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We propose a method to accurately calculate the momentum distributions and the phase distributions of the probability amplitude for both boson and fermion pair production in a spatially homogeneous and time-dependent electric field.…

High Energy Physics - Phenomenology · Physics 2026-03-27 R. Z. Jiang , Z. L. Li , Y. J. Li

Spontaneous emission of a photon by an atom is described theoretically in three dimensions with the initial wave function of a finite-mass atom taken in the form of a finite-size wave packet. Recoil and wave-packet spreading are taken into…

Quantum Physics · Physics 2009-11-10 M. V. Fedorov , M. A. Efremov , A. E. Kazakov , K. W. Chan , C. K. Law , J. H. Eberly

We show that the orbital angular momentum (OAM) of electrons is dynamically induced by circularly polarized phonons. The induced OAM originates from the adiabatic evolution in which electrons acquire Berry phase formulated in terms of the…

Mesoscale and Nanoscale Physics · Physics 2026-03-17 Dapeng Yao , Dongwook Go , Yuriy Mokrousov , Shuichi Murakami

We derive exact expressions, in the form of Fourier integrals over the (k,w) domain, for the energy, momentum, and angular momentum of a light pulse propagating in free space. The angular momentum is seen to split naturally into two parts.…

Optics · Physics 2012-05-29 Masud Mansuripur

The past decades have seen substantial interest in the so-called orbital angular momentum (OAM) of light, driven largely by its diverse range of applications. However, there are fundamental theoretical issues with decomposing the angular…

Mathematical Physics · Physics 2025-06-17 Eric Palmerduca , Hong Qin

We study the correlation properties of single photons carrying orbital angular momentum (OAM) in a Hanbury Brown and Twiss (HBT) type experiment. We have characterized single photon sources obtained by pumping a nonlinear crystal with a…

Quantum Physics · Physics 2025-11-20 Nijil Lal , Anindya Banerji , Ayan Biswas , Ali Anwar , R. P. Singh

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

We explore the evolution of vortex light in the presence of gravitational waves (GWs) and demonstrate that the quantized orbital angular momentum (OAM) states can make transitions to other states due to the GWs. The interaction is…

General Relativity and Quantum Cosmology · Physics 2026-04-08 Haorong Wu , Xilong Fan , Lixiang Chen

We analyse recently measured nonlinear photoemission spectra from Ag surfaces that reveal resonances whose energies do not scale with the applied photon energy but stay pinned to multiples of bulk plasmon energy $\hbar\omega_p$ above the…

Materials Science · Physics 2021-05-05 Dino Novko , Vito Despoja , Marcel Reutzel , Andi Li , Hrvoje Petek , Branko Gumhalter

Contrary to the optical spin angular momentum (SAM), the role played by the orbital angular momentum (OAM) of light in magneto-optics remains largely unexplored. However, the SAM and OAM are known to be coupled when light interacts with…

Statistical ensemble formalism of Kim, Mandel and Wolf (J. Opt. Soc. Am. A 4, 433 (1987)) offers a realistic model for characterizing the effect of stochastic non-image forming optical media on the state of polarization of transmittedlight.…

Optics · Physics 2007-06-26 Sudha , A. V. Gopala Rao , A. R. Usha Devi , A. K. Rajagopal

Orbital angular momentum (OAM) is not a Poincar\'e invariant quantity; so, its value is observer dependent. Notwithstanding that, in quantum chromodynamics, a Poincar\'e-invariant theory, OAM is part of every hadron wave function. Using…

High Energy Physics - Phenomenology · Physics 2026-03-17 Y. -Y. Xiao , Z. -N. Xu , Z. -Q. Yao , C. D. Roberts , J. Rodríguez-Quintero

Ionization of atoms and molecules by absorption of a light pulse results in electron wavepackets carrying information on the atomic or molecular structure as well as on the dynamics of the ionization process. These wavepackets can be…

This study investigates the use of orbital angular momentum (OAM) to enhance phase estimation in Mach-Zehnder interferometers (MZIs) by employing non-Gaussian states as input resources in the presence of noise. Our research demonstrates…

Quantum Physics · Physics 2023-12-05 Yong-Jian Chen , Jin-Wei Gao , Jin-Xuan Han , Zhong-Hui Yuan , Ruo-Qi Li , Yong-Yuan Jiang , Jie Song

A novel technique to measure the orbital angular momentum (OAM) spectrum of the beam obscured by a complex random media is proposed and experimentally demonstrated. This is realized by measuring the complex correlation polarization function…

We demonstrate both theoretically and experimentally beam-dependent photonic spin-orbit coupling in a two-wave mixing process described by an equivalent of the Pauli equation in quantum mechanics. The considered structured light in the…

Applications of the orbital angular momentum (OAM) of light range from the next generation of optical communication systems to optical imaging and optical manipulation of particles. Here we propose a micron-sized semiconductor source which…

The nature of the transverse orbital angular momentum (tOAM) associated with spatiotemporal optical vortex (STOV) pulses has been the subject of recent debate. We demonstrate that the approaches to tOAM presented in several recent papers…

Optics · Physics 2025-09-25 N. Tripathi , S. W. Hancock , H. M. Milchberg

Reaching ultimate performance of quantum technologies requires the use of detection at quantum limits and access to all resources of the underlying physical system. We establish a full quantum analogy between the pair of angular momentum…

Quantum Physics · Physics 2022-01-10 Ladislav Mišta , Hubert de Guise , Jaroslav Řeháček , Zdeněk Hradil

We presented a new method for measuring the squares of the amplitudes and phases of partial vortex-beams in a complex beam array in real time. The method is based on measuring the high-order intensity moments and analyzing the solutions of…

Optics · Physics 2018-12-05 A. Volyar , M. Bretsko , Ya. Akimova , Yu. Egorov