulation of Ensembles of Atoms on Atom Chip for Quantum Computation

Details Geometric Manipulation of Ensembles of Atoms on Atom Chip for Quantum Computation Geometric Manipulation of Ensembles of Atoms on Atom Chip for Quantum Computation

2011-09-23

arxiv.org/abs/1109.5009v1

Physics

Quantum Physics

17 pages, 14 figures

Scientific paper

We propose a feasible scheme to achieve quantum computation based on geometric manipulation of ensembles of atoms, and analyze it for neutral rubidium atoms magnetically trapped in planoconcave microcavities on an atom chip. The geometric operations are accomplished by optical excitation of a single atom into a Rydberg state in a constant electric field. Strong dipole-dipole interactions and incident lasers drive the dark state of the atom ensembles to undergo cyclic evolutions that realize a universal set of quantum gates. Such geometric manipulation turns out naturally to protect the qubits from the errors induced by non-uniform laser illumination as well as cavity loss. The gate performance and decoherence processes are assessed by numerical simulation.

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