Control of populations of two-level systems by a single resonant laser pulse
We present a simple approach allowing one to obtain analytical expressions for laser pulses that can drive a two-level system in an arbitrarily chosen way. The proposed scheme relates every desired population-evolution path to a single resonant laser pulse. It allows one to drive the system from any...
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| Autori principali: | , |
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| Natura: | Article (Journal) |
| Lingua: | inglese |
| Pubblicazione: |
9 September 2014
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| In: |
Physical review. A, Atomic, molecular, and optical physics
Year: 2014, Volume: 90, Fascicolo: 3 |
| ISSN: | 1094-1622 |
| DOI: | 10.1103/PhysRevA.90.035401 |
| Accesso online: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevA.90.035401 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevA.90.035401 
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| Note sull'autore: | Nikolay V. Golubev and Alexander I. Kuleff |
| Riassunto: | We present a simple approach allowing one to obtain analytical expressions for laser pulses that can drive a two-level system in an arbitrarily chosen way. The proposed scheme relates every desired population-evolution path to a single resonant laser pulse. It allows one to drive the system from any initial superposition of the two states to a final state having the desired distribution of the populations. We exemplify the scheme with a concrete example, where the system is driven from a nonstationary superposition of states to one of its eigenstates. We argue that the proposed approach may have interesting applications for designing pulses that can control ultrafast charge-migration processes in molecules. Although focused on laser-driven population control, the results obtained are general and could be applied for designing other types of control fields. |
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| Descrizione del documento: | Gesehen am 03.09.2020 |
| Descrizione fisica: | Online Resource |
| ISSN: | 1094-1622 |
| DOI: | 10.1103/PhysRevA.90.035401 |