19/04/2017, 14:30 — 15:30 — Sala P9, Pavilhão de Matemática
Mikel Sanz, University of the Basque Country
Quantumness in quantum synchronization
We introduce the concept of degree of quantumness in quantum synchronization, a measure of the quantum natu re of synchronization in quantum systems. Following techniques from quantum information to quantify the quantumness of a dynamics, we propose a measure based on the number of non-commuting observables that synchronize. The degree of quantumness is compatible with already existing synchronization measurements, and it captures different physical properties. We illustrate the definition in a quantum system consisting of two weakly interacting cavity-qubit systems, which are coupled via the exchange of bosonic excitations between the cavities, and the synchronization of the expectation values of the Pauli operators is studied. We additionally propose a feasible superconducting circuit system in which the experiment can be carried out. Finally, we briefly discuss the degree of quantumness in the synchronization between two quantum van der Pol oscillators.