Turin Lattice Meeting 2025

Contribution List

2. Finite density QCD phase structure from lattice simulations: some recent results

Paolo Parotto (Istituto Nazionale di Fisica Nucleare)

22/12/2025, 09:15

Talk

Talks

First principle investigations are of fundamental interest for the study of QCD thermodynamics, both in their own right and in light of experimental measurements, from heavy-ion collisions and future observations from gravitational waves. Though not much is known quantitatively about the phase structure of QCD, a lot of progress has been made in the exploration of QCD thermodynamics. I will...

6. Analytic continuation from imaginary chemical potential as an inverse problem

Marco Aliberti (Università degli Studi di Parma and INFN)

22/12/2025, 09:45

Talk

Talks

Because of the sign problem, simulations of lattice QCD at finite density are often carried out using imaginary baryon chemical potentials. This creates the challenge of analytically continuing those results to physically relevant real values.
Our group recently proposed a technique for performing this continuation by employing the Cauchy integral formula to reframe it as an inverse problem:...

5. Constrained Symplectic Quantization: a new method for real-time dynamics

Martina Giachello (Istituto Nazionale di Fisica Nucleare)

22/12/2025, 10:15

Talk

Talks

We introduce Symplectic Quantization, a novel functional approach to quantum field theory that makes it possible to sample quantum fluctuations directly in Minkowski space--time, thus bypassing the limitations of traditional importance-sampling methods restricted to imaginary time. The technique is based on a deterministic dynamics governed by Hamilton-like equations in an auxiliary time...

4. Quantum gravity from the replica trick

Andrea Bulgarelli (University of Bonn)

22/12/2025, 11:15

Talk

Talks

Replicated geometries, both in the continuum and on the lattice, are used to study entanglement in quantum field theories. In this talk we show how to gauge the permutation symmetry of a replicated system on the lattice by introducing a background gauge field. After providing a local action for the gauge field, we discuss how this construction enables simulations of matter fields coupled to...

16. How hard is it to simulate a quantum many-body system?

paolo stornati (ICFO)

22/12/2025, 11:45

Talk

Talks

Classical simulations play a central role in many-body quantum physics, from lattice gauge theories to strongly correlated systems, yet their computational cost varies dramatically across different regimes. In this talk, I will discuss how the complexity of simulating quantum many-body systems can be understood in terms of physical resources carried by quantum states.
I will first review...

10. Space time tensor networks and temporal entropies

Luca Tagliacozzo (IFF-CSIC)

22/12/2025, 12:15

Talk

Talks

I will review how spatio-temporal tensor networks naturally arise in the computation of expectation values following quantum quenches [1], and how they encode the dynamical properties of many-body quantum systems. Particular emphasis will be given to the concept of generalized temporal entanglement [2], a quantity that captures the entanglement structure across time, provides insight into the...

11. Study of the continuum limit of the lattice step scaling function in (2+1)D U(1) Yang-Mills on the lattice

Alessio Negro (HISKP, Bonn)

22/12/2025, 14:30

Talk

Talks

We study the continuum limit of the lattice step scaling function in a $U(1)$ lattice gauge theory in the Hamiltonian formalism. We study a system with static charges in the small coupling region and provide a new finite volume scheme to take the continuum limit, given a definition of the running coupling using the inter-quark force. We are able to reach small coupling thanks to a duality...

3. Out-of-equilibrium entanglement growth in integrable field theories

Dr Emanuele Di Salvo (Karlsruhe Institute of Technology)

22/12/2025, 15:00

Talk

Talks

Entanglement is a key quantity in quantum mechanics and it has recently been central in the development of efficient tensor-network-based numerical methods, as density matrix renormalization group. They are crucial in investigating strongly interacting systems that cannot be tackled by analytical or Monte Carlo methods. However, keeping the entropy related to entanglement under control is a...

7. Variational Method in Quantum Field Theory

Mr Andrea Stampiggi (SISSA, INFN Sezione Trieste)

22/12/2025, 15:30

Talk

Talks

We develop a variational framework for addressing two-dimensional non-integrable quantum field theories through the exact structure of their integrable counterparts. Concentrating on the $\varphi^4$ Landau-Ginzburg model, we use the analytical Vacuum Expectation Values and Form Factors of local operators in the sinh-Gordon theory as the foundation of a variational ansatz. In this way, we...

12. Learning how to solve the signal-to-noise ratio problem

Dr Pietro Butti (QTC - University of Southern Denmark)

23/12/2025, 09:30

Talk

Talks

Monte Carlo simulations provide a systematically improvable framework for computing Euclidean correlation functions with high precision. However, their effectiveness is fundamentally constrained by the exponential decay of the signal-to-noise ratio at large Euclidean time separations. By expressing correlators as derivatives of one-point functions with respect to sources in the action, the...

13. A scalable flow-based approach to mitigate topological freezing

Elia Cellini (University of Edinburgh)

23/12/2025, 10:00

Talk

Talks

In recent years, flow-based samplers have emerged as a promising alternative to traditional sampling methods in lattice gauge theory. In this talk, we will introduce a class of flow-based samplers known as Stochastic Normalizing Flows (SNFs), which combine neural networks with non-equilibrium Monte Carlo algorithms. We will show that SNFs exhibit excellent scaling with the volume in lattice...

14. Interfaces Free energy in the phi^4 theory

Lorenzo Verzichelli (Universita` di Torino)

23/12/2025, 10:30

Talk

Talks

In the magnetized phase of the phi^4 theory interfaces can form between two magnetization domains each in a different spontaneously broken vacuum. When we impose anti-periodic boundary conditions in one of the directions an interface necessarily forms somewhere in the bulk.

We compute the free energy associated to these interfaces with the Jarzynski equality. And study its behavior changing...

8. Ground-State Extraction of Heavy-Light-Meson Semileptonic Decay Form Factors

Antonino D'Anna (IFT UAM-CSIC)

23/12/2025, 11:45

Talk

Talks

We discuss the extraction of form factors for heavy-light
pseudo-scalar to light pseudo-scalar decay form factors from finite time
correlation functions. Particular emphasis is placed on controlling the
contamination from excited-states using also the information from chiral
perturbation theory to isolate the ground-state contribution. The analysis is
performed on CLS ensembles with...

15. Studying the effective restoration of the $U(1)_A$ symmetry on the lattice with Wilson fermions

Antonio Smecca (Istituto Nazionale di Fisica Nucleare)

23/12/2025, 12:15

Talk

Talks

It has been argued in the literature that an effective restoration of the $U(1)_A$ symmetry can be probed by examining the degeneracy of flavour non-singlet pseudoscalar and scalar correlation functions. In this talk, I will present a method to investigate the onset of such degeneracies using correlators computed on anisotropic lattice ensembles generated by the FASTSUM collaboration with...