Many-body techniques are computational and theoretical methods used to describe and solve quantum or classical systems with a large number of interacting particles, where correlations invalidate simple mean-field or single-particle approximations. They encompass approaches such as Green’s function methods, diagrammatic perturbation theory, coupled-cluster theory, configuration interaction, quantum Monte Carlo, density-matrix renormalization group, and dynamical mean-field theory. These techniques systematically incorporate many-body correlations into observables like excitation spectra, ground-state energies, and response functions, and are central in condensed matter physics, nuclear structure, quantum chemistry, and strongly correlated materials research.
Hollow atoms are special atoms with multiple missing electrons in their inner shells, while their outer shells are still fully or partially filled with electrons. Studying the production mechanisms, internal structure, and ...
General Physics
Jul 9, 2025
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From subatomic particles to complex molecules, quantum systems hold the key to understanding how the universe works. But there's a catch: when you try to model these systems, that complexity quickly spirals out of control—just ...
Quantum Physics
Oct 17, 2024
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By cleverly applying a computational technique, scientists have made a breakthrough in understanding the "pseudogap," a long-standing puzzle in quantum physics with close ties to superconductivity. The discovery, presented ...
Superconductivity
Sep 19, 2024
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231
The fusion of two nuclei is a complex process influenced by many factors. These factors include not only the relative energy and angular momentum of the two nuclei, but also how their structures evolve as they collide. The ...
General Physics
Jul 15, 2024
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Tensor force is a crucial ingredient of the nucleon-nucleon (NN) interaction, and has an important impact on the structural and dynamical properties of the nuclear many-body system. Many efforts have been devoted to studying ...
General Physics
Jul 9, 2024
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When atomic nuclei and subatomic particles interact, the results are incredibly complex. These are the "many body problems" of quantum mechanics. To help make sense of these interactions, scientists create ways to simplify ...
General Physics
Jul 8, 2024
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Since the first successful fabrication of a two-dimensional structure of carbon atoms about 20 years ago, graphene has fascinated scientists. A few years ago, researchers discovered that two layers of graphene, slightly twisted ...
Nanomaterials
Apr 27, 2022
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