Quantum Technologies For LAttice Gauge theories

In the past decades, quantum technologies have been fast developing from proof-of-principle experiments to ready-to-the-market solutions; with applications in many different fields ranging from quantum sensing, metrology, and communication to quantum simulations. Recently, the study of gauge theories has been recognized as an unexpected field of application of quantum technologies.

Gauge theories describe some of the most fundamental and intriguing processes occurring in Nature, ranging from the interaction of elementary high energy particles – described by the Standard Model – to condensed matter systems displaying frustration or topological order. Despite being at the heart of our understanding of many fundamental processes, these systems elude most of our investigative approaches in the non-perturbative regime, whenever real-time dynamics, finite fermionic densities and other problems with complex action are involved and the infamous sign problem hinders the effectiveness of Monte Carlo methods. Thus, developing novel approaches without such limitations will pave the way to unprecedented research possibilities and exciting developments. This is the project’s goal: to develop a new quantum-based sign-problem-free experimental and theoretical tools to simulate strongly correlated many-body quantum systems with Abelian and non-Abelian dynamical gauge degrees of freedom and to apply them to the study of lower dimensional gauge theories,ultimately and in the very long run aiming at Quantum Chromodynamics. The project will develop classical simulation methods based on tensor networks, and develop and run quantum software on experimental quantum simulation platforms. The classical and quantum simulation routes are interconnected and each of them will benefit from the other, however, each route can be a standalone tool to reach the goal, increasing the overall project chances of success.This interdisciplinary project can be developed only within a collaborative effort of different groups as it will exploit knowledge from experimental and theoretical branches of quantum optics; atomic,molecular and optical physics; quantum information science; high energy physics and condensed matter. The results of this project will serve as benchmarks for the first generation of quantum simulators and will have far reaching consequences in different fundamental and applied fields of science ranging from materials science and quantum chemistry to astrophysics. From the technological point of view, this research will allow the study and design of novel materials with topological error correcting capabilities, which will play a central role in the quest for building a scalable quantum computer.


  • Coordinator: Simone Montangero (Saarland University, DE)
  • Ignacio Cirac (Max-Planck-Institut für Quantenoptik, DE)
  • Christine Muschik (Innsbruck University, AT)
  • Frank Verstraete (Ghent University, BE)
  • Leonardo Fallani (Consiglio Nazionale delle Ricerche – Istituto Nazionale di Ottica, IT)
  • Jakub Zakrzewski (Jagiellonian University, PL)

MID-TERM REPORTING: Presentation of the mid-term results of the project 

FINAL REPORTING: Presentation of the final results of the project

PROJECT WEBSITE: www.qt.eu/qtflag

Call year

Call 2017

Call topic


Area of research

Quantum simulation

Start date

April 2018


36 (+13) months

Funding support

€ 1 140 108,75

Project status