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Paper detail

Degree of Quantumness in Quantum Synchronization

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.

preprint2019arXivOpen access
H. EnerizD. Z. RossattoF. A. Cárdenas-L'opezE. SolanoM. Sanz
nlin.AOquant-ph
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H. EnerizD. Z. RossattoF. A. Cárdenas-L'opezE. SolanoM. Sanz

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