Effect of Rashba spin-orbit and Rabi couplings on the excitation spectrum of binary Bose-Einstein condensates

@article{Ravisankar2021EffectOR,
  title={Effect of Rashba spin-orbit and Rabi couplings on the excitation spectrum of binary Bose-Einstein condensates},
  author={R. Ravisankar and H. Fabrelli and Arnaldo Gammal and Paulsamy Muruganandam and Pankaj Kumar Mishra},
  journal={Physical Review A},
  year={2021}
}
We present the collective excitation spectrum analysis of binary Bose-Einstein condensates (BECs) with spin-orbit (SO) and Rabi couplings in a quasi-two-dimensional system. In particular, we investigate the role of SO and Rabi coupling strengths in determining the dynamical stability of the coupled BECs using Bogoliubov-de Gennes (BdG) theory. Using the eigenergy of BdG spectrum, we confirm the existence of phonon, roton, and maxon modes with weak repulsive intraand interspecies contact… 

References

SHOWING 1-10 OF 77 REFERENCES

Spotlighting phase separation in Rashba spin-orbit coupled Bose–Einstein condensates in two dimensions

We study the system of spin-orbit (SO) coupled Bose–Einstein condensates (BEC) with Rabi coupling in quasi-two dimensions characterized by unequal Rashba and Dresselhaus couplings. The ground state

Properties of Bose gases with the Raman-induced spin–orbit coupling

In this paper we investigate the properties of Bose gases with Raman-induced spin–orbit (SO) coupling. It is found that the SO coupling can greatly modify the single-particle density of state, and

Zero-momentum coupling induced transitions of ground states in Rashba spin–orbit coupled Bose–Einstein condensates

We investigate the transitions of ground states induced by zero momentum (ZM) coupling in pseudospin-1/2 Rashba spin–orbit coupled Bose–Einstein condensates confined in a harmonic trap. In a weak

Exotic superfluidity in spin-orbit coupled Bose-Einstein condensates

We study the superfluidity of a spin-orbit coupled Bose-Einstein condensate (BEC) by computing its Bogoliubov excitations, which are found to have two branches: one is gapless and phonon-like at long

Quenching dynamics of the bright solitons and other localized states in spin–orbit coupled Bose–Einstein condensates

We study the dynamics of binary Bose–Einstein condensates made of ultracold and dilute alkali-metal atoms in a quasi-one-dimensional setting. Numerically solving the two coupled Gross–Pitaevskii

Spin-orbit-coupling–induced anharmonic collective modes in a Bose-Einstein condensate

The collective excitations of a spin-orbit–coupled Bose-Einstein condensate are investigated by using a variational method and numerical simulation. The collective modes are depicted in zero-momentum

Matter-wave dark solitons and their excitation spectra in spin-orbit coupled Bose-Einstein condensates

We present three types of dark solitons in quasi–one-dimensional spin-orbit coupled repulsive Bose-Einstein condensates. Among these families, two are always stable, while the third one is only

Bifurcations, stability and mode evolution in segregated quasi-2D condensate mixtures

We present new features of low energy Bogoliubov quasiparticle excitations of a two-component Bose–Einstein condensate (TBEC) in quasi-2D geometry at zero temperature using Hartree–Fock–Bogoliubov

Collective excitation of two-dimensional Bose–Einstein condensate in liquid phase with spin–orbit coupling

We have studied the collective excitation of Bose–Einstein condensate of short-range weak interacting atoms with spin–orbit coupling (SOC) in two dimensions in the liquid phase. In our study, we have
...