Λ-enhanced grey molasses on the D2 transition of Rubidium-87 atoms

Abstract Laser cooling based on dark states, i.e. states decoupled from light, has proven to be effective to increase the phase-space density of cold trapped atoms. Dark-states cooling requires open atomic transitions, in contrast to the ordinary laser cooling used for example in magneto-optical tra...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Sara Rosi, Alessia Burchianti, Stefano Conclave, Devang S. Naik, Giacomo Roati, Chiara Fort, Francesco Minardi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a6f58a1c023b49708247e209faab18c0
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:a6f58a1c023b49708247e209faab18c0
record_format	dspace
spelling	oai:doaj.org-article:a6f58a1c023b49708247e209faab18c02021-12-02T11:40:25ZΛ-enhanced grey molasses on the D2 transition of Rubidium-87 atoms10.1038/s41598-018-19814-z2045-2322https://doaj.org/article/a6f58a1c023b49708247e209faab18c02018-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-19814-zhttps://doaj.org/toc/2045-2322Abstract Laser cooling based on dark states, i.e. states decoupled from light, has proven to be effective to increase the phase-space density of cold trapped atoms. Dark-states cooling requires open atomic transitions, in contrast to the ordinary laser cooling used for example in magneto-optical traps (MOTs), which operate on closed atomic transitions. For alkali atoms, dark-states cooling is therefore commonly operated on the D1 transition nS1/2 → nP1/2. We show that, for 87Rb, thanks to the large hyperfine structure separations the use of this transition is not strictly necessary and that “quasi-dark state” cooling is efficient also on the D2 line, 5S1/2 → 5P3/2. We report temperatures as low as (4.0 ± 0.3) μK and an increase of almost an order of magnitude in the phase space density with respect to ordinary laser sub-Doppler cooling.Sara RosiAlessia BurchiantiStefano ConclaveDevang S. NaikGiacomo RoatiChiara FortFrancesco MinardiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sara Rosi Alessia Burchianti Stefano Conclave Devang S. Naik Giacomo Roati Chiara Fort Francesco Minardi Λ-enhanced grey molasses on the D2 transition of Rubidium-87 atoms
description	Abstract Laser cooling based on dark states, i.e. states decoupled from light, has proven to be effective to increase the phase-space density of cold trapped atoms. Dark-states cooling requires open atomic transitions, in contrast to the ordinary laser cooling used for example in magneto-optical traps (MOTs), which operate on closed atomic transitions. For alkali atoms, dark-states cooling is therefore commonly operated on the D1 transition nS1/2 → nP1/2. We show that, for 87Rb, thanks to the large hyperfine structure separations the use of this transition is not strictly necessary and that “quasi-dark state” cooling is efficient also on the D2 line, 5S1/2 → 5P3/2. We report temperatures as low as (4.0 ± 0.3) μK and an increase of almost an order of magnitude in the phase space density with respect to ordinary laser sub-Doppler cooling.
format	article
author	Sara Rosi Alessia Burchianti Stefano Conclave Devang S. Naik Giacomo Roati Chiara Fort Francesco Minardi
author_facet	Sara Rosi Alessia Burchianti Stefano Conclave Devang S. Naik Giacomo Roati Chiara Fort Francesco Minardi
author_sort	Sara Rosi
title	Λ-enhanced grey molasses on the D2 transition of Rubidium-87 atoms
title_short	Λ-enhanced grey molasses on the D2 transition of Rubidium-87 atoms
title_full	Λ-enhanced grey molasses on the D2 transition of Rubidium-87 atoms
title_fullStr	Λ-enhanced grey molasses on the D2 transition of Rubidium-87 atoms
title_full_unstemmed	Λ-enhanced grey molasses on the D2 transition of Rubidium-87 atoms
title_sort	λ-enhanced grey molasses on the d2 transition of rubidium-87 atoms
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/a6f58a1c023b49708247e209faab18c0
work_keys_str_mv	AT sararosi lenhancedgreymolassesonthed2transitionofrubidium87atoms AT alessiaburchianti lenhancedgreymolassesonthed2transitionofrubidium87atoms AT stefanoconclave lenhancedgreymolassesonthed2transitionofrubidium87atoms AT devangsnaik lenhancedgreymolassesonthed2transitionofrubidium87atoms AT giacomoroati lenhancedgreymolassesonthed2transitionofrubidium87atoms AT chiarafort lenhancedgreymolassesonthed2transitionofrubidium87atoms AT francescominardi lenhancedgreymolassesonthed2transitionofrubidium87atoms
_version_	1718395663697313792

Λ-enhanced grey molasses on the D2 transition of Rubidium-87 atoms

Ejemplares similares