Digitizing ultrafast adiabatic passage with a pulse train
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866908834567553024 |
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| author | Chang, Bo Y. Sola, Ignacio R. Malinovskaya, Svetlana A. Carrasco, Sebastian C. Malinovsky, Vladimir S. |
| author_facet | Chang, Bo Y. Sola, Ignacio R. Malinovskaya, Svetlana A. Carrasco, Sebastian C. Malinovsky, Vladimir S. |
| contents | We present a digitized implementation of rapid adiabatic passage based on a train of weak, frequency-varying ultrafast pulses. Analytic conditions on the subpulse Rabi frequencies and detunings are derived to reproduce the continuous-time population dynamics of a conventional long-pulse excitation. We find that the reproduced dynamics achieves high fidelity even for pulse trains with a small number of subpulses, provided that each subpulse remains within the perturbative regime. The subpulses act as discrete samples of the underlying continuous evolution; consequently, more complex population dynamics, characterized by multiple oscillations prior to the onset of adiabaticity, require a larger number of subpulses for accurate reproduction. In addition, we demonstrate how the sidebands of a frequency comb can be exploited for resonant excitation at large carrier detuning and for the precise preparation of superposition states. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2602_13592 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Digitizing ultrafast adiabatic passage with a pulse train Chang, Bo Y. Sola, Ignacio R. Malinovskaya, Svetlana A. Carrasco, Sebastian C. Malinovsky, Vladimir S. Quantum Physics We present a digitized implementation of rapid adiabatic passage based on a train of weak, frequency-varying ultrafast pulses. Analytic conditions on the subpulse Rabi frequencies and detunings are derived to reproduce the continuous-time population dynamics of a conventional long-pulse excitation. We find that the reproduced dynamics achieves high fidelity even for pulse trains with a small number of subpulses, provided that each subpulse remains within the perturbative regime. The subpulses act as discrete samples of the underlying continuous evolution; consequently, more complex population dynamics, characterized by multiple oscillations prior to the onset of adiabaticity, require a larger number of subpulses for accurate reproduction. In addition, we demonstrate how the sidebands of a frequency comb can be exploited for resonant excitation at large carrier detuning and for the precise preparation of superposition states. |
| title | Digitizing ultrafast adiabatic passage with a pulse train |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2602.13592 |