5 papers
Variational reduction of homogenous Lagrangian systems
Javier Fernández, Sergio Grillo, Juan Carlos Marrero +1
In this paper we show that a variational reduction procedure can be defined for Lagrangian systems subject to scaling symmetries (i.e. Lagrangian systems defined by a homogenous La…
Robust certification of high-dimensional quantum devices
Javier Fernández, Albert Rico, David Viedma +6
Certifying quantum behavior from classically accessible data is essential for secure communication and scalable quantum technologies. While powerful certification methods such as B…
Lagrangian reduction of symmetric discrete mechanical systems: a survey
Matías I. Caruso, Javier Fernández, Cora Tori +1
In this note we survey some of our results on the Lagrangian reduction of discrete-time mechanical systems (DMSs). It is intended as an introduction to the general ideas that we us…
Exponential decay of correlations at high temperature in nonlinear sigma models
Margherita Disertori, Javier Durán Fernández, Luca Fresta
We consider a family of nonlinear sigma models on whose target space is the hyperbolic super manifold , , introduced by Crawford as an extension of…
Remarks on structures and preservation in forced discrete mechanical systems of Routh type
Matías I. Caruso, Javier Fernández, Cora Tori +1
We study a type of forced discrete mechanical system -- that we name of Routh type -- whose (discrete) time-flow preserves a symplectic structure on . That…