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Chirped laser pulses for rapid adiabatic passage in trapped ions

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Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2025, Tutors: Juan José García Ripoll, Bruno Juliá Díaz

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This work investigates the use of chirped picosecond laser pulses to induce rapid adiabatic passage (RAP) in a single trapped ion, aiming for population inversion between two quantum states. A theoretical framework for RAP linearly chirped pulses is developed, and a novel method to characterise ultrashort pulses is introduced. Numerical simulations solving the Schrödinger equation confirm that RAP leads to state transitions with 100% probability in the resonant regime, independent of the pulse area. The effects of a detuning between the transition and pulse frequencies on the transition probability are also analysed, revealing a linear dependence
between the transition probability curve size and the pulse width.

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Chirped laser pulses for rapid adiabatic passage in trapped ions