RIGOROUS PROOF OF PSEUDOSPIN FERROMAGNETISM IN TWO-COMPONENT BOSONIC SYSTEMS WITH COMPONENT-INDEPENDENT INTERACTIONS-Reference-Cited by-同舟云学术

RIGOROUS PROOF OF PSEUDOSPIN FERROMAGNETISM IN TWO-COMPONENT BOSONIC SYSTEMS WITH COMPONENT-INDEPENDENT INTERACTIONS

Published:2003-03-20 Issue:07 Volume:17 Page:1027-1033
ISSN:0217-9792
Container-title:International Journal of Modern Physics B
language:en
Short-container-title:Int. J. Mod. Phys. B

Author:

YANG KUN¹²,LI YOU-QUAN²

Affiliation:

1. National High Magnetic Field Laboratory and Department of Physics, Florida State University, Tallahassee, Florida 32306, USA

2. Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou 310027, P. R. China

Abstract

For a two-component bosonic system, the components can be mapped onto a pseudo-spin degree of freedom with spin quantum number S = 1/2. We provide a rigorous proof that for a wide-range of real Hamiltonians with component independent mass and interaction, the ground state is a ferromagnetic state with pseudospin fully polarized. The spin-wave excitations are studied and found to have quadratic dispersion relations at long wavelength.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0217979203018041

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