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Synchronization effects in a periodically driven two-level system
Tekijät: Settimo, Federico; Vacchini, Bassano
Kustantaja: American Physical Society (APS)
Julkaisuvuosi: 2026
Lehti: Physical Review A
Artikkelin numero: 022213
Vuosikerta: 113
Numero: 2
ISSN: 2469-9926
eISSN: 2469-9934
DOI: https://doi.org/10.1103/cswq-l3c8
Julkaisun avoimuus kirjaamishetkellä: Ei avoimesti saatavilla
Julkaisukanavan avoimuus : Osittain avoin julkaisukanava
Verkko-osoite: https://doi.org/10.1103/cswq-l3c8
Preprintin osoite: https://arxiv.org/abs/2511.04339
We study phase synchronization in a driven two-level system coupled to a non-Markovian bosonic reservoir. The dynamics is described by treating the system-bath coupling and the coherent drive without invoking the rotating-wave approximation, and simulated using the numerically exact hierarchical equations of motion. We observe that a robust phase locking develops and that the corresponding synchronization measure rapidly acquires a finite value when the system is tuned to what we identify as a resonant-ratio condition, namely, when the ratio between the drive amplitude and its frequency coincides with a zero of the Bessel function J0. We provide an explanation for this phenomenon by means of a static approximation derived from a Fourier analysis of the periodically driven Hamiltonian.
Julkaisussa olevat rahoitustiedot:
F.S. acknowledges support from Magnus Ehrnroothin Saeaetioe. B.V. acknowledges support from MUR and Next Generation EU via the PRIN 2022 Project "Quantum Reservoir Computing (QuReCo) " (Contract No. 2022FEXLYB) and the NQSTI-Spoke1-BaC project QuSynKrono (Contract No. PE00000023-QuSynKrono) .
