Ricardo Puebla Antunes

Email: ricardo.puebla[at]uni-ulm.de
Tel: +49-731-50-22907
Room O25/407
Institute for Theoretical Physics
Ulm University
Albert-Einstein Allee 11
D-89081 Ulm, Germany

My Research Interests

My main research interest lies in the broad scope of non-equilibrium dynamics triggered by phase transitions. While equilibrium properties of phase transitions have been extensively studied during last decades, their dynamical consequences remain to be completely understood. As an example, a major challenge resides in understanding to what extent universal equilibrium properties of phase transitions (such as critical exponents or finite-size scaling theory) emerge in non-equilibrium dynamics. In this framework, one finds the celebrated Kibble-Zurek mechanism, which successfully explains the power-law dependence of the formed number of excitations on the velocity at which a continuous phase transition is traversed, being the scaling exponent determined solely by equilibrium critical exponents. In particular, I work in the novel concept of quantum phase transitions in finite-size systems. There, criticality appears in a limit of certain physical parameters instead of in the typical thermodynamic limit of infinitely many particles. This recent finding allows to further explore aspects of criticality in an easier and more controllable platform.

Furthermore, I am devoted as well to the study of many-body systems such as Coulomb crystals or Ising-like models, which are paradigmatic testbeds to investigate non-equilibrium statistical mechanics involving phase transitions and physics beyond Kibble-Zurek mechanism.

My Publications

Quantum phase transition and universal dynamics in the Rabi model
M.-J. Hwang, R. Puebla and M. B. Plenio
Phys. Rev. Lett. 115, 180404 (2015)

Irreversible processes without energy dissipation in an isolated Lipkin-Meshkov-Glick model
R. Puebla and A. Relaño
Phys. Rev. E 92, 012101 (2015)

Non-thermal excited-state quantum phase transitions
R. Puebla and A. Relaño
EPL 104, 50007 (2013)

Excited-state phase transition leading to symmetry-breaking steady states
 in the Dicke model
R. Puebla, A. Relaño, and J. Retamosa
Phys. Rev. A 87, 023819 (2013)

You can find here a link to my CV