Phase gate and readout with an atom/molecule hybrid platform

Details Phase gate and readout with an atom/molecule hybrid platform Phase gate and readout with an atom/molecule hybrid platform

2009-08-31

arxiv.org/abs/0908.4558v1

Physics

Quantum Physics

Scientific paper

We suggest a combined atomic/molecular system for quantum computation, which takes advantage of highly developed techniques to control atoms and recent experimental progress in manipulation of ultracold molecules. We show that two atoms of different species in a given site, {\it e.g.}, in an optical lattice, could be used for qubit encoding, initialization and readout, with one atom carrying the qubit, the other enabling a gate. In particular, we describe how a two-qubit phase gate can be realized by transferring a pair of atoms into the ground rovibrational state of a polar molecule with a large dipole moment, and allowing two molecules to interact via their dipole-dipole interaction. We also discuss how the reverse process of coherently transferring a molecule into a pair of atoms could be used as a readout tool for molecular quantum computers.

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