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Mardirossian, N. & M. H.-G. Thirty years of density functional theory in…
Category: 4. Physics
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Ideal topological flat bands in chiral symmetric moiré systems from non-holomorphic functions
A simple example
We begin our discussion by examining a simple example that illustrates the key properties of this new family of exact flat bands. For demonstration purposes, we select a model whose Hamiltonian and eigenwavefunctions take the…
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Critical velocity criterion of explosive charges initiated by fragment impact considering impact angle and charge radius
Numerical simulation model
In the case of interaction between fragments and explosive charges, there were both deformation processes of fragments and explosive charges, as well as the shock initiation process of explosives. The Lagrange algorithm…
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![Elucidation of crystal growth, structural characterization, thermal properties, and molecular dynamics using NMR near phase transition temperature of [N(CH3)4]2CoCl4](https://scienewsd.appsfornexus.com/wp-content/uploads/2025/08/41598_2025_11360_Fig1_HTML.png)
Elucidation of crystal growth, structural characterization, thermal properties, and molecular dynamics using NMR near phase transition temperature of [N(CH3)4]2CoCl4
Phase transition temperature
After grinding [N(CH3)4]2CoCl4 single crystals into a fine powder, DSC experiments were performed at a heating rate of 10 °C/min using a sample weight of 2.6 mg. As shown in Fig. 1, three subtle endothermic peaks…
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JWST Looks Within for Dark Matter
• Physics 18, s105
Researchers have analyzed “blank” calibration images, seeking signs of dark matter moving through the telescope.
NASA
Since its launch in 2021, the JWST has observed not just galaxies at the edge of…
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Physics – Quantum Scrambling Goes Anomalous
• Physics 18, s103
Evidence that quantum information can get scrambled unconventionally in a chain of atoms could improve our understanding of quantum many-body dynamics.
X. Liang/Tsinghua University
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Higher glass transition temperatures reduce thermal stress cracking in aqueous solutions relevant to cryopreservation
Theoretical considerations
Thermal stress, though in practice a function of several interacting thermophysical phenomena (e.g. thermal diffusivity, temperature-dependent viscosity), exists due only to one: thermal expansion. In the limit of zero…
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Energy-time and time-bin entanglement: past, present and future
Schrödinger, E. Discussion of probability relations between separated systems. Proc. Camb. Philos. Soc. 31, 555 (1935).
Einstein, A., Podolsky, B. & Rosen, N. Can quantum-mechanical…
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Deterministically separable polarization-entangled photons from battery-powered diode lasers
Device design
The BRL is an AlGaAs heterostructure whose fabrication details are discussed in Sec. IV D, and a general overview of the structure is depicted in Fig. 1. BRLs are designed to lase in the Bragg mode60,61, where the 1D Bragg stack is…
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Protecting gauge symmetries in the dynamics of SU(3) lattice gauge theories
A suitable framework to study dynamics: LSH framework
As mentioned in the Introduction, we focus on a particular framework, namely the LSH framework developed for SU(2)4 and SU(3)108,109 gauge theories in 1 + 1 dimensions. The SU(2) framework has…
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