Effect of transverse confinement on a quasi-one dimensional dipolar Bose gas

Stefania de Palo (1, 2) , Edmond Orignac (3) , Roberta Citro (4) , Luca Salasnich (5, 6)

1 Dipartimento di Fisica Teorica
2 IOM - CNR Istituto Officina dei Materiali
3 Phys-ENS - Laboratoire de Physique de l'ENS Lyon
4 Dipartamento di Fisica "E. R. Caianiello"
5 Unipd - Università degli Studi di Padova = University of Padua
6 INO - Istituto Nazionale di Ottica

We study a gas of bosonic dipolar atoms in the presence of a transverse harmonic trapping potential by using an improved variational Bethe ansatz, which includes the transverse width of the atomic cloud as a variational parameter. Our calculations show that the system behavior evolves from quasi-one dimensional to a strictly one-dimensional one by changing the atom-atom interaction, or the axial density, or the frequency of the transverse confinement. Quite remarkably, in the droplet phase induced by the attractive dipolar interaction the system becomes sub-one dimensional when the transverse width is smaller than the characteristic length of the transverse harmonic confinement.

Mots clés: Variational Approximation; Dipolar interaction; Ultra Cold Atoms; Lieb-Liniger model

Domaines: Gaz Quantiques [cond-mat.quant-gas]; Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

Stefania de Palo, Edmond Orignac, Roberta Citro, Luca Salasnich. Effect of transverse confinement on a quasi-one dimensional dipolar Bose gas. Condensed Matter, 2023, Special Issue Fluctuations and Highly Non-linear Phenomena in Superfluids and Superconductors VII), 8 (1), pp.26. ⟨10.3390/condmat8010026⟩. ⟨hal-04015911⟩