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Clusters in Separated Tubes of Tilted Dipoles

Armstrong, Jeremy R. ; Jensen, Aksel S. ; Volosniev, Artem G. ; Zinner, Nikolaj T. (2022):
Clusters in Separated Tubes of Tilted Dipoles. (Publisher's Version)
In: Mathematics, 8 (4), MDPI, e-ISSN 2227-7390,
DOI: 10.26083/tuprints-00016150,

Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

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Item Type: Article
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: Clusters in Separated Tubes of Tilted Dipoles
Language: English

A few-body cluster is a building block of a many-body system in a gas phase provided the temperature at most is of the order of the binding energy of this cluster. Here we illustrate this statement by considering a system of tubes filled with dipolar distinguishable particles. We calculate the partition function, which determines the probability to find a few-body cluster at a given temperature. The input for our calculations — the energies of few-body clusters — is estimated using the harmonic approximation. We first describe and demonstrate the validity of our numerical procedure. Then we discuss the results featuring melting of the zero-temperature many-body state into a gas of free particles and few-body clusters. For temperature higher than its binding energy threshold, the dimers overwhelmingly dominate the ensemble, where the remaining probability is in free particles. At very high temperatures free (harmonic oscillator trap-bound) particle dominance is eventually reached. This structure evolution appears both for one and two particles in each layer providing crucial information about the behavior of ultracold dipolar gases. The investigation addresses the transition region between few- and many-body physics as a function of temperature using a system of ten dipoles in five tubes.

Journal or Publication Title: Mathematics
Volume of the journal: 8
Issue Number: 4
Place of Publication: Darmstadt
Publisher: MDPI
Collation: 16 Seiten
Uncontrolled Keywords: cold dipolar molecules, Few-body to many-body crossover, harmonic approximation
Classification DDC: 500 Naturwissenschaften und Mathematik > 510 Mathematik
500 Naturwissenschaften und Mathematik > 530 Physik
Divisions: 05 Department of Physics > Institute of Nuclear Physics
Date Deposited: 09 Feb 2022 15:21
Last Modified: 07 Mar 2023 08:08
DOI: 10.26083/tuprints-00016150
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-161500
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/16150
PPN: 50556887X
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