Investigation of the spin dynamics of quantum spin dimers with Dzyaloshinsky-Moriya interaction

TL;DR

This paper explores how applying a magnetic field to a quantum spin dimer with Dzyaloshinsky-Moriya interaction can manipulate its quantum and magnetic states, with potential extensions to larger spin chains.

Contribution

It introduces a method to control quantum spin states via adiabatic magnetic field changes, extending the concept beyond simple dimers to larger spin systems.

Findings

Ground state can be transformed into a classical spiral state.

Oscillations between spiral states can be controlled and halted.

Method applicable to quantum spin chains with even number of spins.

Abstract

We investigate the ground state configuration and spin dynamics of a quantum spin spiral dimer when a magnetic field is applied to one of its constituent spins. By adiabatic changing the magnetic field, it is possible to change the non-magnetic ground state to a classical spiral state, which oscillates periodically to its inverted classical spiral state configuration. This oscillation can be halted at any time, leading to the possibility of manipulating the quantum state and the magnetic configuration of the spin dimer. Notably, this idea is not limited to spin dimers and can also be extended to quantum spin chains with an even number of spins.