Hamiltonian Lattice Gauge Theories: Status, Novel Developments and Applications

1 Sept 2025, 09:00 → 5 Sept 2025, 19:00 Europe/Rome

Aula Renzo Leonardi (ECT*)

Carsten Urbach (University of Bonn), Enrique Rico Ortega (University of the Basque Country UPV/EHU), Giuseppe Magnifico (University of Bari), Karl Jansen (DESY Zeuthen / CQTA), Randy Lewis (York University), Simone Romiti (Uni-Bonn)

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With the advent of quantum computers and the recent developments in tensor network methods, Hamiltonian Lattice Gauge Theories have gained renewed interest: The quest is to find efficient formulations of (non-)Abelian lattice gauge theories, which can be facilitated in current and future Hamiltonian simulations. The promise is the ability to investigate problems not accessible to stochastic simulation methods, such as systems at non-zero matter density, topological terms or realtime phenomena. The workshop aims to bring researchers working on these questions together and discuss the most recent algorithmic and methodological developments as well as results for various applications in the field.

Confirmed keynote speakers:

• Christian Bauer
• Stefan Kühn
• Enrico Rinaldi
• Martin Savage

 

Poster Urbach.pdf

Monday 1 September

1 Welcome by the ECT* Director

2 Overview by the Organisers

Speakers: Carsten Urbach (University of Bonn), Enrique Ortega (University of the Basque Country UPV/EHU), Giuseppe Magnifico (University of Bari), Dr Simone Romiti (Uni-Bern)

3 Quantum Simluation of Fundamental Physics

Speaker: Martin Savage (INT & University of Washington)

11:00 Coffee Break

4 Symmetry verification for noisy quantum simulations of non-Abelian lattice gauge theories

Speaker: Edoardo Ballini (Università di Trento)

5 Large N Truncation of SU(N) Lattice Gauge Theory

Speaker: Anthony Ciavarella (Lawrence Berkeley National Lab)

12:30 Lunch Break

6 Composite particle spectroscopy in the Hamiltonian approach

Speaker: Etsuko Itou (RIKEN)

7 Digitised Hamiltonian SU(2) Lattice Gauge Theories at Weak Couplings

Speaker: Timo Jakobs

15:00 Coffee Break

8 Strongly Coupled QCD on a Quantum Annealer

Speaker: Thomas Luu (IAS-4, Forschungszentrum Jülich)

9 Loop-String Formulation of SU(3) (t.b.c)

Speaker: Dr Jesse Stryker (Lawrence Berkeley National Laboratory)

10 Discussion

Speakers: Carsten Urbach (University of Bonn), Enrique Ortega (University of the Basque Country UPV/EHU), Giuseppe Magnifico (University of Bari), Dr Simone Romiti (Uni-Bern)

Tuesday 2 September

11 Quantum Computing and Applications for Lattice Gauge Theories

Speaker: Christian Bauer (LBNL)

12 Matching Lagrangian and Hamiltonian Simulations in (2+1)-dimensional U(1) Gauge Theory

Speaker: Christiane Franziska Groß (HISKP, Uni Bonn)

10:30 Coffee break

13 Universal Protocol for Quantum Simulation of Gauge Theories in Arbitrary Dimensions and Gauge Groups

Speaker: Masanori Hanada (Queen Mary University of London)

14 Simulating SU(2) Yang-Mills Theory with near-term VQE methods

Speaker: Klaus Liegener (Walther-Meßner Institute / Technical University of Munich)

12:00 Lunch

15 A Quantum Link Model with Heavy Hex Topology

Speaker: Uwe-Jens Wiese (University of Bern, Switzerland)

16 Duality and entanglement in lattice gauge theories (t.b.c)

Speaker: Andrea Bulgarelli (University of Turin and INFN Turin)

17 Smart quantum simulations: relaxing requirements using quantum-inspired, classical algorithms

Speaker: Luca Dellantonio (Exeter University)

18 Convergence and Efficiency of Quantum Imaginary Time Evolution

Speaker: Tobias Hartung

19 Poster Session

Speakers: Alessio Negro (University of Bonn, HISKP), Andrea Basilio Rava, Florian Meinecke (Universität Bonn, Institut für Numerische Simulation), Giovanni Pederiva, Jinglei Zhang (University of Waterloo), Martina Gisti (Università di Bonn), Thomas Luu (IAS-4, Forschungszentrum Jülich)

18:30 Social Dinner (location and time to be decided)

Coffee break

Wednesday 3 September

20 Selected topics in tensor networks

Speaker: Stefan Kühn (DESY, CQTA)

21 String Breaking and Glueball Formation in 2+1D Lattice Gauge Theories

Speaker: Jad Halimeh (Ludwig Maximilian University of Munich)

10:30 Coffee break

22 Critical behavior of the Schwinger model via gauge-invariant variational uniform matrix product states

Speaker: Takuya Okuda (University of Tokyo)

23 Nonperturbative signatures of fractons in the twisted multi-flavor Schwinger model

Speaker: Pavel Popov (ICFO)

24 Static Quark Potential in a SU(2) Quantum Link Model (t.b.c)

Speaker: Paul Ludwig (University of Bonn)

12:30 Lunch break

25 Neural quantum states for SU(2) lattice gauge theory

Speaker: Thomas Spriggs (TU Delft, QuTech)

26 Non-abelian (1+1)d gauge theories using infinite matrix product states

Speaker: Benjamin Søgaard (Princeton)

15:00 Coffee Break

27 TBA Johann Ostmeyer / Marko Malezic ‘improved time evolution’

28 Discussion session

Thursday 4 September

29 The QCCD trapped-ion architecture and its benefits for Lattice Gauge Theories

Speaker: Enrico Rinaldi (Quantinuum Ltd.)

30 Renormalized dual basis for scalable simulations of (2+1)D compact quantum electrodynamics

Speaker: Marc Miranda-Riaza (Universitat Autònoma de Barcelona)

10:30 Coffee

31 How many states are gauge-invariant?

Speakers: Alessandro Mariani (University of Bern), Alessandro Mariani

32 Spontaneously Broken Non-Invertible Symmetries in Transverse-Field Ising Qudit Chains

Speaker: Sergej Moroz (Karlstad University)

12:00 Lunch break

13:30 Free afternoon: hiking, etc.

Friday 5 September

33 Summary of the organizers

Speakers: Carsten Urbach (University of Bonn), Enrique Ortega (University of the Basque Country UPV/EHU), Giuseppe Magnifico (University of Bari), Karl Jansen (DESY Zeuthen / CQTA), Randy Lewis (York University), Dr Simone Romiti (Uni-Bern)

10:00 Coffee break

34 Concluding discussion

12:00 Lunch break and end of the workshop