TY - JOUR

T1 - Self-localization of magnons and a magnetoroton in a binary Bose-Einstein condensate

AU - Andreev, S.

AU - Utesov, O.

N1 - Funding Information: S.V.A. acknowledges the support by Russian Science Foundation (Grant No. 18-72-00013). Contribution to the study by O.I.U. was funded by RFBR according to the research Project No. 18-02-00706. Publisher Copyright: © 2020 American Physical Society.

PY - 2020/1/21

Y1 - 2020/1/21

N2 - We consider a two-component Bose-condensed mixture characterized by positive s-wave scattering lengths. We assume equal densities and intraspecies interactions. By doing the Bogoliubov transformation of an effective Hamiltonian, we obtain the lower energy magnon dispersion incorporating the superfluid entrainment between the components. We argue that p-wave pairing of distinct bosons should be accompanied by self-localization of magnons and formation of a magnetoroton. We demonstrate the effect on a model system of particles interacting via step potentials.

AB - We consider a two-component Bose-condensed mixture characterized by positive s-wave scattering lengths. We assume equal densities and intraspecies interactions. By doing the Bogoliubov transformation of an effective Hamiltonian, we obtain the lower energy magnon dispersion incorporating the superfluid entrainment between the components. We argue that p-wave pairing of distinct bosons should be accompanied by self-localization of magnons and formation of a magnetoroton. We demonstrate the effect on a model system of particles interacting via step potentials.

KW - ELEMENTARY EXCITATIONS

KW - MIXTURES

KW - ROTON

UR - http://www.scopus.com/inward/record.url?scp=85078754104&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.101.013621

DO - 10.1103/PhysRevA.101.013621

M3 - статья

VL - 101

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

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

SN - 1050-2947

IS - 1

M1 - 013621

ER -