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.
MIT physicists and colleagues have for the first time measured the geometry, or shape, of electrons in solids at the quantum level. Scientists have long known how to measure the energies and velocities of electrons in crystalline ...
Condensed Matter
Dec 22, 2024
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1976
Understanding and reliably measuring the geometric properties of quantum states can shed new light on the intricate underpinning of various physical phenomena. The quantum geometric tensor (QGT) is a mathematical object that ...
Physicists have long theorized the existence of a unique state of matter known as a quantum spin liquid. In this state, magnetic particles do not settle into an orderly pattern, even at absolute zero temperature. Instead, ...
Quantum Physics
Dec 12, 2024
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An interdisciplinary collaboration between condensed-matter, quantum-optics and particle physicists has the potential to crack the search for low-mass dark matter. The proposed quantum detector builds on EQUS studies of elementary ...
General Physics
Dec 6, 2024
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MIT physicists have shown that it should be possible to create an exotic form of matter that could be manipulated to form the qubit (quantum bit) building blocks of future quantum computers that are even more powerful than ...
Condensed Matter
Nov 18, 2024
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170
Electrons typically travel at high speeds, zipping through matter unbound. In the 1930s, physicist Eugene Wigner predicted that electrons could be coaxed into stillness at low densities and cold temperatures, forming an electron ...
Condensed Matter
Nov 7, 2024
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119
Supersolids are a new form of quantum matter that has only recently been demonstrated. The state of matter can be produced artificially in ultracold, dipolar quantum gases. A team led by Innsbruck physicist Francesca Ferlaino ...
Condensed Matter
Nov 6, 2024
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194
Researchers from Skoltech, the University of Warsaw, and the University of Iceland have demonstrated that by optical means it is possible to excite and stir an exciton-polariton condensate, which emits a linearly polarized ...
Condensed Matter
Nov 5, 2024
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71
A 3D quantum spin liquid has been discovered in the vicinity of a member of the langbeinite family. The material's specific crystalline structure and the resulting magnetic interactions induce an unusual behavior that can ...
Soft Matter
Aug 23, 2024
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191
In a paper published in the Applied Physics Letters journal, a group of scientists demonstrated that under optical excitation, a polariton condensate can simultaneously occupy two closely spaced energy levels, which results ...
Condensed Matter
Jul 9, 2024
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