QIPC

1st Workshop on Quantum Techniques in Machine Learning - QTML2017

Date: 
2017-11-06 - 2017-11-08
Registration deadline: 
2017-10-31 (All day)
Place: 
University of Verona
AIMS:

 

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.

Optical techniques for Rydberg physics in lattice geometries

Date: 
2017-05-02
Author(s): 

Julian B. Naber, Jannie Vos, Robert J. Rengelink, Rosanne J. Nusselder, and David Davtyan

Reference: 

Eur. Phys. J. Spec. Top. (2016) 225

We address the technical challenges when performing quantum information experiments with ultracold Rydberg atoms in lattice geometries. We discuss the following key aspects: (i) the coherent manipulation of atomic ground states, (ii) the coherent excitation of Rydberg states, and (iii) spatial addressing of individual lattice sites.

Rydberg dressing of a one-dimensional Bose-Einstein condensate

Date: 
2017-05-02
Author(s): 

Marcin Płodzień, Graham Lochead, Julius de Hond, N. J. van Druten, and Servaas Kokkelmans

Reference: 

Phys. Rev. A 95, 043606 (2017)

We study the influence of Rydberg-dressed interactions in a one-dimensional (1D) Bose-Einstein condensate (BEC). We show that a 1D geometry offers several advantages over a three-dimensional geometry for observing BEC Rydberg dressing. The effects of dressing are studied by investigating collective BEC dynamics after a rapid switch-off of the Rydberg dressing interaction.

QUSOFT LAUNCHES NEW COLLABORATION WITH FRENCH AND LATVIAN PARTNERS

Summary: 

QuSoft, the PCQC and the University of Latvia started a collaboration to develop quantum software.

On April 28th, QuSoft (the Dutch research centre for quantum software), the Paris Centre for Quantum Computing (PCQC) and the University of Latvia signed a memorandum of understanding to jointly push the frontiers of quantum information theory and develop quantum software for the future quantum computer.

CEQIP 2017

Date: 
2017-05-31 - 2017-06-03
Registration deadline: 
2017-04-24 (All day)
Place: 
Smolenice castle, Slovak Republic

Registration for the 14th Central European Quantum Information Processing Workshop is now open.

CEQIP is traditionally focused on current challenges and paradigms of mathematical and computational aspects of emerging quantum technologies. This year's edition will take place on May 31st - June 3rd, 2017, at the Smolenice castle, Slovakia.

Invited speakers:
Antonio Acin
Caslav Brukner
Sergey N. Filippov
Otfried Gühne
+++

NanoQI 2017

Date: 
2017-07-24 - 2017-07-28
Registration deadline: 
2017-04-28 (All day)
Place: 
Donostia-San Sebastian

The school "Nanotechnology meets Quantum Information (NanoQI)" provides a broad overview of different implementations of quantum information processing and quantum technologies. The school is aimed at PhD students and young postdocs interested in quantum information processing and quantum technologies.

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