Spectral functions of strongly interacting isospin-1/2 bosons in one dimension

Details Spectral functions of strongly interacting isospin-1/2 bosons in one dimension Spectral functions of strongly interacting isospin-1/2 bosons in one dimension

2008-08-05

arxiv.org/abs/0808.0681v2

Phys. Rev. Lett. 101, 170403 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

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Scientific paper

10.1103/PhysRevLett.101.170403

We study a system of one-dimensional (iso)spin-1/2 bosons in the regime of strong repulsive interactions. We argue that the low-energy spectrum of the system consists of acoustic density waves and the spin excitations described by an effective ferromagnetic spin chain with a small exchange constant J. We use this description to compute the dynamic spin structure factor and the spectral functions of the system.

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