Assessing the number of atoms in a Rydberg-blockaded mesoscopic ensemble

Abstract

The dipole blockade of multiple Rydberg excitations in mesoscopic atomic ensembles allows the implementation of various quantum information tasks using collective states of cold, trapped atoms. Precise coherent manipulations of the collective ground and single Rydberg excitation states of an atomic ensemble requires the knowledge of the number of atoms with small uncertainty. We present an efficient method to acquire such information by interrogating the atomic ensemble with resonant pulses while monitoring the resulting Rydberg excitations. We show that after several such steps accompanied by feedback the number of atoms in an ensemble can be assessed with high accuracy. This will facilitate the realization of high fidelity quantum gates, long term storage of quantum information and deterministic sources of single photons with Rydberg-blockaded atomic ensembles.

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Cited by in corpus (6)

• Generation and detection of a sub-Poissonian atom number distribution in a one-dimensional optical lattice
• Preparation of hundreds of microscopic atomic ensembles in optical tweezer arrays
• Deterministic free-space source of single photons using Rydberg atoms
• Filtering single atoms from Rydberg blockaded mesoscopic ensembles
• A quantum register using collective excitations in a Bose-Einstein condensate
• Deterministic facilitated excitation of the weakly-driven atom in heteronuclear Rydberg atom pairs beyond antiblockade