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Nonsequential two-photon ionization of inner-shell $np$ subshell of neutral atoms by circularly polarized light is investigated. Detection of subsequent fluorescence as a signature of the process is proposed and the dependence of…

Atomic Physics · Physics 2019-07-17 J. Hofbrucker , A. V. Volotka , S. Fritzsche

When polarized light is absorbed by an atom, the excited atomic system carries information about the initial polarization of light. For the light that carries an orbital angular momentum, or the twisted light, the polarization states are…

Quantum Physics · Physics 2020-05-18 Andrei Afanasev , Carl E. Carlson , Hao Wang

The angular distribution of the emitted electrons, following the two--photon ionization of the hydrogen--like ions, is studied within the framework of second order perturbation theory \textit{and} the Dirac equation. Using a density matrix…

Atomic Physics · Physics 2007-05-23 Peter Koval , Stephan Fritzsche , Andrey Surzhykov

We compute the photon polarization tensor at one-loop order in the presence of a constant and uniform electric field. Our calculation is carried out for arbitrary field strength using the Schwinger proper-time formalism, and we explicitly…

High Energy Physics - Theory · Physics 2025-08-06 Luis A. Hernández , Juan D. Martínez-Sánchez , R. Zamora

The angular and polarization properties of the photon pair emitted in the two--photon decay of $2s$ hyperfine states in hydrogenlike ions are investigated within the relativistic Dirac framework and second order perturbation theory. The…

Atomic Physics · Physics 2012-03-30 Filippo Fratini

We investigate the propagation of electromagnetic waves through materials displaying a non-linear Hall effect. The coupled Maxwell-Boltzmann equations for traveling waves can be mapped onto ordinary differential equations that resemble…

Mesoscale and Nanoscale Physics · Physics 2024-12-06 Falko Pientka , Inti Sodemann Villadiego

The probability of photon emission of a charged particle traversing a strong field becomes modified if vacuum polarization is considered. This feature is important for fundamental quantum electrodynamics processes present in extreme…

High Energy Physics - Phenomenology · Physics 2023-05-24 M. Jirka , P. Sasorov , S. V. Bulanov

We review the problem of proton beam bombardment of solar chromosphere considering the self-consistent NLTE polarized radiation transfer in hydrogen lines. Several observations indicate a linear polarization of the H-alpha line of the order…

Astrophysics · Physics 2008-11-26 Jiri Stepan

The polarization state of the optical electromagnetic field lying several nanometers above complex dielectric structures reveals the intricate light-matter interaction that occurs in this near-field zone. This information can only be…

By means of the optical metric, we investigate the propagation of a polarized light in an inhomogeneous medium in this paper. We find that the evolution of photons is affected by the spin-spin interaction of photons, besides the spin-orbit…

Optics · Physics 2015-06-15 Hehe Li , Zhigang Bu , Yuee Luo , Wenbo Chen , Peiyong Ji

Using spontaneous parametric down conversion and a 50:50 beam splitter, we generate coaxial polarization-entangled photon pairs, of which the two photons are far separated from each other. The photons are then sent one by one through one…

Quantum Physics · Physics 2010-05-06 Xian-Min Jin , Cheng-Zhi Peng , Tao Yang , Youjin Deng

The propagation of polarized photons in optical media can be effectively modeled by means of quantum dynamical semigroups. These generalized time evolutions consistently describe phenomena leading to loss of phase coherence and dissipation…

Quantum Physics · Physics 2009-11-07 F. Benatti , R. Floreanini

We study polarization effects in the nonlinear interference of photons generated via frequency non-degenerate spontaneous parametric down conversion. Signal and idler photons generated in the visible and infrared (IR) range, are split in…

Quantum Physics · Physics 2020-12-03 Anna Paterova , Hongzhi Yang , Chengwu An , Dmitry Kalashnikov , Leonid Krivitsky

Rigorous implementation of the effects of collisions in modeling the formation of the polarized solar lines is of utmost importance in order to realistically analyze the available, highly sensitive solar spectropolarimetric observations.…

Solar and Stellar Astrophysics · Physics 2024-02-02 Moncef Derouich , Saleh Qutub

Exact stationary solutions of the wave equation are obtained to describe the interaction between magnetic moment of elementary particle and circularly polarized photons. The obtained solutions substantially modify the conventional model of…

Quantum Physics · Physics 2009-01-30 O. V. Kibis

Polarization observables for the reaction $\bar p+p\to e^++e^-$ are given in terms of three independent complex amplitudes, in presence of two photon exchange. General expressions for the differential cross section and the polarization…

Nuclear Theory · Physics 2009-11-11 G. I. Gakh , E. Tomasi--Gustafsson

Particles in a hidden sector can potentially acquire a small electric charge through their interaction with the Standard Model and can consequently be observed as millicharged particles. We systematically compute the production of…

High Energy Physics - Phenomenology · Physics 2016-11-30 Emidio Gabrielli , Luca Marzola , Edoardo Milotti , Hardi Veermäe

If identical photons meet at a semi-transparent mirror they appear to leave in the same direction, an effect called "two-photon interference". It has been known for some time that this effect should occur for photons generated by dissimilar…

Quantum Physics · Physics 2010-06-07 A. J. Bennett , R. B. Patel , C. A. Nicoll , D. A. Ritchie , A. J. Shields

We propose to measure the linear polarization of the external electromagnetic fields of a relativistic heavy ion through azimuthal asymmetries in dilepton production in ultraperipheral collisions. The asymmetries estimated with the…

High Energy Physics - Phenomenology · Physics 2019-07-10 Cong Li , Jian Zhou , Ya-jin Zhou

The process of electron-positron annihilation into two photons in the presence of an intense classical plane wave of an arbitrary shape is investigated analytically by employing light-cone quantization and by taking into account the effects…

High Energy Physics - Phenomenology · Physics 2020-12-29 S. Bragin , A. Di Piazza