# Séminaire du LPTMS: Beatriz Seoane Bartolomé & Ulisse Ferrari

**Phase transitions in computer simulations : the Tethered Monte Carlo method**

### Beatriz Seoane Bartolomé (LPT-ENS, Paris)

In this talk, I will present a powerful Monte Carlo method that I developed during my PhD [1,2] and extended recently [3], designed to efficiently study phase transitions at equilibrium. The principle is very simple, by means of external constraints to the system, we are able to avoid the traditional critical (exponential) slowing down associated to the second (first) order transition, and thus reach much larger system sizes than with traditional methods. Furthermore, the reconstruction of the constrained free energy is much simpler than in other similar methods, such as the famous Umbrella Sampling, allowing us to both fix multiple constraints at the same time, and to extract magnitudes such as the inter-facial free energy with an unusual high precision. In particular, I will discuss the Tethered Monte Carlo strategy in the context of a toy model for crystalline porous media [3].

[2] Phys. Rev. Lett. 108, 165701 (2012).

[3] The Journal of Chemical Physics 147 , 084704 (2017).

## Statistical Physics-inspired models of biological network: collective behavior in neuronal ensembles

### Ulisse Ferrari (Institut de la Vision, Inserm & UPMC)

**Date/Time : ** 06/02/2018 - *11:00 - 12:00*

**Location : ** LPTMS, salle 201, 2ème étage, Bât 100, Campus d'Orsay

#### Upcoming seminars

- Séminaire du LPTMS: Erik Aurell - 4 Sep 2018 - 11:00
- Soutenance de thèse: Kirill Plekhanov - 7 Sep 2018 - 09:30
- Séminaire du LPTMS: Arthur Goetschy - 25 Sep 2018 - 11:00
- Séminaire du LPTMS: Herbert Spohn - 13 Nov 2018 - 11:00