TY - JOUR

T1 - Modulational instability in binary spin-orbit-coupled Bose-Einstein condensates

AU - Bhat, Ishfaq Ahmad

AU - Mithun, T.

AU - Malomed, B. A.

AU - Porsezian, K.

N1 - Publisher Copyright:
© 2015 American Physical Society.

PY - 2015/12/2

Y1 - 2015/12/2

N2 - We study modulation instability (MI) of flat states in two-component spin-orbit-coupled (SOC) Bose-Einstein condensates (BECs) in the framework of coupled Gross-Pitaevskii equations for two components of the pseudospinor wave function. The analysis is performed for equal densities of the components. Effects of the interaction parameters, Rabi coupling, and SOC on the MI are investigated. In particular, the results demonstrate that the SOC strongly alters the commonly known MI (immiscibility) condition, g122>g1g2, for the binary superfluid with coefficients g1,2 and g12 of the intra- and interspecies repulsive interactions. In fact, the binary BEC is always subject to the MI under the action of the SOC, which implies that the ground state of the system is plausibly represented by a striped phase.

AB - We study modulation instability (MI) of flat states in two-component spin-orbit-coupled (SOC) Bose-Einstein condensates (BECs) in the framework of coupled Gross-Pitaevskii equations for two components of the pseudospinor wave function. The analysis is performed for equal densities of the components. Effects of the interaction parameters, Rabi coupling, and SOC on the MI are investigated. In particular, the results demonstrate that the SOC strongly alters the commonly known MI (immiscibility) condition, g122>g1g2, for the binary superfluid with coefficients g1,2 and g12 of the intra- and interspecies repulsive interactions. In fact, the binary BEC is always subject to the MI under the action of the SOC, which implies that the ground state of the system is plausibly represented by a striped phase.

UR - http://www.scopus.com/inward/record.url?scp=84950105411&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.92.063606

DO - 10.1103/PhysRevA.92.063606

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AN - SCOPUS:84950105411

SN - 1050-2947

VL - 92

JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

IS - 6

M1 - 063606

ER -