Charge Exchange Dynamics
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Charge Exchange Dynamics in Cold Collisions of $^{40}$CaH$^+$ and $^{39}$K
arXiv:2602.09142v2 Announce Type: replace Abstract: We report the observation of charge-exchange collisions between trapped calcium monohydride molecular ions ($^{40}$CaH$^+$) and ultracold potassium atoms ($^{39}$K) in a hybrid ion-atom trap. The measured charge-exchange rate coefficient is significantly suppressed relative to the Langevin rate constant for the system. We use $\mathit{ab\ initio}$ quantum-chemical calculations to model the (CaH-K)$^+$ complex in the ground and excited...
Light-induced quantum friction of carbon nanotubes in water
Abstract Friction slows down moving objects at both macroscopic and microscopic scales1. At the electronic level, quantum friction describes direct transfer of momentum between a liquid and the electrons of a solid2. Owing to its microscopic nature, this phenomenon remains experimentally challenging to capture3.
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Bessent spars with Dem in fiery Trump tax showdown until claim crosses the line: ‘Slanderous’
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Praggnanandhaa becomes first Indian to raid Carlsen's backyard, win Norway Chess title
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The Betrayal of Black Patriots
Photographs by Nate Langston PalmerDaniel “Chappie” James Jr. became commander of the Wheelus Air Base, near Tripoli, just after rebels under Muammar Qaddafi took control of Libya in a coup in 1969. In the midst of the insurgency, Qaddafi led an effort to break into the U.S. air base, but James managed to close the gate in time to prevent the young rebel from entering. The incident, which James recounted in a 1978 interview, would come to be the stuff of Air Force lore.