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NanoBragg SIGNED

Nanofiber-based atomic Bragg structures

Total Cost €

EC-Contrib. €

Partnership

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Outcomes and
results

NanoBragg project word cloud

Explore the words cloud of the NanoBragg project. It provides you a very rough idea of what is the project "NanoBragg" about.

evanescently protocol direction photon enhanced rate protocols atomic small structure atom optical modes atoms benefit evanescent ideal trapped coupling hence discoveries bragg resonance significantly reflection array coherence blocks coupled thousands nanofibers memories progress candidate nonlinearities true engineer rapid specialized desired nanofiber memory polarization inter spacing guides carefully lattice improves believe fiber extraordinary dlcz efficient adjusting qip subsequently percent building ensemble interface emission proven combination area special guided create unleashed easily propagation light few length millimeres spontaneous multilevel transmission fundamental view quantum created

Project "NanoBragg" data sheet

The following table provides information about the project.

Coordinator	TECHNISCHE UNIVERSITAET WIEN Organization address address: KARLSPLATZ 13 city: WIEN postcode: 1040 website: www.tuwien.ac.at contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.
Coordinator Country	Austria [AT]
Project website	http://www.nanofiber.at
Total cost	178˙156 €
EC max contribution	178˙156 € (100%)
Programme	1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
Code Call	H2020-MSCA-IF-2014
Funding Scheme	MSCA-IF-EF-ST
Starting year	2015
Duration (year-month-day)	from 2015-09-01 to 2017-08-31

Partnership

Take a look of project's partnership.

#	participants	country	role	EC contrib. [€]
1	TECHNISCHE UNIVERSITAET WIEN TECHNISCHE UNIVERSITAET WIEN Organization address address: KARLSPLATZ 13 city: WIEN postcode: 1040 website: www.tuwien.ac.at contact info title: n.a. name: n.a. surname: n.a. function: n.a. email: n.a. telephone: n.a. fax: n.a.	AT (WIEN)	coordinator	178˙156.00

Map

Project objective

In this proposal, we want to create an atomic Bragg structure by carefully adjusting the inter-atomic spacing between nanofiber-trapped atoms to approach a Bragg resonance. The structure allows to engineer the atom-nanofiber coupling for quantum-information applications. We hence build on the recent rapid progress of a novel light-matter interface based on an atomic ensemble trapped in an optical lattice created by the evanescent field of nanofiber-guided light. The small effective area of the evanescently guided light field results in a large optical depth per atom on the few-percent level. The number of atoms can easily reach several thousands for nanofibers with a length of few millimeres. In combination with the proven coherence properties, it is an ideal candidate for the implementation of fundamental building blocks for quantum information processing (QIP), such as efficient fiber-integrated quantum memories for light and optical nonlinearities on the few-photon level. However, in view of recent discoveries related to the coupling between polarization and propagation direction of the nanofiber modes, we believe that the true potential of the nanofiber system can only be unleashed by developing specialized protocols. Those protocols need to take the extraordinary polarization properties of the nanofiber-guided modes and the multilevel structure of the atoms into account. Specialized protocols will benefit from the enhanced coupling of the atoms to the nanofiber provided by the Bragg structure. We will characterize the transmission and reflection properties of the nanofiber-coupled atomic Bragg structure, with special attention to polarization effects. Subsequently we will demonstrate how the Bragg resonance can be used to enhance the spontaneous emission of the atomic array into nanofiber-guides modes with a desired propagation direction and how this significantly improves the success rate of the DLCZ quantum memory protocol.

Publications

List of publications.
year	authors and title	journal	last update
2015	Stefan Scheel, Stefan Yoshi Buhmann, Christoph Clausen, Philipp Schneeweiss Directional spontaneous emission and lateral Casimir-Polder force on an atom close to a nanofiber published pages: , ISSN: 1094-1622, DOI: 10.1103/PhysRevA.92.043819	Physical Review A 92/4	2019-06-14
2016	B. Albrecht, Y. Meng, C. Clausen, A. Dareau, P. Schneeweiss, A. Rauschenbeutel Fictitious magnetic-field gradients in optical microtraps as an experimental tool for interrogating and manipulating cold atoms published pages: , ISSN: 2469-9926, DOI: 10.1103/PhysRevA.94.061401	Physical Review A 94/6	2019-06-14

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