Quantum many-body systems are physical systems composed of a large number of interacting quantum particles (such as electrons, atoms, or spins) whose collective behavior cannot be reduced to a simple sum of single-particle properties. They are described by many-body Hamiltonians on high-dimensional Hilbert spaces, where quantum statistics, entanglement, and correlations play central roles. Such systems exhibit emergent phenomena including quantum phase transitions, superconductivity, magnetism, and topological order, and are studied using methods like second quantization, Green’s functions, tensor networks, and quantum Monte Carlo to understand their equilibrium and nonequilibrium properties across different interaction and dimensionality regimes.
Can a handful of atoms outperform a much larger digital neural network on a real-world task? The answer may be yes. In a study published in Physical Review Letters, a team led by Prof. Peng Xinhua and Assoc. Prof. Li Zhaokai ...
Quantum Physics
Apr 3, 2026
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Quantum states are notoriously fragile, and can be destroyed simply through interactions, measurements, and exposure to their surrounding environments. In a new theoretical study published in Physical Review X, Rohan Mittal ...
Quantum computers, systems that process information leveraging quantum mechanical effects, could outperform classical computers on some computationally demanding tasks. Despite their potential, as the size of quantum computers ...
Studying and designing novel materials is a central application of quantum mechanics. Chemists, materials scientists, and physicists focus on subtle interactions in quantum materials and to uncover them they rely on sophisticated ...
Condensed Matter
Mar 26, 2026
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Researchers have proposed that a newly identified class of magnetic materials could extend the zero-resistance currents of superconductors to electron spins. Publishing their calculations in Physical Review X, Kyle Monkman ...
Physicists have directly visualized the fundamental electronic building blocks of flat-band quantum materials, a class of systems in which electron motion is effectively quenched and strong interactions give rise to emergent ...
Quantum Physics
Mar 21, 2026
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The ALICE Collaboration takes a step further in addressing the question of whether a quark–gluon plasma can be formed in proton–proton and proton–nucleus collisions. In the first few microseconds after the Big Bang, the universe ...
General Physics
Mar 20, 2026
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Over the past decades, quantum scientists have introduced various technologies that operate leveraging quantum mechanical effects, including quantum sensors, computers and memory devices. Most of these technologies leverage ...
Researchers at Rensselaer Polytechnic Institute (RPI) have created a new and unusual state of matter—known as a supersolid—by engineering how light and matter interact inside a nanoscale device. The work, published in Nature ...
Nanophysics
Mar 17, 2026
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212
Over the past decades, energy engineers have developed increasingly advanced battery technologies that can store more energy, charge faster and maintain their performance for longer. In recent years, some researchers have ...
