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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Degree of Quantumness in Quantum Synchronization

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Eneriz, H. [1, 2] ; Rossatto, D. Z. [3, 4] ; Cardenas-Lopez, F. A. [5, 6] ; Solano, E. [7, 1, 5, 6] ; Sanz, M. [1]
Total Authors: 5
[1] Univ Basque Country, UPV EHU, Dept Phys Chem, Apartado 644, Bilbao 48080 - Spain
[2] Univ Bordeaux, IOGS, CNRS, UMR 5298, LP2N, F-33400 Talence - France
[3] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil
[4] Univ Estadual Paulista Unesp, Campus Expt Itapeva, BR-18409010 Itapeva, SP - Brazil
[5] Shanghai Univ, Int Ctr Quantum Artificial Intelligence Sci & Tec, Shanghai 200444 - Peoples R China
[6] Shanghai Univ, Phys Dept, Shanghai 200444 - Peoples R China
[7] Ikerbasque, Basque Fdn Sci, Maria Diaz de Haro 3, Bilbao 48013 - Spain
Total Affiliations: 7
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 9, DEC 27 2019.
Web of Science Citations: 0

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)

FAPESP's process: 13/23512-7 - Circuit Quantum Electrodynamics: Bistability and Squeezed States
Grantee:Daniel Zini Rossatto
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 14/24576-1 - Ultrastrong and deep strong coupling regimes in circuit quantum electrodynamics
Grantee:Daniel Zini Rossatto
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor