H2020

Communication from the EC: Quantum Technology Flagship programme officially published – aims for 2018 ramp up phase.

Summary: 

The preparatory steps will begin already this year.

 

As previously announced, the European commission has officialised the process that will lead to a Quantum technology Flagship in connection with the final phase of the framework program H2020.

The communication, which addresses also the broad framework of the “European Cloud Initiative“,  indicate that the EC will launch the stakeholder consultation already this year. The aim is to be ready for the ramp up phase by the beginning of 2018.

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: 

arXiv:1611.02594

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: 

arXiv:1702.07358

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: 
2017-05-22
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: 

arxiv:1705.07685

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.

Driven-dissipative many-body systems with mixed power-law interactions: Bistabilities and temperature-driven nonequilibrium phase transitions

Date: 
2016-07-14
Author(s): 

N. Sibalic, C. G. Wade, C. S. Adams, K. J. Weatherill and T. Pohl

Reference: 

PHYSICAL REVIEW A 94, 011401(R) (2016)

We investigate the nonequilibrium dynamics of a driven-dissipative spin ensemble with competing power-law interactions. We demonstrate that dynamical phase transitions as well as bistabilities can emerge for asymptotic van der Waals interactions, but critically rely on the presence of a slower decaying potential core.

Syndicate content