Many-body dark solitons in one-dimensional hard-core Bose gases

被引：2
|
作者：
Tettamanti, Manuele [1 ,2 ]
Parola, Alberto [3 ]
机构：
[1] Univ Milano Bicocca, Dipartimento Fis Giuseppe Occhialini, Piazza Sci 3, I-20126 Milan, Italy
[2] Ist Nazl Fis Nucl, Sez Milano Bicocca, Piazza Sci 3, I-20126 Milan, Italy
[3] Univ Insubria, Dipartimento Sci & Alta Tecnol, Via Valleggio 11, I-22100 Como, Italy
来源：
PHYSICAL REVIEW A | 2021年 / 104卷 / 04期
关键词：
IMPENETRABLE BOSONS;
D O I：
10.1103/PhysRevA.104.043325
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The existence and stability of solitonic states in one-dimensional repulsive Bose-Einstein condensates is investigated within a fully many-body framework by considering the limit of infinite repulsion (Tonks-Girardeau gas). A class of stationary, shape-invariant states propagating at constant velocity are explicitly found and compared to the known solution of the Gross-Pitaevskii equation. The typical features attributed to nonlinearity are thus recovered in a purely linear theory, provided the full many-particle physics is correctly accounted for. However, the formation dynamics predicted by the Gross-Pitaevskii approximation considerably differs from the exact many-body evolution.
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页数：6
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