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We present the results of experimental studies of photon-negative ion interactions involving the dynamics of two electrons. Resonances associated with doubly excited states of Li^- and He^- have been observed using laser photodetachment…

Atomic Physics · Physics 2015-06-26 D. Hanstorp , G. Haeffler , A. E. Klinkmueller , U. Ljungblad , U. Berzinsh , I. Yu. Kiyan , D. J. Pegg

The Jahn-Teller effect used semi-theoretically to analyse UV-visible spectra of the diamond like-carbon films on Si substrates. By deconvolution of UV-visible absorption spectra of the typical films, different absorption lines found. For…

Materials Science · Physics 2007-05-23 M. A. Vesaghi , A. Shafiekhani

The interrelation between disorder and interactions in two dimensional electron liquid is studied beyond weak coupling perturbation theory. Strong repulsion significantly reduces the electronic density of states on the Fermi level. This…

Disordered Systems and Neural Networks · Physics 2007-05-23 B. Rosenstein , Tran Minh-Tien

Recent experimental discoveries in axis-dependent conduction polarity, or goniopolarity, have observed that the charge carriers can conduct like either electrons or holes depending on the crystallographic direction they travel along in…

Materials Science · Physics 2020-09-23 Yaxian Wang , Prineha Narang

Resonant vibrational and rotation-vibration excitation cross sections for electron-CO scattering are calculated in the 0-10 eV energy range for all 81 vibrational states of CO, assuming that the excitation occur via the 2{\Pi} shape…

Chemical Physics · Physics 2012-08-14 V. Laporta , C. M. Cassidy , J. Tennyson , R. Celiberto

We have explored, computationally and experimentally, the magnetic properties of \fecob{} alloys. Calculations provide a good agreement with experiment in terms of the saturation magnetization and the magnetocrystalline anisotropy energy…

We examine electron-transport coefficients in magnetized hot and dense electron-ion plasma relevant in binary neutron star merger simulation. We calculate electrical and thermal conductivities in low density, high temperature, highly…

Nuclear Theory · Physics 2023-04-27 Sreemoyee Sarkar , Souvik Priyam Adhya

Coherent anti-Stokes Raman spectra (CARS) were obtained for CO$_2$ in a positive column discharge. The intensities of the Raman transitions to the $\nu_1 / 2\nu_2$ Fermi dyad decrease significantly when the discharge is turned on because of…

Chemical Physics · Physics 2007-05-23 Craig W. McCluskey , David S. Stoker

The dissociation of CO2 molecules in plasmas is a subject of enormous importance for fundamental studies and the recent interest in carbon capture and carbon-neutral fuels. The vibrational excitation of the CO2 molecule plays an important…

Chemical Physics · Physics 2017-09-27 Paola Diomede , Mauritius C. M. van de Sanden , Savino Longo

A superconducting qubit coupled to a microwave resonator provides a controllable system that enables fundamental studies of light-matter interactions. In the dispersive regime, photons in the resonator exhibit induced frequency and phase…

CoTi$_{2}$O$_{5}$ has the paradox that low temperature static magnetic order is incompatible with the crystal structure owing to a mirror plane that exactly frustrates magnetic interactions. Despite no observable structural distortion with…

Rate coefficients for dissociative recombination and state-to-state rotational transitions of the D$_{2}^{+}$ ion induced by collisions with very low-energy electrons have been reported following our previous studies on HD$^{+}$ and…

Atomic Physics · Physics 2022-03-30 M. D. Epée Epée , O. Motapon , N. Pop , F. Iacob , E. Roueff , I. F. Schneider , J. Zs Mezei

Motivated by recent experiments we analyse the classical dynamics of a hydrogen atom in parallel static and microwave electric fields. Using an appropriate representation and averaging approximations we show that resonant ionisation is…

Quantum Physics · Physics 2009-11-10 D. Richards

We consider an optical resonator containing a photonic crystal fiber and driven coherently by an injected beam. This device is described by a generalized Lugiato-Lefever equation with fourth order dispersion. We use an asymptotic approach…

Optics · Physics 2021-06-09 Andrei G. Vladimirov , Mustapha Tlidi , Majid Taki

Rydberg-atom ensembles are switched from a weakly- into a strongly-interacting regime via adiabatic transformation of the atoms from an approximately non-polar into a highly dipolar quantum state. The resultant electric dipole-dipole forces…

Atomic Physics · Physics 2016-11-16 N. Thaicharoen , L. F. Gonçalves , G. Raithel

The role of a large dipole moment in rotating neutral molecules interacting with low-energy electrons is studied using an accurate {\it ab initio} approach accounting for electronic and rotational degrees of freedom. It is found that theory…

Atomic Physics · Physics 2023-05-03 Joshua Forer , Viatcheslav Kokoouline , Thierry Stoecklin

We study quasi-two-dimensional dipolar Bose-Einstein condensates, in which the Bogoliubov excitation spectrum displays, at sufficiently large gas density, a deep roton minimum due to the spatially anisotropic behavior of the dipolar…

Quantum Physics · Physics 2018-06-29 Zehua Tian , Seok-Yeong Chä , Uwe R. Fischer

We report the measurement of ultrafast relaxation dynamics of excited states of carbon dioxide molecule using time-resolved pump-probe photoelectron spectroscopy. Neutral ground state carbon dioxide is excited to $nd\sigma_g$ Henning sharp…

Atomic Physics · Physics 2024-07-26 D. Biswas , J. K. Wood , I. Shalaby , A. Sandhu

We investigate the behavior of relativistic electrons encountering a potential step through analogies with optical phenomena. By accounting for the conservation of Dirac current, we elucidate that the Goos-H\"anchen shift can be understood…

Quantum Physics · Physics 2023-10-31 Yue Ban , Xi Chen

We theoretically examine the neutral atom-molecule analogue of the anomalous quantum correlations between degenerate electrons, i.e., Cooper pairs, that are responsible for superconductivity. Based on rogue dissociation of triatomic…

Atomic Physics · Physics 2007-05-23 Matt Mackie , Jyrki Piilo , Olavi Dannenberg
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