Interaction of dark solitons with localized impurities in Bose-Einstein condensates

Journal Article · Fri Nov 01 00:00:00 EST 2002 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.66.053608· OSTI ID:20632338

Frantzeskakis, Dimitri J; Theocharis, G; Diakonos, F K ^[1]; Schmelcher, Peter ^[2]; Kivshar, Yuri S ^[3]

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1. Department of Physics, University of Athens, Panepistimiopolis, Zografos, Athens 15784 (Greece)
2. Theoretische Chemie, Physikalisch-Chemisches Institut, INF 229, 69120 Heidelberg (Germany)
3. Nonlinear Physics Group, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200 (Australia)

We study the interaction of dark solitons with a localized impurity in Bose-Einstein condensates. We apply the soliton perturbation theory developed earlier in optics for describing the soliton dynamics and soliton-impurity interaction analytically, and then verify the results by direct numerical simulations of the Gross-Pitaevskii equation. We find that a dark soliton can be reflected from or transmitted through a repulsive impurity in a controllable manner, while near the critical point the soliton can be quasitrapped by the impurity. Additionally, we demonstrate that an immobile soliton may be captured and dragged by an adiabatically moving attractive impurity.

• OSTI ID: 20632338
• Journal Information: Physical Review. A, Vol. 66, Issue 5; Other Information: DOI: 10.1103/PhysRevA.66.053608; (c) 2002 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BASIC INTERACTIONS
BOSE-EINSTEIN CONDENSATION
COMPUTERIZED SIMULATION
OPTICS
PERTURBATION THEORY
QUANTUM MECHANICS
SOLITONS
WAVE EQUATIONS