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A: Fachverband Atomphysik

A 32: Rydberg gasses I

A 32.2: Talk

Friday, March 10, 2017, 11:15–11:30, HS 20

Collective holonomic phase gate by Rydberg-dressed photon blockade — •Felix Motzoi and Klaus Molmer — Aarhus University

We present a scheme for applying a phase gate on an array of neutral atoms, conditioned on all of them being in the same ground state. The gate consist of a geometric phase using the ancillary degrees of freedom given by a cavity and second ensemble of neutral atoms of a different species, via an EIT mechanism to blockade or allow photons to enter the system. All operations are dark with respect to the atoms, of both the quantum register and ancillary species, with far-detuned Rydberg dressing avoiding almost any Rydberg population. This allows for a gate error that scales nearly independently of the total number of quantum registers.