Ultracold Chemical Reactions of a Single Rydberg Atom in a Dense Gas

Within a dense environment (ρ≈10^{14} atoms/cm^{3}) at ultracold temperatures (T<1 μK), a single atom excited to a Rydberg state acts as a reaction center for surrounding neutral atoms. At these temperatures, almost all neutral atoms within the Rydberg orbit are bound to the Rydberg core and in...

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Autores principales:	Michael Schlagmüller, Tara Cubel Liebisch, Felix Engel, Kathrin S. Kleinbach, Fabian Böttcher, Udo Hermann, Karl M. Westphal, Anita Gaj, Robert Löw, Sebastian Hofferberth, Tilman Pfau, Jesús Pérez-Ríos, Chris H. Greene
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Lenguaje:	EN
Publicado:	American Physical Society 2016
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/a3a414c532ad4447a54f377b696348db
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spelling	oai:doaj.org-article:a3a414c532ad4447a54f377b696348db2021-12-02T11:17:33ZUltracold Chemical Reactions of a Single Rydberg Atom in a Dense Gas10.1103/PhysRevX.6.0310202160-3308https://doaj.org/article/a3a414c532ad4447a54f377b696348db2016-08-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.6.031020http://doi.org/10.1103/PhysRevX.6.031020https://doaj.org/toc/2160-3308Within a dense environment (ρ≈10^{14} atoms/cm^{3}) at ultracold temperatures (T<1 μK), a single atom excited to a Rydberg state acts as a reaction center for surrounding neutral atoms. At these temperatures, almost all neutral atoms within the Rydberg orbit are bound to the Rydberg core and interact with the Rydberg atom. We have studied the reaction rate and products for nS ^{87}Rb Rydberg states, and we mainly observe a state change of the Rydberg electron to a high orbital angular momentum l, with the released energy being converted into kinetic energy of the Rydberg atom. Unexpectedly, the measurements show a threshold behavior at n≈100 for the inelastic collision time leading to increased lifetimes of the Rydberg state independent of the densities investigated. Even at very high densities (ρ≈4.8×10^{14} cm^{-3}), the lifetime of a Rydberg atom exceeds 10 μs at n>140 compared to 1 μs at n=90. In addition, a second observed reaction mechanism, namely, Rb_{2}^{+} molecule formation, was studied. Both reaction products are equally probable for n=40, but the fraction of Rb_{2}^{+} created drops to below 10% for n≥90.Michael SchlagmüllerTara Cubel LiebischFelix EngelKathrin S. KleinbachFabian BöttcherUdo HermannKarl M. WestphalAnita GajRobert LöwSebastian HofferberthTilman PfauJesús Pérez-RíosChris H. GreeneAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 6, Iss 3, p 031020 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Michael Schlagmüller Tara Cubel Liebisch Felix Engel Kathrin S. Kleinbach Fabian Böttcher Udo Hermann Karl M. Westphal Anita Gaj Robert Löw Sebastian Hofferberth Tilman Pfau Jesús Pérez-Ríos Chris H. Greene Ultracold Chemical Reactions of a Single Rydberg Atom in a Dense Gas
description	Within a dense environment (ρ≈10^{14} atoms/cm^{3}) at ultracold temperatures (T<1 μK), a single atom excited to a Rydberg state acts as a reaction center for surrounding neutral atoms. At these temperatures, almost all neutral atoms within the Rydberg orbit are bound to the Rydberg core and interact with the Rydberg atom. We have studied the reaction rate and products for nS ^{87}Rb Rydberg states, and we mainly observe a state change of the Rydberg electron to a high orbital angular momentum l, with the released energy being converted into kinetic energy of the Rydberg atom. Unexpectedly, the measurements show a threshold behavior at n≈100 for the inelastic collision time leading to increased lifetimes of the Rydberg state independent of the densities investigated. Even at very high densities (ρ≈4.8×10^{14} cm^{-3}), the lifetime of a Rydberg atom exceeds 10 μs at n>140 compared to 1 μs at n=90. In addition, a second observed reaction mechanism, namely, Rb_{2}^{+} molecule formation, was studied. Both reaction products are equally probable for n=40, but the fraction of Rb_{2}^{+} created drops to below 10% for n≥90.
format	article
author	Michael Schlagmüller Tara Cubel Liebisch Felix Engel Kathrin S. Kleinbach Fabian Böttcher Udo Hermann Karl M. Westphal Anita Gaj Robert Löw Sebastian Hofferberth Tilman Pfau Jesús Pérez-Ríos Chris H. Greene
author_facet	Michael Schlagmüller Tara Cubel Liebisch Felix Engel Kathrin S. Kleinbach Fabian Böttcher Udo Hermann Karl M. Westphal Anita Gaj Robert Löw Sebastian Hofferberth Tilman Pfau Jesús Pérez-Ríos Chris H. Greene
author_sort	Michael Schlagmüller
title	Ultracold Chemical Reactions of a Single Rydberg Atom in a Dense Gas
title_short	Ultracold Chemical Reactions of a Single Rydberg Atom in a Dense Gas
title_full	Ultracold Chemical Reactions of a Single Rydberg Atom in a Dense Gas
title_fullStr	Ultracold Chemical Reactions of a Single Rydberg Atom in a Dense Gas
title_full_unstemmed	Ultracold Chemical Reactions of a Single Rydberg Atom in a Dense Gas
title_sort	ultracold chemical reactions of a single rydberg atom in a dense gas
publisher	American Physical Society
publishDate	2016
url	https://doaj.org/article/a3a414c532ad4447a54f377b696348db
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Ultracold Chemical Reactions of a Single Rydberg Atom in a Dense Gas

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