2021/09/01 by Dionisis Stefanatos, Emmanuel Paspalakis
Computer Science · Mathematics · Physics and Astronomy · #Adiabatic process #Atomic physics #Coherence (philosophical gambling strategy) #Coherent control #Computational physics #Electromagnetically induced transparency #Gaussian #Laser #Laser-Matter Interactions and Applications #Mathematics #Optimal control #Photon #Physics #Population #Population transfer #Quantum Information and Cryptography #Quantum mechanics #Quantum optics and atomic interactions #Stimulated Raman adiabatic passage #physics.atom-ph #physics.optics #quant-ph
paper · pdf · doi:10.1103/physreva.104.033101
published as Physical Review A 104, 033101 (2021)
openalex publication_date 2021/09/01 · arxiv created 2021/12/27 · arxiv updated 2021/12/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We use optimal control in order to find the optimal shapes of pulses maximizing the population transfer between two bound states which are coupled via a continuum of states. We find that the optimal bounded controls acquire the bang-interior and interior-bang form, with the bang part corresponding to the maximum allowed control value and the interior part to values between zero and the maximum. Then we use numerical optimal control to obtain the switching times and the interior control values. We compare our results with those obtained using Gaussian stimulated Raman adiabatic passage pulses and find that the optimal method performs better, with the extent of improvement depending on the effective two-photon detuning and the size of incoherent losses. When we consider effective two-photon resonance, the improvement is more dramatic for larger incoherent losses, while when we take into account the effective two-photon detuning, the improvement is better for smaller incoherent losses. We also obtain how the transfer efficiency increases with increasing absolute value of the Fano factor. The present work is expected to find application in areas where the population transfer between two bound states through a continuum structure plays an important role, for example coherence effects, like population trapping and electromagnetically induced transparency, optical analogs for light waves propagating in waveguide-based photonic structures, and qubits coupled via a continuum of bosonic or waveguide modes.