Shanghai Univ, Int Ctr Quantum Artificial Intelligence Sci & Tec, Shanghai 200444 - Peoples R China
 Shanghai Univ, Phys Dept, Shanghai 200444 - Peoples R China
 Ikerbasque, Basque Fdn Sci, Maria Diaz de Haro 3, Bilbao 48013 - Spain
Número total de Afiliações: 7
Tipo de documento:
DEC 27 2019.
Citações Web of Science:
We introduce the concept of degree of quantumness in quantum synchronization, a measure of the quantum nature of synchronization in quantum systems. Following techniques from quantum information, we propose the number of non-commuting observables that synchronize as a measure of quantumness. This figure of merit is compatible with already existing synchronization measurements, and it captures different physical properties. We illustrate it in a quantum system consisting of two weakly interacting cavity-qubit systems, which are coupled via the exchange of bosonic excitations between the cavities. Moreover, we study the synchronization of the expectation values of the Pauli operators and we propose a feasible superconducting circuit setup. Finally, we discuss the degree of quantumness in the synchronization between two quantum van der Pol oscillators. (AU)