COLLOQUIUM: Many-body localization: When thermalization fails and how to observe it experimentally
Автор: Centre for Quantum Technologies
Загружено: 2019-11-24
Просмотров: 1033
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Speaker: Rubem Mondaini, Beijing Computational Sciences Research Center
Abstract:
The observation of many-body localization is a paradigmatic example of the amount of time an idea takes to get mature enough, and the numerical and experimental methods to develop sufficiently, in order to settle its existence. After the original study of Philip Anderson in 1958, demonstrating localization of non-interacting quantum particles in disordered settings, a natural question is on the resulting effects of the inter-particle interactions on this phenomenon. Only after 50 years, substantial theoretical progress was made in solving this puzzle and, in 2016 the first experimental observation was realized. The advent of platforms involving ultracold atoms allowed the inspection of an inherently dynamical quantum phase transition, that goes beyond the standard ground-state classification of the quantum matter, and its associated low-lying excitations. In this talk, after introducing the general conditions where it occurs, and review the experiments tackling it so far, I will show numerical and experimental results using quantum circuits of superconducting qubits that shed light on yet another highly debated aspect: the possible existence of many-body mobility edges.
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