Results 31 to 40 of about 988,957 (292)

Some applications of excited-state-excited-state transition densities [PDF]

open access: yesPhysical Review A, 1975
We derive an approximation for transition moments between excited states consistent with the approximations and assumptions normally used to obtain transition moments betwen the ground and excited states in the random-phase approximation and its higher-order approximations. We apply the result to the calculation of the photoionization cross sections of
Yeager, D. L.   +2 more
openaire   +2 more sources

Subsystem distances between quasiparticle excited states

open access: yesJournal of High Energy Physics, 2022
We investigate the subsystem Schatten distance, trace distance and fidelity between the quasiparticle excited states of the free and the nearest-neighbor coupled fermionic and bosonic chains and the ferromagnetic phase of the spin-1/2 XXX chain.
Jiaju Zhang, M. A. Rajabpour
doaj   +1 more source

Excited States of Ladder-type Poly-p-phenylene Oligomers

open access: yes, 2000
Ground state properties and excited states of ladder-type paraphenylene oligomers are calculated applying semiempirical methods for up to eleven phenylene rings. The results are in qualitative agreement with experimental data.
A. Köhler   +33 more
core   +2 more sources

Quantitative wave function analysis for excited states of transition metal complexes [PDF]

open access: yes, 2018
The character of an electronically excited state is one of the most important descriptors employed to discuss the photophysics and photochemistry of transition metal complexes.
Daniel, Chantal   +5 more
core   +2 more sources

Calculating vibrational excited state absorptions with excited state constrained minimized energy surfaces

open access: yesThe Journal of Physical Chemistry A, 2023
The modeling and interpretation of vibrational spectra are crucial for studying reaction dynamics using vibrational spectroscopy. Previous theoretical developments have mainly focused on fundamental vibrational transitions. In this study, we present a new method that uses excited state constrained minimized energy surfaces (CMES) to describe ...
Yiwen Wang, Zehua Chen, Yang Yang
openaire   +2 more sources

A Note on Calm Excited States of Inflation

open access: yes, 2011
We identify a two-parameter family of excited states within slow-roll inflation for which either the corrections to the two-point function or the characteristic signatures of excited states in the three-point function -- i.e.
Ashoorioon, Amjad, Shiu, Gary
core   +2 more sources

Singlet Excited States of Anions with Higher Main Group Elements

open access: yes, 2013
Previous studies have shown that dipole-bound excited states exist for certain small anions. However, valence excited states have been reported for some closed-shell anions, but those with singlet valence excited states have, thus far, contained a single
Fortenberry, Ryan C.
core   +1 more source

Stimulated resonant inelastic x-ray scattering with chirped, broadband pulses

open access: yes, 2018
We present an approach for initiating and tracing ultra-fast electron dynamics in core-excited atoms, molecules and solids. The approach is based on stimulated resonant inelastic x-ray scattering induced by a single, chirped, broadband XUV/x-ray pulse. A
Hollstein, Maximilian, Rohringer, Nina
core   +2 more sources

Analysis of excited quark propagator effects on neutron charge form factor

open access: yes, 2019
The charge form factor and charge radius of neutron are investigated in the perturbative chiral quark model (PCQM) with considering both the ground and excited states in the quark propagator.
Khosonthongkee, K.   +5 more
core   +1 more source

Cluster structures of excited states in $^{14}$C

open access: yes, 2011
Structures of excited states in $^{14}$C are investigated with a method of $\beta$-$\gamma$ constraint antisymmetrized molecular dynamics in combination with the generator coordinate method.
Tadahiro Suhara   +2 more
core   +1 more source

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