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Title: Dressed Ion-Pair States of an Ultralong-Range Rydberg Molecule

Abstract

We predict the existence of a universal class of ultralong-range Rydberg molecular states whose vibrational spectra form trimmed Rydberg series. A dressed ion-pair model captures the physical origin of these exotic molecules, accurately predicts their properties, and reveals features of ultralong-range Rydberg molecules and heavy Rydberg states with a surprisingly small Rydberg constant. The latter is determined by the small effective charge of the dressed anion, which outweighs the contribution of the molecule’s large reduced mass. This renders these molecules the only known few-body systems to have a Rydberg constant smaller than R∞/2.

Authors:
ORCiD logo; ORCiD logo; ORCiD logo;
Publication Date:
Research Org.:
Purdue Univ., West Lafayette, IN (United States)
Sponsoring Org.:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
OSTI Identifier:
1661741
Alternate Identifier(s):
OSTI ID: 1670707
Grant/Contract Number:  
SC0012193
Resource Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 125 Journal Issue: 12; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; Atomic & molecular structure; Chemical binding; Cold and ultracold molecules; Long-range interactions; Exotic atoms & molecules; Rydberg atoms & molecules

Citation Formats

Giannakeas, P., Eiles, Matthew T., Robicheaux, F., and Rost, Jan M. Dressed Ion-Pair States of an Ultralong-Range Rydberg Molecule. United States: N. p., 2020. Web. doi:10.1103/PhysRevLett.125.123401.
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Giannakeas, P., Eiles, Matthew T., Robicheaux, F., & Rost, Jan M. Dressed Ion-Pair States of an Ultralong-Range Rydberg Molecule. United States. https://doi.org/10.1103/PhysRevLett.125.123401
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Giannakeas, P., Eiles, Matthew T., Robicheaux, F., and Rost, Jan M. Wed . "Dressed Ion-Pair States of an Ultralong-Range Rydberg Molecule". United States. https://doi.org/10.1103/PhysRevLett.125.123401.
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@article{osti_1661741,
title = {Dressed Ion-Pair States of an Ultralong-Range Rydberg Molecule},
author = {Giannakeas, P. and Eiles, Matthew T. and Robicheaux, F. and Rost, Jan M.},
abstractNote = {We predict the existence of a universal class of ultralong-range Rydberg molecular states whose vibrational spectra form trimmed Rydberg series. A dressed ion-pair model captures the physical origin of these exotic molecules, accurately predicts their properties, and reveals features of ultralong-range Rydberg molecules and heavy Rydberg states with a surprisingly small Rydberg constant. The latter is determined by the small effective charge of the dressed anion, which outweighs the contribution of the molecule’s large reduced mass. This renders these molecules the only known few-body systems to have a Rydberg constant smaller than R∞/2.},
doi = {10.1103/PhysRevLett.125.123401},
journal = {Physical Review Letters},
number = 12,
volume = 125,
place = {United States},
year = {Wed Sep 16 00:00:00 EDT 2020},
month = {Wed Sep 16 00:00:00 EDT 2020}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevLett.125.123401
Copyright Statement
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Figures / Tables:

FIG. 1 FIG. 1: (a) ΣRb2 Rydberg molecule PECs (blue) relative to the n = 30 manifold. The smooth orange curves overlaid are the results of the model, Eq. (2), and the ion-atom polarization potential is shown in gray. (b) Electronic wave functions ΨΣ(z, ρ) in cylindrical coordinates are depicted for themore » family of L ≥ 2 states. The left column shows ρ $\sqrt{|Ψ_Σ(z, ρ)|}$ for z ∈ [−2000, 2000] and ρ ∈ [−2000, 2000] . The right column shows $\sqrt{|Ψ_Σ(z, ρ)|}$ for z ∈ [−250, 300] and ρ ∈ [−250, 250] . The blue (orange) dot indicates the position of the Rydberg core (perturber). (c) A schematic of the vibrational Rydberg series. The electron-ion potential (gray) supports the bound states of the Rydberg atom (I). Each electronic Rydberg manifold labeled n, n+ 1,… (blue dashed lines) is the threshold for the M = 2D-wave PEC (black). This PEC supports a nuclear Rydberg series (orange dotted lines) of dressed ion-pair states (II) labeled v − 1, v,…. (d) Two pictures of a ULRM: on top, the typical picture, where the Rydberg electron (red) scatters from the perturber (orange) and forms a trilobitelike wave function (black contour). On the bottom, the dressed ion-pair picture, wherein the Rydberg wave function is neglected and the relevant quantity is the electron’s charge distribution (red) around the perturber, forming a dressed anion.« less
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