Lattice models in condensed matter are theoretical techniques that discretize space into a regular array of sites, enabling the formulation and analysis of many-body Hamiltonians with localized degrees of freedom. They provide controlled frameworks for studying electronic, magnetic, and bosonic systems via simplified but microscopically motivated interactions, such as in the Ising, Heisenberg, Hubbard, and tight-binding models. These models facilitate analytical methods (mean-field theory, renormalization group, spin-wave theory), numerical approaches (exact diagonalization, quantum Monte Carlo, DMRG), and effective field theories, allowing systematic investigation of phase transitions, quasiparticle excitations, topological order, and emergent phenomena in strongly correlated materials.
Experimental atomic physicists have discovered there is a maximum amount of electrical resistance, or resistivity, that can result from collisions between electrons.
General Physics
11 hours ago
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Using a conventional computer and cutting-edge mathematical tools and code, physicists at the Center for Computational Quantum Physics (CCQ) at the Simons Foundation's Flatiron Institute and collaborators at Boston University ...
Quantum Physics
May 21, 2026
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In thermodynamics, an "adiabatic process" is a system change that transfers no heat in or out of the system. Any and all energy change in that system are therefore accomplished by doing work on the system, work being action ...
A new method developed at LMU overcomes fundamental resolution limits and may provide insights into high-temperature superconductivity. Physicist Dr. Sebastian Paeckel has developed a method that can be used to calculate ...
Superconductivity
Apr 22, 2026
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In a paper published today in Nature Synthesis, a team from the lab of University of Chicago Pritzker School of Molecular Engineering (UChicago PME) and Chemistry Department Prof. Paul Alivisatos explores the role of cation ...
Nanophysics
Mar 11, 2026
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Rydberg atoms are atoms with one or more outer electrons excited to very high energy levels, which interact very strongly with each other. These atoms are widely used to run quantum simulations and develop quantum technologies, ...
Physicists in China have unveiled new clues to the origins of high-temperature superconductivity in an iron-based material just a single unit-cell thick. Led by Qi-Kun Xue and Lili Wang at Tsinghua University, the team's ...
Leiden physicists Daniela Kraft and Julio Melio have created soft structures that can take on different shapes without any external drive in their lab. They present their research on microscale metamaterials in Nature—a breakthrough ...
General Physics
Feb 25, 2026
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In the everyday world, governed by classical physics, the concept of equilibrium reigns. If you put a drop of ink into water, it will eventually evenly mix. If you put a glass of ice water on the kitchen table, it will eventually ...
Quantum Physics
Feb 18, 2026
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Quantum computer research is advancing at a rapid pace. Today's devices, however, still have significant limitations: For example, the length of a quantum computation is severely limited—that is, the number of possible interactions ...
Quantum Physics
Feb 18, 2026
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