Quantum Engineering

FOMO2018 Summer School of the Conference Frontiers of MatterWave Optics

Date: 
2018-09-10 - 2018-09-14
Registration deadline: 
2018-07-01 (All day)
Place: 
Crete, Greece

Scope of the Summer School

The summer school aims at providing a strong background in matter-wave physics to those starting in the field, be it PhD students or early stage post-docs. The school will consist of a series of in-depth lectures by leading experimentalists and theorists in the field. The summer school is to some extent a preparation to the conference, which follows the week after.

The summer school will take place in the village of Archanes, close to Heraklion on Crete (Greece).  

High Level Steering Committee Final Report published

Summary: 

The final report of the High Level Steering Committee for Quantum Technologies has been published.

On the 18th of September the final report of the High Level Steering Committee on Quantum Technologies has been published. This documents complete the intermidiate report which was published in February. The final report expands the section dedicated on the implementation and include a proposal for the governance structure of the QT flagship.

you can find the document at this link https://ec.europa.eu/digital-single-market/en/news/quantum-flagship-high...

Pre-publication of the LEIT-ICT WP18-20 (including QKD Testbed)

Summary: 

The European Commission has made available the prepublication version of the calls for the ICT part of the Work-programme 2018-2020. the documents contains the call for the QKD testbed

Following up yesterday announcement, with the prepublication of the FET workprogramme (you can find the previous announcement here http://qurope.eu/db/news/prepublication-h2020-fet-work-programme-2018-2020 ), the European Commission has made available the prepublication version of another piece of the 2018-2020 work-programme, the one dedicated to the Information and Communication Technology (ICT), which include the call for the QKD testbed. you can find the document here https://ec.europa.eu/programmes/horizon2020/sites/horizon2020/files/h202...

Prepublication of the H2020 FET work Programme 2018-2020

Summary: 

The EC has made available a prepubblication version of the H2020 Work programme 2018-2020

The European Commission has made available a draft version of the work-programme 2018-2020, which can be found at this link: https://ec.europa.eu/programmes/horizon2020/en/what-work-programme

This is still a preliminary version pending formal adoption by the European Commission, which should happen in October.

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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Rydberg-induced optical nonlinearities from a cold atomic ensemble trapped inside a cavity

Date: 
2016-04-05
Author(s): 

R. Boddeda, I. Usmani, E. Bimbard, A. Grankin, A. Ourjoumtse, E. Brion & P. Grangier

Reference: 

J. Phys. B: At. Mol. Opt. Phys. 49, 084005 (2016)

We experimentally characterize the optical nonlinear response of a cold atomic medium placed inside an optical cavity, and excited to Rydberg states. The excitation to S and D Rydberg levels is carried out via a two-photon transition in an electromagnetically induced transparency configuration, with a weak (red) probe beam on the lower transition, and a strong (blue) coupling beam on the upper transition. The observed optical nonlinearities induced by S states for the probe beam can be explained using a semi-classical model with van der Waals' interactions.

Inelastic Photon Scattering via the Intracavity Rydberg Blockade

Date: 
2016-12-16
Author(s): 

A. Grankin, E. Brion, R. Boddeda, S. Ćuk, I. Usmani, A. Ourjoumtsev & P. Grangier

Reference: 

Phys. Rev. Lett. 117, 253602 (2016)

Electromagnetically induced transparency (EIT) in a ladder system involving a Rydberg level is known to yield giant optical nonlinearities for the probe field, even in the few-photon regime. This enhancement is due to the strong dipole-dipole interactions between Rydberg atoms and the resulting excitation blockade phenomenon. In order to study such highly correlated media, ad hoc models or low-excitation assumptions are generally used to tackle their dynamical response to optical fields.

Nonlinear optical susceptibility of EIT systems with a degenerate Rydberg level

Date: 
2016-05-23
Author(s): 

Jovica Stanojevic, Philippe Grangier & Robin Côté

Reference: 

J. Phys. B: At. Mol. Opt. Phys. 49, 124003 (2016)

It has been demonstrated that very large optical nonlinearities can arise in cold Rydberg gases from strong Rydberg–Rydberg interactions. The interactions between atoms excited to a degenerate Rydberg level are described by a large number of molecular potentials which greatly complicates the theoretical treatment of these systems. We here present a method for very accurate calculation of the third order interaction-induced optical nonlinearities that fully includes the angle-dependent mixing of molecular states by the control optical field.

Quantum-optical nonlinearities induced by Rydberg-Rydberg interactions: A perturbative approach

Date: 
2015-10-29
Author(s): 

A. Grankin, E. Brion, E. Bimbard, R. Boddeda, I. Usmani, A. Ourjoumtsev & P. Grangier

Reference: 

Phys. Rev. A 92, 043841 (2015)

In this article, we theoretically study the quantum statistical properties of the light transmitted through or reflected from an optical cavity, filled by an atomic medium with strong optical nonlinearity induced by Rydberg-Rydberg van der Waals interactions. Atoms are driven on a two-photon transition from their ground state to a Rydberg level via an intermediate state by the combination of a weak signal field and a strong control beam.

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