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Capture dynamics of ultracold atoms in the presence of an impurity ion.

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Title: Capture dynamics of ultracold atoms in the presence of an impurity ion.
Authors: J M Schurer1,2 jschurer@physnet.uni-hamburg.de, A Negretti1,2, P Schmelcher1,2
Source: New Journal of Physics. Aug2015, Vol. 17 Issue 8, p1-1. 1p.
Subjects: Impurity-dislocation interactions, Ultracold molecules, Bosons, Transmutation (Chemistry), Analytical mechanics
Abstract: We explore the quantum dynamics of a one-dimensional trapped ultracold ensemble of bosonic atoms triggered by the sudden creation of a single ion. The numerical simulations are performed by means of the ab initio multiconfiguration time-dependent Hartree method for bosons which takes into account all correlations. The dynamics is analyzed via a cluster expansion approach, adapted to bosonic systems of fixed particle number, which provides a comprehensive understanding of the occurring many-body processes. After a transient during which the atomic ensemble separates into fractions which are unbound and bound with respect to the ion, we observe an oscillation in the atomic density which we attribute to the additional length and energy scale induced by the attractive long-range atom–ion interaction. This oscillation is shown to be the main source of spatial coherence and population transfer between the bound and the unbound atomic fraction. Moreover, the dynamics exhibits collapse and revival behavior caused by the dynamical build-up of two-particle correlations demonstrating that a beyond mean-field description is indispensable. [ABSTRACT FROM AUTHOR]
Copyright of New Journal of Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 109205542
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  Data: Capture dynamics of ultracold atoms in the presence of an impurity ion.
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  Data: <searchLink fieldCode="AR" term="%22J+M+Schurer%22">J M Schurer</searchLink><relatesTo>1,2</relatesTo><i> jschurer@physnet.uni-hamburg.de</i><br /><searchLink fieldCode="AR" term="%22A+Negretti%22">A Negretti</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22P+Schmelcher%22">P Schmelcher</searchLink><relatesTo>1,2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22New+Journal+of+Physics%22">New Journal of Physics</searchLink>. Aug2015, Vol. 17 Issue 8, p1-1. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Impurity-dislocation+interactions%22">Impurity-dislocation interactions</searchLink><br /><searchLink fieldCode="DE" term="%22Ultracold+molecules%22">Ultracold molecules</searchLink><br /><searchLink fieldCode="DE" term="%22Bosons%22">Bosons</searchLink><br /><searchLink fieldCode="DE" term="%22Transmutation+%28Chemistry%29%22">Transmutation (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Analytical+mechanics%22">Analytical mechanics</searchLink>
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  Data: We explore the quantum dynamics of a one-dimensional trapped ultracold ensemble of bosonic atoms triggered by the sudden creation of a single ion. The numerical simulations are performed by means of the ab initio multiconfiguration time-dependent Hartree method for bosons which takes into account all correlations. The dynamics is analyzed via a cluster expansion approach, adapted to bosonic systems of fixed particle number, which provides a comprehensive understanding of the occurring many-body processes. After a transient during which the atomic ensemble separates into fractions which are unbound and bound with respect to the ion, we observe an oscillation in the atomic density which we attribute to the additional length and energy scale induced by the attractive long-range atom–ion interaction. This oscillation is shown to be the main source of spatial coherence and population transfer between the bound and the unbound atomic fraction. Moreover, the dynamics exhibits collapse and revival behavior caused by the dynamical build-up of two-particle correlations demonstrating that a beyond mean-field description is indispensable. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of New Journal of Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1088/1367-2630/17/8/083024
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        Text: English
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      – SubjectFull: Impurity-dislocation interactions
        Type: general
      – SubjectFull: Ultracold molecules
        Type: general
      – SubjectFull: Bosons
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      – SubjectFull: Transmutation (Chemistry)
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      – SubjectFull: Analytical mechanics
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              Text: Aug2015
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