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Dynamics of aperiodic quantum spin chains

Grant number: 17/07248-9
Support Opportunities:Regular Research Grants
Duration: September 01, 2017 - 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


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)

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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, . (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, . (17/07248-9, 17/50304-7, 17/07973-5, 18/12813-0)

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