Roton in a few-body dipolar system

R. Ołdziejewski, W. Górecki, K. Pawłowski, K. Rzazewski

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We solve numerically exactly the many-body 1D model of bosons interacting via short-range and dipolar forces and moving in the box with periodic boundary conditions. We show that the lowest energy states with fixed total momentum can be smoothly transformed from the typical states of collective character to states resembling single particle excitations. In particular, we identify the celebrated roton state. The smooth transition is realized by simultaneous tuning short-range interactions and adjusting a trap geometry. With our methods we study the weakly interacting regime as well as the regime beyond the range of validity of the Bogoliubov approximation.

Original languageEnglish (US)
Article number123006
JournalNew Journal of Physics
Volume20
Issue number12
DOIs
StatePublished - Dec 5 2018
Externally publishedYes

Keywords

  • 1D systems
  • dipolar interactions
  • roton
  • ultracold gases

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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