2018/07/16 by Sayan Choudhury, Choudhury, Sayan, Eun-Ah Kim +3
Chemistry · Medicine · Physics and Astronomy · #Advanced NMR Techniques and Applications #Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Medical Imaging Techniques and Applications #Nuclear Physics and Applications #Quantum Gases (cond-mat.quant-gas)
paper · pdf · doi:10.48550/arxiv.1807.05969
openalex publication_date 2018/07/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Motivated by the question of whether disorder is a prerequisite for localization to occur in quantum many-body systems, we study a frustrated one-dimensional spin chain, which supports localized many-body eigenstates in the absence of disorder. When the system is prepared in an initial state with one domain wall, it exhibits characteristic signatures of quasi-many-body localization (quasi- MBL), including initial state memory retention, an exponentially increasing lifetime with enlarging the size of the system, a logarithmic growth of entanglement entropy, and a logarithmic light cone of an out-of-time-ordered correlator. We further show that the localized many-body eigenstates can be manipulated as pseudospin-1/2s and thus could potentially serve as qubits. Our findings suggest a new route of using frustration to access quasi-MBL and preserve quantum coherence.