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Quantum State Assembler

Total Cost €


EC-Contrib. €






Project "QuStA" data sheet

The following table provides information about the project.


Organization address
postcode: 69117

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 Germany [DE]
 Total cost 1˙958˙101 €
 EC max contribution 1˙958˙101 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-COG
 Funding Scheme ERC-COG
 Starting year 2017
 Duration (year-month-day) from 2017-04-01   to  2022-03-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

The biggest challenge to using ultracold fermionic atoms to simulate strongly correlated phases is cooling the system to sufficiently low temperatures. The aim of QuStA is to tackle this challenge with a novel bottom-up approach and assemble many-body systems from individually prepared building blocks. This vision has come within reach through recent breakthroughs in our group in preparing and manipulating few-atom systems with unprecedented fidelity. Building on this experience, we will prepare multiple such few-atom systems and develop strategies to merge them adiabatically to form a many-body system. Initially, we will focus on studying the physics of the Hubbard model, which is prototypical of strongly-correlated systems. Starting from many independently prepared double-well systems, we will assemble a finite lattice system of up to 10 x 10 sites with extremely low entropy. Since our approach will allow us full control over the parameters of the system - such as tunneling, interactions, and doping - we will be in the unique position to investigate the low-temperature phase diagram of the Hubbard model. Our quantum state assembly approach will also allow us to go beyond the Hubbard model and investigate the emergence of correlations in other interesting systems. In particular, we will take an innovative approach of preparing and merging itinerant spin chains to explore bi-layered lattice systems and spin ladders. These experiments will have far-reaching implications beyond the field of ultracold atoms. Our systems will provide an ideal platform to benchmark theories on strongly correlated phenomena since it clearly surpasses the capabilities of modern classical computers. We envision that the insight gained from our experiments will lead to the understanding of exotic quantum phenomena, such as high-Tc superconductivity.


year authors and title journal last update
List of publications.
2019 Philipp M. Preiss, Jan Hendrik Becher, Ralf Klemt, Vincent Klinkhamer, Andrea Bergschneider, Nicolò Defenu, Selim Jochim
High-Contrast Interference of Ultracold Fermions
published pages: , ISSN: 0031-9007, DOI: 10.1103/physrevlett.122.143602
Physical Review Letters 122/14 2019-05-22
2019 Andrea Bergschneider, Vincent M. Klinkhamer, Jan Hendrik Becher, Ralf Klemt, Lukas Palm, Gerhard Zürn, Selim Jochim, Philipp M. Preiss
Experimental characterization of two-particle entanglement through position and momentum correlations
published pages: , ISSN: 1745-2473, DOI: 10.1038/s41567-019-0508-6
Nature Physics 2019-05-15
2018 M. Holten, L. Bayha, A. C. Klein, P. A. Murthy, P. M. Preiss, S. Jochim
Anomalous Breaking of Scale Invariance in a Two-Dimensional Fermi Gas
published pages: 120401, ISSN: 0031-9007, DOI: 10.1103/physrevlett.121.120401
Physical Review Letters 121/12 2019-04-25
2018 Puneet A. Murthy, Mathias Neidig, Ralf Klemt, Luca Bayha, Igor Boettcher, Tilman Enss, Marvin Holten, Gerhard Zürn, Philipp M. Preiss, Selim Jochim
High-temperature pairing in a strongly interacting two-dimensional Fermi gas
published pages: 452-455, ISSN: 0036-8075, DOI: 10.1126/science.aan5950
Science 359/6374 2019-04-25
2018 Andrea Bergschneider, Vincent M. Klinkhamer, Jan Hendrik Becher, Ralf Klemt, Gerhard Zürn, Philipp M. Preiss, Selim Jochim
Spin-resolved single-atom imaging of Li 6 in free space
published pages: 63613, ISSN: 2469-9926, DOI: 10.1103/PhysRevA.97.063613
Physical Review A 97/6 2019-04-25

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