13 citations · 24 across the 3 of their papers we have counts for
4 papers · 1 filter
In and out of equilibrium quantum metrology with mean-field quantum criticality
Sascha Wald, Saulo V. Moreira, Fernando L. Semião
We study the influence that collective transition phenomena have on quantum metrological protocols. The single spherical quantum spin (SQS) serves as stereotypical toy model that a…
Dynamical chaotic phases and constrained quantum dynamics
André M. Timpanaro, Sascha Wald, Fernando Semião +1
In classical mechanics, external constraints on the dynamical variables can be easily implemented within the Lagrangian formulation. Conversely, the extension of this idea to the q…
Energy barriers between metastable states in first order quantum phase transitions
Sascha Wald, Andre Timpanaro, Cecilia Cormick +1
A system of neutral atoms trapped in an optical lattice and dispersively coupled to the field of an optical cavity can realize a variation of the Bose-Hubbard model with infinite-r…
Lindblad dynamics of the quantum spherical model
Sascha Wald, Gabriel T. Landi, Malte Henkel
The purely relaxational non-equilibrium dynamics of the quantum spherical model as described through a Lindblad equation is analysed. It is shown that the phenomenological requirem…