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.
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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The simulation of strongly interacting many-body systems is a key objective of quantum physics research, as it can help to test the predictions of physics theories and yield new valuable insight. Researchers at Quantinuum, ...
Quantum physics often reveals phenomena that defy common sense. A new theory of quantum scarring deepens our understanding of the connection between the quantum world and classical mechanics, sheds light on earlier findings ...
Condensed Matter
Sep 19, 2025
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Patterns in chaos have been proven, in the incredibly tiny quantum realm, by an international team co-led by UC Santa Cruz physicist Jairo Velasco, Jr. In a new paper published on November 27 in Nature, the researchers detail ...
Quantum Physics
Dec 2, 2024
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Researchers at Ludwig-Maximilians-Universität, Max-Planck-Institut für Quantenoptik, Munich Center for Quantum Science and Technology (MCQST) and the University of Massachusetts recently carried out a study investigating ...
Although systems consisting of many interacting small particles can be highly complex and chaotic, some can nonetheless be described using simple theories. Does this also pertain to the world of quantum physics?
Quantum Physics
Sep 9, 2024
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