Degenerate Landau–Zener model in the presence of quantum noise

Militello, Benedetto

doi:10.1142/s0219749919500497

Cited by 1 publication

(1 citation statement)

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“…Moreover, in Ref. [53], MS transformation is used to investigate the degenerate Landau-Zener model, which consists of two degenerate energy levels whose energies vary with time and in the existence of interactions that couple the states of the two levels in the presence of quantum noise. By converting the complex system to a twolevel system, the zero-area pulse technique can be applied to the system, and the population can be transferred from an arbitrary coherent superposition of ground states to an arbitrary coherent superposition of excited states.…”

Section: Introductionmentioning

confidence: 99%

Coherent superposition of states in degenerate systems using zero-area pulses

Saadati-Niari,

Amiri

2024

Rev. Mex. Fís.

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The coherent superposition of states in degenerate quantum systems is investigated using detuned laser pulses in which the Rabi frequencies are time-dependent, and the pulse area is zero. In this study, a quantum system with an arbitrary number of degenerate states in the ground set as well as an arbitrary number of degenerate states in the exciting set is considered. We assume that all states in the ground set are coupled to the excited states using laser pulses such that the pulse area of Rabi frequency is zero, and all of them have the same time dependence. It is also assumed that all laser pulses are in a non-resonant condition with Bohr transitions, and all detunings are the same. We will show that by applying the appropriate temporal dependence for the pulses and the appropriate rate for the detunings, the population can be transferred from an arbitrary superposition from the ground states to a desired superposition from the excited states.

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Section: Introductionmentioning

confidence: 99%