Quantum fluids and solids are many-body physical systems in which quantum mechanical effects, such as wavefunction coherence, zero-point motion, and quantization of circulation, dominate macroscopic behavior. Quantum fluids include systems like superfluid helium and ultracold atomic Bose–Einstein condensates, characterized by frictionless flow, quantized vortices, and collective excitations described by Bogoliubov theory or hydrodynamic formalisms. Quantum solids, such as solid helium, exhibit significant zero-point motion, tunneling, and in some regimes potential supersolid behavior with simultaneous crystalline order and superfluid-like response. These systems serve as platforms for studying strongly correlated quantum phases, emergent quasiparticles, and quantum phase transitions under controlled thermodynamic conditions.
A new study has demonstrated that it is possible to make a network of atoms and photons that could improve how artificial intelligence stores and recalls memories. This network, called a quantum-optical spin glass, works ...
Optics & Photonics
Sep 3, 2026
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Neutrinos are pervasive yet intangible particles that permeate the universe, streaming through whole planets, stars and our bodies by the trillions each second. The elementary particles are often described as "ghostly" for ...
Optics & Photonics
Sep 2, 2026
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Quasiparticles arise from the complex interaction of many particles in solids; for example, we describe lattice vibrations in crystals as phonons. Fractons are exotic quasiparticles that occur at the vertices of magnetic ...
Condensed Matter
Aug 21, 2026
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Researchers at Monash University have predicted a new type of quantum matter that challenges decades of thinking about how ultracold particles behave. The paper, "Quantum droplets in a resonant Bose-Fermi mixture," is published ...
Condensed Matter
Aug 17, 2026
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Researchers at the University of Basel and the Technical University of Munich have developed a new method to reveal the collective motion of electrons in one of the most elusive states of matter: the Wigner crystal. Using ...
Optics & Photonics
Aug 11, 2026
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An international team of researchers has succeeded in producing atomic quantum gas mixtures with an unprecedented particle flux. In the journal Nature Communications, the scientists report on experiments conducted with the ...
Optics & Photonics
Aug 5, 2026
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Bose-Einstein condensates (BECs) are often described as a "fifth state of matter": a quantum state in which many particles lose their individual identities and behave as one collective object. For more than 60 years, researchers ...
Condensed Matter
Aug 4, 2026
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Researchers at RPTU University Kaiserslautern-Landau have achieved a key experimental breakthrough: For the first time, the spontaneous macroscopic coherence of magnons—the quantized excitations of magnetic materials—has ...
Quantum Physics
Jul 14, 2026
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Quantum computers, devices that store and process information leveraging the principles of quantum mechanics, have been found to be promising for tackling some problems that cannot be solved by classical computers. Quantum ...
In a new study published in Nature Physics, researchers have demonstrated the Hong–Ou–Mandel (HOM) effect with up to 12 indistinguishable neutral atoms—an effect that has been predominantly observed in photonic systems.
