A Controlled Phase Gate Between a Single Atom and an Optical by Andreas Reiserer

By Andreas Reiserer

This thesis studies on significant steps in the direction of the conclusion of scalable quantum networks. It addresses the experimental implementation of a deterministic interplay mechanism among flying optical photons and a unmarried trapped atom. specifically, it demonstrates the nondestructive detection of an optical photon. To this finish, unmarried rubidium atoms are trapped in a third-dimensional optical lattice on the middle of an optical hollow space within the powerful coupling regime. complete keep an eye on over the atomic country — its place, its movement, and its digital country — is completed with laser beams utilized alongside the resonator and from the facet. while faint laser pulses are mirrored from the resonator, the mixed atom-photon nation acquires a state-dependent section shift. In a primary sequence of experiments, this is often hired to nondestructively observe optical photons through measuring the atomic nation after the mirrored image strategy. Then, quantum bits are encoded within the polarization of the laser pulse and within the Zeeman nation of the atom. The state-dependent section shift mediates a deterministic common quantum gate among the atom and one or successively mirrored photons, that is used to generate entangled atom-photon, atom-photon-photon, and photon-photon states out of separable enter states.

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