TY - JOUR

T1 - Engineering bright solitons to enhance the stability of two-component Bose-Einstein condensates

AU - Radha, R.

AU - Vinayagam, P. S.

AU - Sudharsan, J. B.

AU - Liu, Wu Ming

AU - Malomed, Boris A.

N1 - Publisher Copyright:
© 2015 Elsevier B.V.

PY - 2015/12/4

Y1 - 2015/12/4

N2 - We consider a system of coupled Gross-Pitaevskii (GP) equations describing a binary quasi-one-dimensional Bose-Einstein condensate (BEC) with intrinsic time-dependent attractive interactions, placed in a time-dependent expulsive parabolic potential, in a special case when the system is integrable (a deformed Manakov's system). Since the nonlinearity in the integrable system which represents binary attractive interactions exponentially decays with time, solitons are also subject to decay. Nevertheless, it is shown that the robustness of bright solitons can be enhanced in this system, making their respective lifetime longer, by matching the time dependence of the interaction strength (adjusted with the help of the Feshbach-resonance management) to the time modulation of the strength of the parabolic potential. The analytical results, and their stability, are corroborated by numerical simulations. In particular, we demonstrate that the addition of random noise does not impact the stability of the solitons.

AB - We consider a system of coupled Gross-Pitaevskii (GP) equations describing a binary quasi-one-dimensional Bose-Einstein condensate (BEC) with intrinsic time-dependent attractive interactions, placed in a time-dependent expulsive parabolic potential, in a special case when the system is integrable (a deformed Manakov's system). Since the nonlinearity in the integrable system which represents binary attractive interactions exponentially decays with time, solitons are also subject to decay. Nevertheless, it is shown that the robustness of bright solitons can be enhanced in this system, making their respective lifetime longer, by matching the time dependence of the interaction strength (adjusted with the help of the Feshbach-resonance management) to the time modulation of the strength of the parabolic potential. The analytical results, and their stability, are corroborated by numerical simulations. In particular, we demonstrate that the addition of random noise does not impact the stability of the solitons.

KW - Bose-Einstein condensate

KW - Bright soliton

KW - GP equation

KW - Gauge transformation

UR - http://www.scopus.com/inward/record.url?scp=84945490244&partnerID=8YFLogxK

U2 - 10.1016/j.physleta.2015.08.033

DO - 10.1016/j.physleta.2015.08.033

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AN - SCOPUS:84945490244

SN - 0375-9601

VL - 379

SP - 2977

EP - 2983

JO - Physics Letters, Section A: General, Atomic and Solid State Physics

JF - Physics Letters, Section A: General, Atomic and Solid State Physics

IS - 45-46

ER -