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most citedVisible Imaging of Incoherent 1200-nm Light via Triplet--Triplet Annihilation Upconversion

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physics.chem-ph2026

Elucidating Norrish Type-I reactive pathways by ultrafast X-ray absorption spectroscopy

Martin Graßl, Pablo Unzueta, Andreas E. Hillers-Bendtsen +20

Norrish type I reactions selectively cleave carbon-carbon bonds directly adjacent to carbonyl groups. Despite their broad use in combination with aromatic carbonyls for additive ma…

physics.chem-ph2025

Extending orbital-optimized density functional theory to L-edge XPS and beyond: Spin-orbit coupling via non-orthogonal quasi-degenerate perturbation theory

Richard Kang, Leonardo A. Cunha, Diptarka Hait +1

Quantum mechanical calculations of core electron binding energies (CEBEs) leading to 2p hole states are relevant to interpreting L-edge x-ray photo-electron spectroscopy (XPS), as…

physics.chem-ph2025

Locating Ab Initio Transition States via Approximate Geodesics on Machine Learned Potential Energy Surfaces

Diptarka Hait, Jan D. Estrada Pabón, Martin Stöhr +1

Efficient and reliable identification and optimization of transition state structures is a longstanding challenge in computational chemistry. Popular chain-of-states methods requir…

physics.chem-ph2024

Fast and Scalable GPU-Accelerated Quantum Chemistry for Periodic Systems with Gaussian Orbitals: Implementation and Hybrid Density Functional Theory Calculations

Yuanheng Wang, Diptarka Hait, Pablo A. Unzueta +2

Efficient hybrid DFT simulations of solid state materials would be extremely beneficial for computational chemistry and materials science, but is presently bottlenecked by difficul…

physics.chem-ph2024

Extending GPU-Accelerated Gaussian Integrals in the TeraChem Software Package to f Type Orbitals: Implementation and Applications

Yuanheng Wang, Diptarka Hait, K. Grace Johnson +4

The increasing availability of GPUs for scientific computing has prompted interest in accelerating quantum chemical calculations through their use. The complexity of integral kerne…

physics.chem-ph2024

Attosecond Probing of Coherent Vibrational Dynamics in CBr

Jen-Hao Ou, Diptarka Hait, Patrick Rupprecht +3

A coherent vibrational wavepacket is launched and manipulated in the symmetric stretch (a) mode of CBr, by impulsive stimulated Raman scattering from non-resonant 400 nm la…