Controlling soliton excitations in Heisenberg spin chain through magic angle

Abstract

We study the nonlinear dynamics of collective excitation in a $N$-site $XXZ$ quantum spin chain, which is manipulated by an oblique magnetic field. We show that, when the tilted field is applied along the magic angle ${\theta }_0=\pm \arccos \sqrt{1/3}$, the anisotropic Heisenberg spin chain becomes isotropic and thus an free propagating spin wave is stimulated. And in the regime of the tilted angle larger and smaller then the magic angle, two types of nonlinear excitations appear, which are bright soliton and dark soliton.

7 pages 4 figures

References in corpus (6)

• Quantum Communication Through an Unmodulated Spin Chain
• Perfect state transfer in quantum spin networks
• Quantum state transfer via the ferromagnetic chain in a spatially modulated field
• Quantum state transmission via a spin ladder as a robust data bus
• Low-frequency dynamics of disordered XY spin chains and pinned density waves: from localized spin waves to soliton tunneling
• Wave packet transmission of Bloch electron manipulated by magnetic field

Cited by in corpus (3)

• Time evolution of the one-dimensional Jaynes-Cummings-Hubbard Hamiltonian
• Band Structure, Phase transitions and Semiconductor Analogs in One-Dimensional Solid Light Systems
• Magic angle for barrier-controlled double quantum dots