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Refined Weak Coupling Limit: Coherence, Entanglement and Non-Markovianity
Ángel Rivas
We study the properties of a refined weak coupling limit that preserves complete positivity in order to describe non-Markovian dynamics in the spin-boson model. With this tool, we…
Nonlinear fiber gyroscope for quantum metrology
Alfredo Luis, Irene Morales, Ángel Rivas
We examine the performance of a nonlinear fiber gyroscope for improved signal detection beating the quantum limits of its linear counterparts. The performance is examined when the…
Observation of topological Uhlmann phases with superconducting qubits
O. Viyuela, A. Rivas, S. Gasparinetti +3
Topological insulators and superconductors at finite temperature can be characterized by the topological Uhlmann phase. However, a direct experimental measurement of this invariant…
Topological Heat Transport and Symmetry-Protected Boson Currents
Ángel Rivas, Miguel A. Martin-Delgado
The study of non-equilibrium properties in topological systems is of practical and fundamental importance. Here, we analyze the stationary properties of a two-dimensional bosonic H…
Iterative Phase Optimisation of Elementary Quantum Error Correcting Codes
M. Müller, A. Rivas, E. A. Martínez +5
Performing experiments on small-scale quantum computers is certainly a challenging endeavor. Many parameters need to be optimized to achieve high-fidelity operations. This can be d…