Time-dependent spectra of quantum beats

We obtain time-resolved spectra of spontaneous emission and resonance fluorescence of a single multilevel emitter where two antiparallel transitions interfere and cause quantum beats. After rising as a single broad peak, the spontaneous emission spectrum turns into a doublet of subnatural peaks and...

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Main Authors: Héctor M. Castro-Beltrán, Ricardo Román-Ancheyta
Format: Article
Language:English
Published: American Physical Society 2025-01-01
Series:Physical Review Research
Online Access:http://doi.org/10.1103/PhysRevResearch.7.013019
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author Héctor M. Castro-Beltrán
Ricardo Román-Ancheyta
author_facet Héctor M. Castro-Beltrán
Ricardo Román-Ancheyta
author_sort Héctor M. Castro-Beltrán
collection DOAJ
description We obtain time-resolved spectra of spontaneous emission and resonance fluorescence of a single multilevel emitter where two antiparallel transitions interfere and cause quantum beats. After rising as a single broad peak, the spontaneous emission spectrum turns into a doublet of subnatural peaks and then fades for long times. For strong field resonance fluorescence, the beat signature is the formation of doublet sidebands, which initially grow asymmetrically but end up symmetrical. We stress the filter bandwidth's crucial role in the spectral resolution and causal evolution.
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publisher American Physical Society
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spelling doaj-art-e6e3c449b3a648249bcc9206b7e180e52025-01-06T15:19:55ZengAmerican Physical SocietyPhysical Review Research2643-15642025-01-017101301910.1103/PhysRevResearch.7.013019Time-dependent spectra of quantum beatsHéctor M. Castro-BeltránRicardo Román-AncheytaWe obtain time-resolved spectra of spontaneous emission and resonance fluorescence of a single multilevel emitter where two antiparallel transitions interfere and cause quantum beats. After rising as a single broad peak, the spontaneous emission spectrum turns into a doublet of subnatural peaks and then fades for long times. For strong field resonance fluorescence, the beat signature is the formation of doublet sidebands, which initially grow asymmetrically but end up symmetrical. We stress the filter bandwidth's crucial role in the spectral resolution and causal evolution.http://doi.org/10.1103/PhysRevResearch.7.013019
spellingShingle Héctor M. Castro-Beltrán
Ricardo Román-Ancheyta
Time-dependent spectra of quantum beats
Physical Review Research
title Time-dependent spectra of quantum beats
title_full Time-dependent spectra of quantum beats
title_fullStr Time-dependent spectra of quantum beats
title_full_unstemmed Time-dependent spectra of quantum beats
title_short Time-dependent spectra of quantum beats
title_sort time dependent spectra of quantum beats
url http://doi.org/10.1103/PhysRevResearch.7.013019
work_keys_str_mv AT hectormcastrobeltran timedependentspectraofquantumbeats
AT ricardoromanancheyta timedependentspectraofquantumbeats