Quantum chaotic systems are physical systems whose classical counterparts exhibit deterministic chaos, while their quantum behavior reflects this through characteristic spectral and eigenstate properties rather than literal trajectory chaos. They are typically defined by Hamiltonians lacking sufficient integrals of motion for integrability and are studied via tools such as random matrix theory, semiclassical analysis, and eigenstate statistics. Hallmarks include Wigner–Dyson level spacing distributions, eigenstate delocalization in appropriate bases, sensitivity of spectral correlations to classical phase-space structures, and signatures linked to the semiclassical limit, exemplified by the Gutzwiller trace formula and correspondence between classical periodic orbits and quantum spectral fluctuations.
Even the most chaotic quantum systems keep a permanent mark of their own past—a "quantum birthmark"—that never fades. Researchers from Tampere University, Harvard University and TU Dresden discovered the feature in their ...
General Physics
Oct 5, 2026
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Many complex quantum systems rapidly lose the recognizable patterns of their initial states as their components interact. To describe patterns of regular and chaotic motion in specific systems, physicists can construct a ...
A team led by University at Buffalo physicists has found a mathematical solution that shows how a frustrated quantum magnet can transition from ultraslow behavior to ultrafast, highly entangled behavior resembling that of ...
Condensed Matter
Sep 22, 2026
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As materials become thinner—now reaching the thickness of single atoms—it has become increasingly difficult to create sufficiently large sheets and transfer them without cracking them into tiny flakes. Recent work by a broad ...
Nanophysics
Jul 29, 2026
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Physicists have discovered a surprisingly simple way to reproduce one of the most fascinating models in modern physics—linked to black holes, quantum chaos and exotic electronic materials—using ultracold atoms trapped in ...
Quantum Physics
Jul 23, 2026
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Preserving quantum information is key to developing useful quantum computing systems. But interacting quantum systems are chaotic and follow laws of thermodynamics, eventually leading to information loss. Physicists have ...
Quantum Physics
Feb 27, 2026
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Reservoir computing is a promising machine learning-based approach for the analysis of data that changes over time, such as weather patterns, recorded speech or stock market trends. Classical reservoir computing techniques ...
For the first time, researchers in China have accurately quantified how chaos increases in a quantum many-body system as it evolves over time. Combining experiments and theory, a team led by Yu-Chen Li at the University of ...
Quantum chaos describes chaotic classical dynamical systems in terms of quantum theory, but simulations of these systems are limited by computational resources. However, one team seems to have found a way by leveraging error ...
Additive manufacturing, more commonly known as 3D printing, will be an absolutely critical technology for any long-term settlement on another world. Its ability to take a generic input, such as plastic strips or metal powder, ...
Space Exploration
Jan 19, 2026
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