The Electron Is So Round That It’s Ruling Out New Particles | Quanta Magazine
https://www.quantamagazine.org/the-electron-is-so-round-that-its-ruling-out-new-particles-20230410/
https://www.quantamagazine.org/the-electron-is-so-round-that-its-ruling-out-new-particles-20230410/
Quanta Magazine
The Electron Is So Round That It’s Ruling Out Potential New Particles
If the electron’s charge wasn’t perfectly round, it could reveal the existence of hidden particles. A new measurement approaches perfection.
Do you struggle understanding the number of roots to use on a CAS calculation? (You are not alone).
This paper explains how this works and even give a table for each electronic configuration:
📄 OPEN ACCESS - Assessment of minimal active space CASSCF-SO methods for calculation of atomic Slater–Condon and spin–orbit coupling parameters in d- and f-block ions (Dalton Trans., 2021,50, 14130-14138)
🔗 https://pubs.rsc.org/en/content/articlelanding/2021/DT/D1DT02346B
This paper explains how this works and even give a table for each electronic configuration:
📄 OPEN ACCESS - Assessment of minimal active space CASSCF-SO methods for calculation of atomic Slater–Condon and spin–orbit coupling parameters in d- and f-block ions (Dalton Trans., 2021,50, 14130-14138)
🔗 https://pubs.rsc.org/en/content/articlelanding/2021/DT/D1DT02346B
pubs.rsc.org
Assessment of minimal active space CASSCF-SO methods for calculation of atomic Slater–Condon and spin–orbit coupling parameters…
Slater–Condon parameters and the spin–orbit (SO) coupling constants for various oxidation states of transition metal ions (3d/4d/5d) and trivalent f-block ions were calculated using minimal active space complete active space self-consistent field (CASSCF)…
mulliken1932.pdf
388.5 KB
The original paper by Mulliken that is the foundation of Molecular Orbital Theory: Phys Rev 40, 55–62 (1932)
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Scientists use computational modeling to design “ultrastable” materials | MIT News | Massachusetts Institute of Technology
https://news.mit.edu/2023/scientists-computational-modeling-design-ultrastable-materials-0404
https://news.mit.edu/2023/scientists-computational-modeling-design-ultrastable-materials-0404
MIT News
Scientists use computational modeling to design “ultrastable” materials
MIT researchers developed a computational approach to predict which metal-organic framework (MOF) structures will be the most stable, and therefore the best candidates for applications such as capturing greenhouse gases.
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HOMO-LUMO gap is the energy that separates the last occupied and first unoccupied molecular orbitals. With that said, can an electronic transition occur in energies less than the HOMO-LUMO gap?
Anonymous Quiz
53%
Yes
47%
No
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X-rays reveal electronic details of nickel-based superconductors
https://phys.org/news/2023-04-x-rays-reveal-electronic-nickel-based-superconductors.html
https://phys.org/news/2023-04-x-rays-reveal-electronic-nickel-based-superconductors.html
phys.org
X-rays reveal electronic details of nickel-based superconductors
Scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory have discovered new details about the electrons in a nickel-based family of superconducting materials. The research, ...
A machine learning model for identifying new compounds to fight against global warming
https://phys.org/news/2023-04-machine-compounds-global.html
https://phys.org/news/2023-04-machine-compounds-global.html
phys.org
A machine learning model for identifying new compounds to fight against global warming
Among all greenhouse gases, carbon dioxide is the highest contributor to global warming. If we do not take action by 2100, according to the Intergovernmental Panel on Climate Change, the average temperature ...
Heaviest Schrödinger cat achieved by putting a small crystal into a superposition of two oscillation states
https://phys.org/news/2023-04-heaviest-schrdinger-cat-small-crystal.html
https://phys.org/news/2023-04-heaviest-schrdinger-cat-small-crystal.html
phys.org
Heaviest Schrödinger cat achieved by putting a small crystal into a superposition of two oscillation states
Even if you are not a quantum physicist, you will most likely have heard of Schrödinger's famous cat. Erwin Schrödinger came up with the feline that can be alive and dead at the same time in a thought ...
Hydrogen’s Hidden Phase: Machine Learning Unlocks the Secrets of the Universe’s Most Abundant Element
https://scitechdaily.com/hydrogens-hidden-phase-machine-learning-unlocks-the-secrets-of-the-universes-most-abundant-element/
https://scitechdaily.com/hydrogens-hidden-phase-machine-learning-unlocks-the-secrets-of-the-universes-most-abundant-element/
SciTechDaily
Hydrogen’s Hidden Phase: Machine Learning Unlocks the Secrets of the Universe’s Most Abundant Element
Putting hydrogen on solid ground: simulations with a machine learning model predict a new phase of solid hydrogen. A machine-learning technique developed by University of Illinois Urbana-Champaign researchers has revealed a previously undiscovered high-pressure…
OPEN ACCESS
Measuring Electron Correlation: The Impact of Symmetry and Orbital Transformations
https://pubs.acs.org/doi/10.1021/acs.jctc.3c00122
Measuring Electron Correlation: The Impact of Symmetry and Orbital Transformations
https://pubs.acs.org/doi/10.1021/acs.jctc.3c00122
ACS Publications
Measuring Electron Correlation: The Impact of Symmetry and Orbital Transformations
In this perspective, the various measures of electron correlation used in wave function theory, density functional theory and quantum information theory are briefly reviewed. We then focus on a more traditional metric based on dominant weights in the full…
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The death of open access mega-journals?
https://phys.org/news/2023-03-death-access-mega-journals.html
https://phys.org/news/2023-03-death-access-mega-journals.html
phys.org
The death of open access mega-journals?
The entire scientific publishing world is currently undergoing a massive stress test of quantity vs. quality, open access (free) vs. institutional subnoscriptions (paywall), and how to best judge the integrity ...
Chemists tackle the tough challenge of recycling mixed plastics
https://phys.org/news/2023-04-chemists-tackle-tough-recycling-plastics.html
https://phys.org/news/2023-04-chemists-tackle-tough-recycling-plastics.html
phys.org
Chemists tackle the tough challenge of recycling mixed plastics
Plastics are everywhere in our daily lives, but not all plastics are created equal—far from it.
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