H2020

The European quantum technologies flagship programme - Special Issue in Quantum Science and Technology

Summary: 

A recently published article on the Quantum Science and Technology tackles the topic of the European Quantum Technologies Flagship Programme

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RySQ startup meeting, Aarhus, Denmark

Servaas Kokkelmans (TUE) talk: Optically imprinted Rydberg lattices

A Coherent Quantum Annealer with Rydberg Atoms

Date: 
2016-11-08
Author(s): 

A. W. Glaetzle, R. M. W. van Bijnen, P. Zoller, W. Lechner

Reference: 

Nat. Commun. 8, 15813 (2017)

There is a significant ongoing effort in realizing quantum annealing with different physical platforms. The challenge is to achieve a fully programmable quantum device featuring coherent adiabatic quantum dynamics. Here we show that combining the well-developed quantum simulation toolbox for Rydberg atoms with the recently proposed Lechner-Hauke-Zoller~(LHZ) architecture allows one to build a prototype for a coherent adiabatic quantum computer with all-to-all Ising interactions and, therefore, a novel platform for quantum annealing.

Optimal control of Rydberg lattice gases

Date: 
2017-02-23
Author(s): 

Jian Cui, Rick van Bijnen, Thomas Pohl, Simone Montangero, Tommaso Calarco

Reference: 

Quantum Sci. Technol. 2, 35006 (2017)

We present optimal control protocols to prepare different many-body quantum states of Rydberg atoms in optical lattices. Specifically, we show how to prepare highly ordered many-body ground states, GHZ states as well as some superposition of symmetric excitation number Fock states, that inherit the translational symmetry from the Hamiltonian, within sufficiently short excitation times minimizing detrimental decoherence effects.

Characterizing the local vectorial electric field near an atom chip using Rydberg-state spectroscopy

Date: 
2017-07-25
Author(s): 

N. Cisternas, Julius de Hond, G. Lochead, R.J.C. Spreeuw, H.B. van Linden van den Heuvell, N.J. van Druten

Reference: 

PHYSICAL REVIEW A 96, 013425 (2017)

We use the sensitive response to electric fields of Rydberg atoms to characterize all three vector components of the local electric field close to an atom-chip surface. We measured Stark-Zeeman maps of S and D Rydberg states using an elongated cloud of ultracold Rubidium atoms (T ~2.5 µK) trapped magnetically 100 µm from the chip surface. The spectroscopy of S states yields a calibration for the generated local electric field at the position of the atoms.

A medium-finesse optical cavity for the stabilization of Rydberg lasers

Date: 
2017-05-12
Author(s): 

JULIUS DE HOND, NATALY CISTERNAS, GRAHAM LOCHEAD, AND N.J. VAN DRUTEN

Reference: 

arxiv:1705.04684

Contactless nonlinear optics mediated by long-range Rydberg interactions

Date: 
2016-12-19
Author(s): 

Hannes Busche, Paul Huillery, Simon W. Ball, Teodora Ilieva, Matthew P. A. Jones & Charles S. Adams

Reference: 

Nature Physics (2017), doi:10.1038/nphys4058

In conventional nonlinear optics, linear quantum optics

Single-photon interference due to motion in an atomic collective excitation

Date: 
2016-12-19
Author(s): 

Daniel J. Whiting, Nikola Šibalić, James Keaveney, Charles S. Adams, and Ifan G. Hughes

Reference: 

arXiv:1612.05467v1

Quantum-state engineering is of critical importance to the development of quantum technologies. One promising platform is thermal atomic vapours, because they offer long coherence times with reproducible and scalable hardware. However, the inability to address isolated atomic states in a controlled manner, due to multi-level degeneracy and motional broadening, is a major obstacle to their wider application.

ARC: An open-source library for calculating properties of alkali Rydberg atoms

Date: 
2016-12-16
Author(s): 

N. Šibalic, J. D. Pritchard, C. S. Adams, K. J. Weatherill

Reference: 

arXiv:1612.05529v1

We present an object-oriented Python library for computation of properties of highly-excited Rydberg states of alkali atoms.

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