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arXiv · 2607.00583

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

Justin Zhengjie Tan·Frank Großmann·Yiying Yan·Maxim Gelin·Yang Zhao
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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 D$_2$ 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.

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Justin Zhengjie Tan, Frank Großmann, Yiying Yan, Maxim Gelin, Yang Zhao. 2026-07-01. Open Quantum Systems Driven by Chirped Pulses: Quantized versus Semiclassical Fields and the Validity of the Rotating-Wave Approximation. https://doi.org/10.1021/acs.jpclett.6c01634

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