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Emergent Phenomena in Quantum Many-Body Systems

A special issue of Entropy (ISSN 1099-4300). This special issue belongs to the section "Quantum Information".

Deadline for manuscript submissions: 15 November 2025 | Viewed by 773

Special Issue Editors


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Guest Editor
Department of Physics, National University of Singapore, Singapore, Singapore
Interests: quantum many-body systems; quantum simulation; cold-atom systems; quantum computing

E-Mail Website
Guest Editor
Department of Physics, National University of Singapore, Singapore, Singapore
Interests: quantum simulation; non-equilibrium physics; topology; quantum information

Special Issue Information

Dear Colleagues,

Quantum many-body systems host an array of emergent phenomena arising from the complex interactions among particles. Unlike single-particle systems, the collective behavior of many-body systems can give rise to new phases of matter. Emergent features such as topological order, quantum criticality, fractionalization, many-body localization, and quantum many-body scars lie at the core of modern condensed-matter physics and quantum information science.

Recent advances in quantum simulation platforms, including ultracold atoms, trapped ions, and superconducting qubits, have enabled researchers to experimentally explore these phenomena with remarkable precision. In addition, powerful theoretical frameworks such as tensor network techniques and machine learning algorithms have also deepened our understanding of strongly correlated and non-equilibrium quantum systems.

This Special Issue aims to bring together original research and review articles that explore emergent behavior in quantum many-body systems from both theoretical and experimental perspectives. We encourage submissions that address the following:

  • Novel quantum phases of matter in symmetry-protected and topological phases.
  • Dynamics and thermalization in isolated and open quantum systems, including many-body localization and quantum many-body scars.
  • Experimental developments using cold atoms, superconducting qubits, or trapped ions.
  • Applications of tensor networks and machine learning in simulating many-body systems.

Dr. Ruizhe Shen
Dr. Ching Hua Lee
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Entropy is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • quantum phase transitions
  • quantum criticality
  • quantum simulation
  • tensor networks
  • strongly correlated systems
  • topological order
  • non-equilibrium dynamics
  • cold-atom systems

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Published Papers (1 paper)

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Research

16 pages, 1206 KB  
Article
Contrast Analysis on Spin Transport of Multi-Periodic Exotic States in the XXZ Chain
by Shixian Jiang, Jianpeng Liu and Yongqiang Li
Entropy 2025, 27(10), 1070; https://doi.org/10.3390/e27101070 - 15 Oct 2025
Viewed by 390
Abstract
Quantum spin transport in integrable systems reveals a rich nonequilibrium phenomena that challenges the conventional hydrodynamic framework. Recent advances in ultracold atom experiments with state preparation and single-site addressing have enabled the understanding of this anomalous behavior. Particularly, the full universality characterization of [...] Read more.
Quantum spin transport in integrable systems reveals a rich nonequilibrium phenomena that challenges the conventional hydrodynamic framework. Recent advances in ultracold atom experiments with state preparation and single-site addressing have enabled the understanding of this anomalous behavior. Particularly, the full universality characterization of exotic initial states, as well as their measurement representation, remain unknown. By employing tensor network and contrast methods, we systematically investigate spin transport in the quantum XXZ spin chain and extract dynamical scaling exponents emerging from two paradigmatic and experimentally attainable initial states, i.e., multi-periodic domain-wall (MPDW) and spin-helix (SH) states. Our results using different values of anisotropic parameters Δ[0,1.2] demonstrate the evident impeded transport and the difference between the two states with increasing Δ values. Large-scale and consistent simulations confirm the contrast method as a viable scaling extraction approach for exotic states with periodicity within experimentally accessible timescales. Our work establishes a foundation for studying initial memory and the corresponding relations of emergent transport behavior in nonequilibrium quantum systems, opening avenues for the identification of their unique universality classes. Full article
(This article belongs to the Special Issue Emergent Phenomena in Quantum Many-Body Systems)
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