1. Collective excitation of two-dimensional Bose–Einstein condensate in liquid phase with spin–orbit coupling
- Author
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Saswata Sahu and Dwipesh Majumder
- Subjects
Condensed Matter::Quantum Gases ,Physics ,Statistical Mechanics (cond-mat.stat-mech) ,Condensed Matter::Other ,FOS: Physical sciences ,Liquid phase ,Spin–orbit interaction ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,law.invention ,Quantum Gases (cond-mat.quant-gas) ,law ,Quantum mechanics ,Quasiparticle ,Condensed Matter - Quantum Gases ,Condensed Matter - Statistical Mechanics ,Bose–Einstein condensate ,Excitation - Abstract
We have studied the collective excitation of Bose-Einstein condensate of short range weak interacting atoms with spin-orbit coupling (SOC) in two dimension in liquid phase. In our study, we have included Rashba, Dresselhaus SOC as well as Raman SOC. The study of Bogoliubov excitation shows that in small interaction case only phonon modes are present and for higher interactions roton modes start to appear. Energy spectra contain two roton modes in the system relatively strong interacting atomic system.
- Published
- 2020