title: Many-body matter-wave dark soliton.
abstract: The Gross-Pitaevskii equation--which describes interacting bosons in the mean-field approximation--possesses solitonic solutions in dimension one. For repulsively interacting particles, the stationary soliton is dark, i.e., is represented by a local density minimum. Many-body effects may lead to filling of the dark soliton. Using quasiexact many-body simulations, we show that, in single realizations, the soliton appears totally dark although the single particle density tends to be uniform.
authors.affiliation: Laboratoire Kastler Brossel, UPMC-Paris6, ENS, CNRS; 4 Place Jussieu, F-75005 Paris, France.
authors.forename: Dominique
authors.initials: D
authors.lastname: Delande
authors.affiliation: Instytut Fizyki imienia Mariana Smoluchowskiego, Uniwersytet Jagielloński, Ulica Reymonta 4, PL-30-059 Kraków, Poland and Mark Kac Complex Systems Research Center, Uniwersytet Jagielloński, Ulica Reymonta 4, PL-30-059 Kraków, Poland.
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Sacha