Quantum criticality of generalized Aubry-Andr\'{e} models with exact mobility edges using fidelity susceptibility

التفاصيل البيبلوغرافية
العنوان: Quantum criticality of generalized Aubry-Andr\'{e} models with exact mobility edges using fidelity susceptibility
المؤلفون: Liu, Yu-Bin, Zhang, Wen-Yi, Yi, Tian-Cheng, Li, Liangsheng, Liu, Maoxin, You, Wen-Long
المصدر: Phys. Rev. E 109, 054123 (2024)
سنة النشر: 2024
المجموعة: Condensed Matter
Quantum Physics
مصطلحات موضوعية: Quantum Physics, Condensed Matter - Disordered Systems and Neural Networks
الوصف: In this study, we explore the quantum critical phenomena in generalized Aubry-Andr\'{e} models, with a particular focus on the scaling behavior at various filling states. Our approach involves using quantum fidelity susceptibility to precisely identify the mobility edges in these systems. Through a finite-size scaling analysis of the fidelity susceptibility, we are able to determine both the correlation-length critical exponent and the dynamical critical exponent at the critical point of the generalized Aubry-Andr\'{e} model. Based on the Diophantine equation conjecture, we can determines the number of subsequences of the Fibonacci sequence and the corresponding scaling functions for a specific filling fraction, as well as the universality class. Our findings demonstrate the effectiveness of employing the generalized fidelity susceptibility for the analysis of unconventional quantum criticality and the associated universal information of quasiperiodic systems in cutting-edge quantum simulation experiments.
Comment: 9 pages, 5 figures
نوع الوثيقة: Working Paper
DOI: 10.1103/PhysRevE.109.054123
URL الوصول: http://arxiv.org/abs/2405.13282
رقم الأكسشن: edsarx.2405.13282
قاعدة البيانات: arXiv
الوصف
DOI:10.1103/PhysRevE.109.054123