Ultracold and dense samples of ground-state molecules in lattice potentials

Hanns-Christoph Nägerl, Manfred J Mark, Elmar Haller, Mattias Gustavsson, Russell Hart, Johann G Danzl

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We produce an ultracold and dense sample of rovibronic ground state Cs(2) molecules close to the regime of quantum degeneracy, in a single hyperfine level, in the presence of an optical lattice. The molecules are individually trapped, in the motional ground state of an optical lattice well, with a lifetime of 8 s. For preparation, we start with a zero-temperature atomic Mott-insulator state with optimized double-site occupancy and efficiently associate weakly-bound dimer molecules on a Feshbach resonance. Despite extremely weak Franck-Condon wavefunction overlap, the molecules are subsequently transferred with >50% efficiency to the rovibronic ground state by a stimulated four-photon process. Our results present a crucial step towards the generation of Bose-Einstein condensates of ground-state molecules and, when suitably generalized to polar heteronuclear molecules such as RbCs, the realization of dipolar many-body quantum-gas phases in periodic potentials.
LanguageEnglish
Article number012015
JournalJournal of Physics Conference Series
Volume264
DOIs
Publication statusPublished - 1 Jan 2011

Fingerprint

ground state
molecules
Bose-Einstein condensates
dimers
insulators
vapor phases
life (durability)
preparation
photons
temperature

Keywords

  • lattice potentials
  • quantum degeneracy
  • Feshbach resonance
  • optical lattice
  • optics

Cite this

Nägerl, Hanns-Christoph ; Mark, Manfred J ; Haller, Elmar ; Gustavsson, Mattias ; Hart, Russell ; Danzl, Johann G. / Ultracold and dense samples of ground-state molecules in lattice potentials. In: Journal of Physics Conference Series. 2011 ; Vol. 264.
@article{124cc11ebd21486fa9ef46b8765de412,
title = "Ultracold and dense samples of ground-state molecules in lattice potentials",
abstract = "We produce an ultracold and dense sample of rovibronic ground state Cs(2) molecules close to the regime of quantum degeneracy, in a single hyperfine level, in the presence of an optical lattice. The molecules are individually trapped, in the motional ground state of an optical lattice well, with a lifetime of 8 s. For preparation, we start with a zero-temperature atomic Mott-insulator state with optimized double-site occupancy and efficiently associate weakly-bound dimer molecules on a Feshbach resonance. Despite extremely weak Franck-Condon wavefunction overlap, the molecules are subsequently transferred with >50{\%} efficiency to the rovibronic ground state by a stimulated four-photon process. Our results present a crucial step towards the generation of Bose-Einstein condensates of ground-state molecules and, when suitably generalized to polar heteronuclear molecules such as RbCs, the realization of dipolar many-body quantum-gas phases in periodic potentials.",
keywords = "lattice potentials , quantum degeneracy, Feshbach resonance , optical lattice , optics",
author = "Hanns-Christoph N{\"a}gerl and Mark, {Manfred J} and Elmar Haller and Mattias Gustavsson and Russell Hart and Danzl, {Johann G}",
year = "2011",
month = "1",
day = "1",
doi = "10.1088/1742-6596/264/1/012015",
language = "English",
volume = "264",
journal = "Journal of Physics: Conference Series",
issn = "1742-6588",

}

Ultracold and dense samples of ground-state molecules in lattice potentials. / Nägerl, Hanns-Christoph; Mark, Manfred J; Haller, Elmar; Gustavsson, Mattias; Hart, Russell; Danzl, Johann G.

In: Journal of Physics Conference Series, Vol. 264, 012015, 01.01.2011.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Ultracold and dense samples of ground-state molecules in lattice potentials

AU - Nägerl, Hanns-Christoph

AU - Mark, Manfred J

AU - Haller, Elmar

AU - Gustavsson, Mattias

AU - Hart, Russell

AU - Danzl, Johann G

PY - 2011/1/1

Y1 - 2011/1/1

N2 - We produce an ultracold and dense sample of rovibronic ground state Cs(2) molecules close to the regime of quantum degeneracy, in a single hyperfine level, in the presence of an optical lattice. The molecules are individually trapped, in the motional ground state of an optical lattice well, with a lifetime of 8 s. For preparation, we start with a zero-temperature atomic Mott-insulator state with optimized double-site occupancy and efficiently associate weakly-bound dimer molecules on a Feshbach resonance. Despite extremely weak Franck-Condon wavefunction overlap, the molecules are subsequently transferred with >50% efficiency to the rovibronic ground state by a stimulated four-photon process. Our results present a crucial step towards the generation of Bose-Einstein condensates of ground-state molecules and, when suitably generalized to polar heteronuclear molecules such as RbCs, the realization of dipolar many-body quantum-gas phases in periodic potentials.

AB - We produce an ultracold and dense sample of rovibronic ground state Cs(2) molecules close to the regime of quantum degeneracy, in a single hyperfine level, in the presence of an optical lattice. The molecules are individually trapped, in the motional ground state of an optical lattice well, with a lifetime of 8 s. For preparation, we start with a zero-temperature atomic Mott-insulator state with optimized double-site occupancy and efficiently associate weakly-bound dimer molecules on a Feshbach resonance. Despite extremely weak Franck-Condon wavefunction overlap, the molecules are subsequently transferred with >50% efficiency to the rovibronic ground state by a stimulated four-photon process. Our results present a crucial step towards the generation of Bose-Einstein condensates of ground-state molecules and, when suitably generalized to polar heteronuclear molecules such as RbCs, the realization of dipolar many-body quantum-gas phases in periodic potentials.

KW - lattice potentials

KW - quantum degeneracy

KW - Feshbach resonance

KW - optical lattice

KW - optics

UR - http://stacks.iop.org/1742-6596/264/i=1/a=012015?key=crossref.39ffb55779d6ea741f07b32667718685

U2 - 10.1088/1742-6596/264/1/012015

DO - 10.1088/1742-6596/264/1/012015

M3 - Article

VL - 264

JO - Journal of Physics: Conference Series

T2 - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

M1 - 012015

ER -