Related papers: Spin dynamics and dark particle in a weak-coupled quantum Ising ladder with $\mathcal{D}

Spin dynamics and dark particle in a weak-coupled quantum Ising ladder with $\mathcal{D}_8^{(1)}$ spectrum

URL: http://arxiv.org/abs/2402.11229v1
Date: Sat, 17 Feb 2024 09:12:59 GMT
Title: Spin dynamics and dark particle in a weak-coupled quantum Ising ladder with $\mathcal{D}_8^{(1)}$ spectrum
Authors: Yunjing Gao, Xiao Wang, Ning Xi, Yunfeng Jiang, Rong Yu, and Jianda Wu
Abstract summary: Emergent Ising$_h2$ integrability is anticipated in a quantum Ising ladder composed of two weakly coupled, critical transverse field Ising chains. We show that the selection rule to the form factor, which is inherent in the intrinsic charge-parity $mathcalC$ of the Ising$_h2$ particles, causes a significant result. The long lifetime of dark particle suggests its potential as a stable qubit for advancing quantum information technology.
Score: 7.16653440475268
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Emergent Ising$_h^2$ integrability is anticipated in a quantum Ising ladder composed of two weakly coupled, critical transverse field Ising chains. This integrable system is remarkable for including eight types of massive relativistic particles, with their scattering matrix and spectrum characterized by the $\mathcal{D}_8^{(1)}$ Lie algebra. In this article we delve into the zero-temperature spin dynamics of this integrable quantum Ising ladder. By computing the dynamical structure factors from analytical form factor approach, we clearly identify dispersive single-particle excitations of (anti-) soliton and breathers as well as their multi-particle continua in the spin dynamical spectrum. We show that the selection rule to the form factor, which is inherent in the intrinsic charge-parity $\mathcal{C}$ of the Ising$_h^2$ particles as well as the local spin operators, causes a significant result that $\mathcal{C}$-odd particles, termed as dark particles, cannot be directly excited from the ground state through any local or quasi-local operations. Furthermore, the lightest dark particle is proposed to be generated and controlled through resonant absorption-resonant emission processes. The long lifetime of dark particle suggests its potential as a stable qubit for advancing quantum information technology.

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