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We report a combined experimental and theoretical study on the formation of O2+ by electronimpact double ionization and fragmentation of carbon dioxide (CO2) molecule. Through fragment ions and electron coincidence momentum imaging, we…

Atomic and Molecular Clusters · Physics 2025-09-09 Qibo Ma , Xintai Hao , Jiaqi Zhou , Xiaorui Xue , Qingrui Zeng , Peng Li , Lei Wang , Xueguang Ren

Exchange correlation plays an important role in double-ionization of complex atoms by ultrashort laser pulse. In this work, we investigate two-photon double inner-shell electron ionization of neon induced by an attosecond extreme…

Atomic Physics · Physics 2019-06-05 Jianpeng Liu , Yongqiang Li , Jianmin Yuan

Tunneling ionization followed by strong-field excitation leads to important ultrafast phenomena such as charge migration and lasing. Recent theoretical developments suggest that the population of the ionic excited state can be greatly…

Quantum Physics · Physics 2026-01-29 Chi-Hong Yuen

We address the influence of the molecular orbital geometry and of the molecular alignment with respect to the laser-field polarization on laser-induced nonsequential double ionization of diatomic molecules for different molecular species,…

Atomic Physics · Physics 2015-05-28 T. Shaaran , B. B. Augstein , C. Figueira de Morisson Faria

The elaborate energy and momentum spectra of ionized electrons from atoms in laser fields suggest that the ionization dynamics described by tunneling theory should be modified. Although many efforts have been done within semiclassical…

Atomic Physics · Physics 2019-04-09 Long Xu , Libin Fu

We address the influence of the orbital symmetry and of the molecular alignment with respect to the laser-field polarization on laser-induced nonsequential double ionization of diatomic molecules, in the length and velocity gauges. We work…

Atomic Physics · Physics 2009-11-13 C. Figueira de Morisson Faria , T. Shaaran , X. Liu , W. Yang

We develop a large scale quantum master equation approach to describe dynamical processes of practical open quantum systems driven by both coherent and stochastic interactions by including more than one thousand true states of the systems,…

Atomic Physics · Physics 2016-02-22 Yongqiang Li , Cheng Gao , Wenpu Dong , Jiaolong Zeng , Jianmin Yuan

A model for ionization and recombination collisions in a multifluid plasma is formulated using the framework introduced in previous work [{Phys. Plasmas} \textbf{22}, 093512 (2015)]. The exchange source terms for density, momentum and…

Plasma Physics · Physics 2016-06-22 H. P. Le , J. -L. Cambier

In this paper we show an approach to electron transport in double barrier structures which unifies the well known sequential and resonant tunneling models in the widest range of transport regimes, from completely coherent to completely…

Condensed Matter · Physics 2009-10-28 Giuseppe Iannaccone , Bruno Pellegrini

Inelastic tunneling through magnetically anisotropic molecules is studied theoretically in the presence of a strong magnetic field. Since the molecular orientation is not well controlled in tunneling experiments, we consider arbitrary…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 Carsten Timm

We consider tunnel ionization of an atom or molecule in a strong field within an analytical treatment of the R-matrix method, in which an imaginary boundary is set up inside the classically forbidden region that acts as a source of ionized…

Quantum Physics · Physics 2016-11-26 Emilio Pisanty

We study multiple ionization in proton collisions with water, methane, and ammonia molecules using an independent-atom model. Previous work on total (net) capture and ionization cross sections is extended to treat the multiple ionization…

Atomic Physics · Physics 2023-10-03 Hans Jürgen Lüdde , Marko Horbatsch , Tom Kirchner

For a quantum double well system interacting with a mesoscopic bath, it is shown that a single particle in the bath is sufficient to substantially reduce tunneling between the two wells. This is demonstrated by considering an ammonia…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 Onuttom Narayan , Harsh Mathur

Recent advances in on-surface chemistry, combined with scanning probe microscopy, have enabled the synthesis of correlated molecules on surfaces and the characterization of their chemical and electronic properties with unprecedented spatial…

Mesoscale and Nanoscale Physics · Physics 2026-03-25 Marco Lozano , Manish Kumar , Pavel Jelinek , Diego Soler-Polo

By performing an ensemble of molecular dynamics simulations, the model-dependent ionisation state is computed for strongly interacting systems self-consistently. This is accomplished through a free energy minimisation framework based on the…

The intermediate domain of strong-field ionization between the tunneling and the multiphoton regimes is investigated using the strong field approximation and the imaginary-time method. An intuitive model for the dynamics is developed which…

Quantum Physics · Physics 2015-06-22 M. Klaiber , K. Z. Hatsagortsyan , C. H. Keitel

Two main mechanisms dictate the tunneling process in a double quantum dot: overlap of excited wave functions, effectively described as a tunneling rate, and phonon-assisted tunneling. In this paper, we study different regimes of tunneling…

Quantum Physics · Physics 2020-01-08 Vladimir Vargas-Calderón , Herbert Vinck-Posada

We consider the final stage of double ionization of $\rm O_2$ molecules by short linearly polarized laser pulses. The saddles of the effective adiabatic potential energy close to which simultaneous escape of electrons from a molecule takes…

Atomic Physics · Physics 2007-05-23 Jakub S. Prauzner-Bechcicki , Krzysztof Sacha , Bruno Eckhardt

We consider double ionization of negative bromine ion in intense low-frequency electromagnetic fields. By solving numerically the two-electron time-dependent Schr{\" o}dinger equation we demonstrate that while for pulses of a few tens of…

Atomic Physics · Physics 2025-11-13 D. I. Tyurin , V. V. Strelkov , S. V. Popruzhenko

Diatomic molecules (e.g., O$_2$) in intense laser field exhibit a peculiar suppressed ionization behavior compared to their companion atoms. Several physical models have been proposed to account for this suppression while no consensus has…

Atomic Physics · Physics 2011-11-15 Z. Lin , X. Y. Jia , C. Wang , Z. Hu , H. Kang , W. Quan , X. Y. Lai , X. Liu , J. Chen , B. Zeng , W. Chu , J. P. Yao , Y. Cheng , Z. Z. Xu