Strongly correlated systems are physical systems in which electron–electron (or more generally particle–particle) interactions are comparable to or larger than their kinetic energy, invalidating independent-particle or mean-field descriptions. In such systems, many-body effects dominate, leading to emergent phenomena such as Mott insulating behavior, unconventional superconductivity, non-Fermi-liquid states, heavy-fermion behavior, and complex magnetic orders. Their theoretical treatment typically requires beyond-perturbative methods, including dynamical mean-field theory, quantum Monte Carlo, tensor-network approaches, and exact diagonalization. Strong correlations are central in materials such as transition-metal oxides, cuprates, organics, and ultra-cold atomic gases engineered to simulate lattice models like the Hubbard or t–J models.
Electrons can be elusive, but Cornell researchers using a new computational method can now account for where they go—or don't go—in certain layered materials.
Condensed Matter
Dec 8, 2025
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90
A research group led by Prof. Li Xiangyang from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences, has made a new discovery: a single organic molecule can induce the Kondo effect in a magnetic atom, ...
General Physics
Nov 7, 2025
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101
Bose-Einstein condensates (BECs) are fascinating states of matter that emerge when atoms or molecules are cooled to extremely low temperatures just slightly above absolute zero (0 K). In 2023, physicists at Columbia University ...
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, ...
2H-NbO₂—a novel van der Waals oxide synthesized by researchers from Japan—exhibits strongly correlated electronic properties with two-dimensional flexibility. By chemically extracting lithium ions from the layered sheets ...
Nanophysics
Sep 8, 2025
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92
Metal oxides are abundant in nature and central to technologies such as photocatalysis and photovoltaics. Yet, many suffer from poor electrical conduction, caused by strong repulsion between electrons in neighboring metal ...
Condensed Matter
Sep 8, 2025
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46
Matter gets weird at the quantum scale, and among the oddities is the Efimov effect, a state in which the attractive forces between three or more atoms bind them together, even as they are excited to higher energy levels, ...
Quantum Physics
Sep 2, 2025
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168
A joint research team from Japan has observed "heavy fermions," electrons with dramatically enhanced mass, exhibiting quantum entanglement governed by the Planckian time—the fundamental unit of time in quantum mechanics. ...
Condensed Matter
Aug 5, 2025
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Quantum materials exhibit remarkable emergent properties when they are excited by external sources. Functional applications of these properties rely heavily on their tunability in real time. However, these excited states ...
Optics & Photonics
Jun 5, 2025
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78
When exposed to periodic driving, which is the time-dependent manipulation of a system's parameters, quantum systems can exhibit interesting new phases of matter that are not present in time-independent (i.e., static) conditions. ...
