TY - JOUR
T1 - Escape of a vector matter-wave soliton from a parabolic trap
AU - Bludov, Yuliy V.
AU - García-Ñustes, Monica A.
N1 - Funding Information:
YVB acknowledges the support from Portuguese Foundation for Science and Technology (FCT) through Grant No. UID/FIS/04650/2013. MAG-N is grateful for the financial support of FONDECYT project 11130450.
Publisher Copyright:
© 2017 IOP Publishing Ltd.
PY - 2017/6/12
Y1 - 2017/6/12
N2 - We show that a vector matter-wave soliton in a Bose-Einstein condensate (BEC) loaded into an optical lattice can escape from a trap formed by a parabolic potential, resembling a Hawking emission. The particle-antiparticle pair is emulated by a low-amplitude bright-bright soliton in a two-component BEC with effective masses of opposite signs. It is shown that the parabolic potential leads to a spatial separation of BEC components. One component with chemical potential in a semi-infinite gap exerts periodical oscillations, while the other BEC component, with negative effective mass, escapes from the trap. The mechanism of atom transfer from one BEC component to another by spatially periodic linear coupling term is also discussed.
AB - We show that a vector matter-wave soliton in a Bose-Einstein condensate (BEC) loaded into an optical lattice can escape from a trap formed by a parabolic potential, resembling a Hawking emission. The particle-antiparticle pair is emulated by a low-amplitude bright-bright soliton in a two-component BEC with effective masses of opposite signs. It is shown that the parabolic potential leads to a spatial separation of BEC components. One component with chemical potential in a semi-infinite gap exerts periodical oscillations, while the other BEC component, with negative effective mass, escapes from the trap. The mechanism of atom transfer from one BEC component to another by spatially periodic linear coupling term is also discussed.
KW - Bose-Einstein condensate
KW - optical lattice
KW - soliton
UR - http://www.scopus.com/inward/record.url?scp=85020493479&partnerID=8YFLogxK
U2 - 10.1088/1361-6455/aa7432
DO - 10.1088/1361-6455/aa7432
M3 - Article
AN - SCOPUS:85020493479
VL - 50
JO - Journal of Physics B: Atomic, Molecular and Optical Physics
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
SN - 0953-4075
IS - 13
M1 - 135004
ER -