Dynamics of aperiodic quantum spin chains

• Grant number: 17/07248-9
• Support Opportunities: Regular Research Grants
• Start date: September 01, 2017
• End date: February 29, 2020
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Andre de Pinho Vieira
• Grantee: Andre de Pinho Vieira
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

We aim at studying the dynamical properties of quantum spin chains with deterministic aperiodic couplings. We will employ real-space renormalization-group techniques as well as exact-diagonalization computational methods to investigate systems such as the spin-\frac{1}{2}XXZ chain and the quantum Ising chain, focusing on analyzing the dynamical response to a quantum quench, in order to better understand the changes induced in the ground-state structure and the dynamics of elementary excitations by the combination of quantum fluctuations and translation-symmetry breaking. We will be especially interested in the effects of such combination on the so-called dynamical phase transitions, as well as on many-body localization phenomena. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FABRELLI, H.; VIEIRA, A. P.; PADUAN-FILHO, A.; FREITAS, R. S.. Experimental and theoretical delimitation of the quasi-1D Tomonaga-Luttinger-liquid regime in a spin-1 field-induced antiferromagnet. Journal of Alloys and Compounds, v. 853, FEB 5 2021. (17/07248-9, 15/16191-5)

VARIZI, ADALBERTO D.; VIEIRA, ANDRE P.; CORMICK, CECILIA; DRUMOND, RAPHAEL C.; LANDI, GABRIEL T.. Quantum coherence and criticality in irreversible work. PHYSICAL REVIEW RESEARCH, v. 2, n. 3, AUG 20 2020. (17/07248-9, 17/50304-7, 17/07973-5, 18/12813-0)