Open Quantum Systems Driven by Chirped Pulses: Quantized versus Semiclassical Fields and the Validity of the Rotating-Wave Approximation.

Authors

Justin Zhengjie Tan, Frank Großmann, Yiying Yan, Maxim Gelin, Yang Zhao

Published in

The journal of physical chemistry letters. Jun 18, 2026. Epub Jun 18, 2026.

Abstract

Population transfer via chirped rapid adiabatic passage is studied using open quantum and semiclassical models, with and without the rotating-wave approximation. A time-dependent variational approach based on the multiple-Davydov D₂ trial state is employed to simulate the quantum models with an arbitrary finite mean photon number. We examine the accuracy of both the semiclassical field description and the rotating-wave approximation. Robust population transfer is identified over a wide parameter regime controlled by the laser spectral chirp and is found to be insensitive to the spin-phonon coupling strength, Gaussian pulse area, and energy gap of the two-level system.

PMID:
42315978
Bibliographic data and abstract were imported from PubMed on 19 Jun 2026.

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