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Quasicrystal SIGNED

An Optical Quasicrystal for ultracold atoms

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Project "Quasicrystal" data sheet

The following table provides information about the project.

Coordinator
THE CHANCELLOR MASTERS AND SCHOLARSOF THE UNIVERSITY OF CAMBRIDGE 

Organization address
address: TRINITY LANE THE OLD SCHOOLS
city: CAMBRIDGE
postcode: CB2 1TN
website: www.cam.ac.uk

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 United Kingdom [UK]
 Project website http://www.manybody.phy.cam.ac.uk/
 Total cost 1˙499˙086 €
 EC max contribution 1˙499˙086 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-STG
 Funding Scheme ERC-STG
 Starting year 2017
 Duration (year-month-day) from 2017-01-01   to  2021-12-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    THE CHANCELLOR MASTERS AND SCHOLARSOF THE UNIVERSITY OF CAMBRIDGE UK (CAMBRIDGE) coordinator 1˙499˙086.00

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 Project objective

During the last fifteen years, ultracold atoms in optical lattices have emerged as a powerful model system to study the many-body physics of interacting particles in periodic potentials. The main objective of this proposal is to extend this level of control to quasiperiodic potentials by realizing an optical quasicrystal.

Quasicrystals are a novel form of condensed matter that is non-periodic, but long-range ordered. They have first been observed in the 1980s by Dan Shechtman in diffraction experiments. Quasicrystals give rise to a pattern of sharp Bragg peaks, similar to periodic crystals, but with rotational symmetries that are impossible for periodic structures. Their structure was found to be given by aperiodic tilings with more than one unit cell, such as the celebrated Penrose tiling. Even though quasicrystals are long-range ordered, many foundational concepts of periodic condensed matter systems such as Blochwaves or Brillouin zones are not applicable. This places them on an interesting middle ground between periodic and disordered systems and highlights their potential for novel many-body physics.

We will first characterize the optical quasicrystal using Kapitza-Dirac diffraction, and then study their unusual transport properties and relaxation dynamics after quantum quenches in the presence of interactions. We will additionally look for interesting novel phases at strong interactions and investigate the topological properties of quasiperiodic potentials.

Building on my substantial expertise with optical lattices, I thus plan to build a versatile quantum simulator for the physics of quasicrystals by combining a non-periodic optical potential with ultracold Rubidium and Potassium gases.

 Publications

year authors and title journal last update
List of publications.
2020 Matteo Sbroscia, Konrad Viebahn, Edward Carter, Jr-Chiun Yu, Alexander Gaunt, Ulrich Schneider
Observing localisation in a 2D quasicrystalline optical lattice
published pages: , ISSN: , DOI:
ArXiv 2020-03-05
2019 Attila Szabó, Ulrich Schneider
Mixed spectra and partially extended states in a two-dimensional quasiperiodic model
published pages: , ISSN: , DOI:
Arxiv (PRB accepted) 1909.02048 2020-01-30
2019 Konrad Viebahn, Matteo Sbroscia, Edward Carter, Jr-Chiun Yu, Ulrich Schneider
Matter-Wave Diffraction from a Quasicrystalline Optical Lattice
published pages: , ISSN: 0031-9007, DOI: 10.1103/physrevlett.122.110404
Physical Review Letters 122/11 2020-01-30
2018 Attila Szabó, Ulrich Schneider
Non-power-law universality in one-dimensional quasicrystals
published pages: , ISSN: 2469-9950, DOI: 10.1103/physrevb.98.134201
Physical Review B 98/13 2020-01-23

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