Observation of many-body localization of interacting fermions in a quasirandom optical lattice
Michael Schreiber,Sean Hodgman,Pranjal Bordia,Henrik P. Lüschen,Mark H. Fischer,Ronen Vosk,Ehud Altman,Ulrich Schneider,Immanuel Bloch +8 more
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TLDR
This experiment experimentally observed this nonergodic evolution for interacting fermions in a one-dimensional quasirandom optical lattice and identified the MBL transition through the relaxation dynamics of an initially prepared charge density wave.Abstract:
Many-body localization (MBL), the disorder-induced localization of interacting particles, signals a breakdown of conventional thermodynamics because MBL systems do not thermalize and show nonergodic time evolution. We experimentally observed this nonergodic evolution for interacting fermions in a one-dimensional quasirandom optical lattice and identified the MBL transition through the relaxation dynamics of an initially prepared charge density wave. For sufficiently weak disorder, the time evolution appears ergodic and thermalizing, erasing all initial ordering, whereas above a critical disorder strength, a substantial portion of the initial ordering persists. The critical disorder value shows a distinctive dependence on the interaction strength, which is in agreement with numerical simulations. Our experiment paves the way to further detailed studies of MBL, such as in noncorrelated disorder or higher dimensions.read more
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Colloquium: Many-body localization, thermalization, and entanglement
TL;DR: Theoretically, many-body localized (MBL) systems exhibit a new kind of robust integrability: an extensive set of quasilocal integrals of motion emerges, which provides an intuitive explanation of the breakdown of thermalization as mentioned in this paper.
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Quantum simulations with ultracold atoms in optical lattices
TL;DR: In this article, the authors review recent experimental progress in quantum many-body simulation and comment on future directions, and present a review of the current state-of-the-art in this field.
Journal ArticleDOI
Quantum thermalization through entanglement in an isolated many-body system
Adam Kaufman,M. Eric Tai,Alexander Lukin,Matthew Rispoli,Robert Schittko,Philipp M. Preiss,Markus Greiner +6 more
TL;DR: Microscopy of an evolving quantum system indicates that the full quantum state remains pure, whereas thermalization occurs on a local scale, whereas entanglement creates local entropy that validates the use of statistical physics for local observables.
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Exploring the many-body localization transition in two dimensions
Jae-yoon Choi,Sebastian Hild,Johannes Zeiher,Peter Schauß,Antonio Rubio-Abadal,Tarik Yefsah,Vedika Khemani,David A. Huse,David A. Huse,Immanuel Bloch,Immanuel Bloch,Christian Gross +11 more
TL;DR: The observation of a many-body localization transition between thermal and localized phases for bosons in a two-dimensional disordered optical lattice is reported, highlighting the power of quantum simulation to solve problems that are currently inaccessible to classical computing techniques.
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Many-body localization in a quantum simulator with programmable random disorder
Jacob Smith,A. Lee,Philip Richerme,Brian Neyenhuis,Paul Hess,Philipp Hauke,Philipp Hauke,Markus Heyl,Markus Heyl,Markus Heyl,David A. Huse,Christopher Monroe +11 more
TL;DR: In this paper, an Ising Hamiltonian with long-range interactions and programmable random disorder is used to generate many-body localization (MBL) states in a small system with programmable disorder.
References
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