Spectroscopic Features of Quantum Many-Body Scar States  

作　　者：Wenjie Wei Long Zhang 

机构地区：[1]Kavli Institute for Theoretical Sciences and CAS Center for Excellence in Topological Quantum Computation,University of Chinese Academy of Sciences,Beijing 100190,China [2]Hefei National Laboratory,Hefei 230088,China

出　　处：《Chinese Physics Letters》2025年第2期26-30,共5页中国物理快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant No.12174387);the Chinese Academy of Sciences(Grant Nos.YSBR-057 and JZHKYPT-2021-08);the Innovative Program for Quantum Science and Technology(Grant No.2021ZD0302600)。

摘　　要：We studied the dynamic correlations of non-integrable systems with quantum many-body scar(QMBS)states generated by a ladder operator.The ladder operator's spectral function has an exact δ-function peak induced by the QMBS states.As a concrete example,we show that in the one-dimensional(1D)spin-1 Affleck-Kennedy-Lieb-Tasaki model,the spectral function of two-magnon excitations exhibits a characteristic bowtie shape composed of aδ-function resonance peak at momentum k=π and a continuum spectrum elsewhere.The two-magnon excitations can be observed via resonant inelastic X-ray scattering spectroscopy on quasi-1D nickelates and other spin-1 antiferromagnetic materials.Therefore,the findings of this study pave the way for detecting(approximate)QMBS states in realistic materials.

关 键 词：materials EXCITATION LADDER 

分 类 号：O413.3[理学—理论物理]