184 citations · 311 across the 3 of their papers we have counts for
5 papers
On the role of joint probability distributions of incompatible observables in Bell and Kochen-Specker Theorems
Ángel Rivas
We analyze the validity of Bell and Kochen-Specker theorems under local (or noncontextual) realism but avoiding an assumption of the existence of a joint probability distribution f…
Two-Dimensional Density-Matrix Topological Fermionic Phases: Topological Uhlmann Numbers
O. Viyuela, A. Rivas, M. A. Martin-Delgado
We construct a topological invariant that classifies density matrices of symmetry-protected topological orders in two-dimensional fermionic systems. As it is constructed out of the…
Uhlmann Phase as a Topological Measure for One-Dimensional Fermion Systems
O. Viyuela, A. Rivas, M. A. Martin-Delgado
We introduce the Uhlmann geometric phase as a tool to characterize symmetry-protected topological phases in 1D fermion systems, such as topological insulators and superconductors.…
Dynamics of Thermal Effects in the Spin-Wave Theory of Quantum Antiferromagnets
Ángel Rivas, Miguel A. Martin-Delgado
We derive a master equation that allows us to study non-equilibrium dynamics of a quantum antiferromagnet. By resorting to spin-wave theory, we obtain a closed analytic form for th…
Generalized Toric Codes Coupled to Thermal Baths
O. Viyuela, A. Rivas, M. A. Martin-Delgado
We have studied the dynamics of a generalized toric code based on qudits at finite temperature by finding the master equation coupling the code's degrees of freedom to a thermal ba…