QUROPE Quantum Information Processing and Communication in Europe

Talk by Daniel Barredo: "Quantum simulation of Ising-type Hamiltonians in tunable 2D arrays of single Rydberg atoms"

Talk by Antoine Browaeys: "Gates, entanglement, many-body physics and all that using individual Rydberg atoms"

Talk by Antoine Browaeys: "Implementation of the Quantum Ising model in arrays of individual Rydberg atoms"

We explore the dynamics of Rydberg excitations in an optical tweezer array under antiblockade (or facilitation) conditions. Because of the finite temperature the atomic positions are randomly spread, an effect that leads to quenched correlated disorder in the interatomic interaction strengths. This drastically affects the facilitation dynamics as we demonstrate experimentally on the elementary example of two atoms.

Large arrays of individually controlled atoms trapped in optical tweezers are a very promising platform for quantum engineering applications. However, to date, only disordered arrays have been demonstrated, due to the non-deterministic loading of the traps. Here, we demonstrate the preparation of fully loaded, two-dimensional arrays of up to 50 microtraps each containing a single atom, and arranged in arbitrary geometries.

This review summarizes experimental works performed over the last decade by several groups on the manipulation of a few individual interacting Rydberg atoms. These studies establish arrays of single Rydberg atoms as a promising platform for quantum-state engineering, with potential applications to quantum metrology, quantum simulation and quantum information.

Many proof-of-principle platforms for quantum simulation of spin models such as the Ising model have been implemented. It has proved difficult to produce a design with sufficient flexibility to realize arbitrary geometries and variable distance, however. Here, the authors have developed a platform that achieves this flexibility with large atom numbers. The setup is based on arrays of optical microtraps. Creating spin chains with periodic boundary conditions, the authors study the dynamics of an Ising-like spin system with 30 spins.

In relation to the event "Quantum Europe 2017 - Towards the Quantum Technology Flagship" that took place last friday (17.02.2017), the European Commission has published the slides presented during the event, which can be found here. Moreover, the Maltese presidency published a press release (which can be found in the previous link).

Oliver Morsch (INO):  “Mr. Feynman meets Herr Rydberg”, talk given at the Dipartimento di Fisica, Pisa, on 12/05/2016