Mainz 2017 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 31: Poster Session III

A 31.37: Poster

Donnerstag, 9. März 2017, 17:00–19:00, P OG1

Long-range quantum gate via Rydberg states of atoms in a thermal microwave cavity — •Lorinc Sárkány¹, József Fortágh¹, and David Petrosyan^{2, 3} — ¹Eberhard Karls Universität Tübingen, Physikalisches Institut, Auf der Morgenstelle 14, D-72076 Tübingen, Germany — ²Institute of Electronic Structure and Laser, FORTH, GR-71110 Heraklion, Crete, Greece — ³Aarhus Institute of Advanced Studies, Aarhus University, DK-8000 Aarhus C, Denmark

We propose a universal quantum gate based on two spatially separated Rydberg atoms coupled through a non-resonant microwave cavity, which may be in any superposition or mixture of photon number states. Quantum interference of different transition paths from the two-atom ground to the double-excited Rydberg states involving a single microwave photon exchange through the cavity makes both the transition amplitude and resonance largely insensitive to cavity excitations. Our scheme for attaining ultra-long-range interactions and entanglement also applies to mesoscopic atomic ensembles in the Rydberg blockade regime and is scalable to many ensembles trapped within a centimeter-sized microwave resonator.