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The STOKES Monte Carlo radiative transfer code has been extended to model the velocity dependence of the polarization of emission lines. We use STOKES to present improved modelling of the velocity-dependent polarization of broad emission…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Rene W. Goosmann , C. Martin Gaskell , Frederic Marin

Besides their stunning physical properties which are unmatched in a classical world, squeezed states of electromagnetic radiation bear advanced application potentials in quantum information systems and precision metrology, including…

We report the experimental demonstration of polarization squeezed beam at 795 nm by combining a quadrature squeezed beam with a coherent beam. The quadrature squeezed beam is generated by a degenerate optical parametric amplifier based on a…

Quantum Physics · Physics 2018-03-14 Yashuai Han , Xin Wen , Jinyu Liu , Jun He , Junmin Wang

Motivated by a recent finding that Fresnel's phenomenological description of the optical activity in the chiral medium is not self-consistent, we conduct a thorough investigation into the nature of the polarization of a plane light wave. We…

Optics · Physics 2022-09-19 Chun-Fang Li , Zhi-Juan Hu

We perform a reconstruction of the polarization sector of the density matrix of an intense polarization squeezed beam starting from a complete set of Stokes measurements. By using an appropriate quasidistribution, we map this onto the…

The circular polarisation of gravitational waves from core collapse supernovae has been proposed as a probe to investigate the rotation and physical features inside the core of the supernovae. However, it is still unclear as to how…

High Energy Astrophysical Phenomena · Physics 2021-06-02 Man Leong Chan , Kazuhiro Hayama

Multi-level quantum protocols may potentially supersede standard quantum optical polarization-encoded protocols in terms of amount of information transmission and security. However, for free space telecomunications, we do not have tools for…

The low-frequency profiles of some pulsars manifest temporal broadening due to scattering, usually accompanied by flat polarization position angle (PA) curves. Assuming that the scattering works on the 4 Stokes parameters in the same way,…

Astrophysics · Physics 2008-11-26 X. H. Li , J. L. Han

We review the tools and procedures for the analysis of the data collected by X-ray photoelectric gas polarimeters, like the ones on-board the Imaging X-ray Polarimetry Explorer (IXPE). Although many of such tools are in principle common…

Instrumentation and Methods for Astrophysics · Physics 2023-04-05 Fabio Muleri

The Stokes equation describes the motion of fluids when inertial forces are negligible compared to viscous forces. In this article, we explore the consequence of parity-violating and non-dissipative (i.e. odd) viscosities on Stokes flows in…

Fluid Dynamics · Physics 2022-02-01 Tali Khain , Colin Scheibner , Michel Fruchart , Vincenzo Vitelli

We examine a proposal by Sherson and Moelmer to generate polarization-squeezed light in terms of the quantum stochastic calculus (QSC). We investigate the statistics of the output field and confirm their results using the QSC formalism. In…

Quantum Physics · Physics 2009-11-13 Gopal Sarma , Andrew Silberfarb , Hideo Mabuchi

When a molecule is exposed to a laser field, all field-free vibrational states become resonances, with complex quasi energies calculated using Floquet theory. There are many ways to produce the coalescences of pairs of such quasi energies,…

Quantum Physics · Physics 2015-05-27 Roland Lefebvre , Amine Jaouadi , Osman Atabek

We theoretically study the influence of laser polarization in inelastic scattering of electrons by hydrogen atoms in the presence of a circularly polarized laser field in the domain of field strengths below $10^{7}$ V/cm and high projectile…

Atomic Physics · Physics 2023-06-16 Gabriela Buică

A statistical model for the polarization of pulsar radio emission is enhanced to account for the heavy modulation of the emission, the possible covariance of the Stokes parameters, and the observed asymmetries in the distributions of total…

High Energy Astrophysical Phenomena · Physics 2022-10-12 M. M. McKinnon

In the optical pumping systems based on the pump-probe arrangement, the spin polarization of the atoms is generally monitored utilizing the probe laser beam, in which way an extra perturbation must be introduced and thus affects the normal…

Atomic Physics · Physics 2017-02-09 Jiancheng Fang , Rujie Li , Lihong Duan , Wenfeng Fan , Liwei Jiang

We consider pattern selection process in a wide aperture VCSEL near threshold. We show that for a square geometry of the laser aperture, the patterns formed at lasing threshold can be very complicated because of a possible misalignment…

Pattern Formation and Solitons · Physics 2007-05-23 I. V. Babushkin , N. A. Loiko , T. Ackemann

We discuss the analysis of polarization experiments with particular emphasis on those that measure the Stokes parameters on a ring on the sky. We discuss the ability of these experiments to separate the $E$ and $B$ contributions to the…

Astrophysics · Physics 2009-10-30 Matias Zaldarriaga

The self-consistent modeling of vacuum polarization due to virtual electron-positron fluctuations is of relevance for many near term experiments associated with high intensity radiation sources and represents a milestone in describing…

Plasma Physics · Physics 2021-07-07 Thomas Grismayer , Rui Torres , Pedro Carneiro , Fàbio Cruz , Ricardo Fonseca , Luís O. Silva

It is shown that polarized light can be polarization squeezed only if it exhibits sub-Poissonian statistics with the Mandel's Q factor less than -1/2.

Quantum Physics · Physics 2016-12-13 Ranjana Prakash , Namrata Shukla

Normalized quantum Stokes operators introduced in [Phys. Rev. A {\bf 95}, 042113 (2017)] enable one to better observe non-classical correlations of entangled states of optical fields with undefined photon numbers. For a given run of an…

Quantum Physics · Physics 2018-03-02 Junghee Ryu , Marcin Marciniak , Marcin Wieśniak , Dagomir Kaszlikowski , Marek Żukowski