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Improving the image contrast of objects immersed in weakly scattering media can be achieved using various strategies. One common approach is to reject events associated with scattered photons in favor of the detection of ballistic photons.…

We model and investigate the collective nonlinear optical response of an ensemble of two-level emitters that are weakly coupled to a single-mode waveguide. Our approach generalizes the insight that photon-photon correlations in the light…

We report the observation of a bunching of ~3 photon states, which is a coherent superposition of emitted photons and resonantly scattered laser photons, arising upon excitation by even-$\pi$ pulses of a two-level system represented by a…

Mesoscale and Nanoscale Physics · Physics 2025-07-09 I. V. Krainov , A. I. Galimov , M. V. Rakhlin , A. A. Toropov , T. V. Shubina

A hallmark of integrable systems is the purely elastic scattering of their excitations. Such systems possess an extensive number of locally conserved charges, leading to the conservation of the number of scattered excitations, as well as…

Quantum Physics · Physics 2024-05-01 Amir Burshtein , Moshe Goldstein

We provide a complete and exact quantum description of coherent light scattering in a one-dimensional multi-mode transmission line coupled to a two-level emitter. Using recently developed scattering approach we discuss transmission…

Quantum Physics · Physics 2015-07-07 Mikhail Pletyukhov , Vladimir Gritsev

The elastic scattering of two real photons in vacuum is one of the most elusive of the fundamentally new processes predicted by quantum electrodynamics. This explains why, although it was first predicted more than eighty years ago, it has…

High Energy Physics - Phenomenology · Physics 2021-12-08 Maitreyi Sangal , Christoph H. Keitel , Matteo Tamburini

The effects of two-photon exchange corrections, suggested to explain the difference between measurements of the proton elastic electromagnetic form factors using the polarization transfer and Rosenbluth techniques, have been studied in…

Nuclear Experiment · Physics 2014-11-18 V. Tvaskis , J. Arrington , M. E. Christy , R. Ent , C. E. Keppel , Y. Liang , G. Vittorini

The propagation of transverse spatial correlations of photon pairs through arbitrary first-order linear optical systems is studied experimentally and theoretically using the fractional Fourier transform. Highly-correlated photon pairs in an…

Quantum Physics · Physics 2009-11-13 D. S. Tasca , S. P. Walborn , F. Toscano , P. Pellat-Finet , P. H. Souto Ribeiro

Coherent backscattering is a coherence effect in the propagation of waves through disordered media involving two or more scattering events. Here, we report on the observation of coherent backscattering from individual atoms and their mirror…

In this paper we study photon emission in the interaction of the laser beam with an under-dense target and the attached reflecting plasma mirror. Photons are emitted due to the inverse Compton scattering when accelerated electrons interact…

Plasma Physics · Physics 2020-07-17 M. Jirka , O. Klimo , Y. J. Gu , S. Weber

We report direct observation of the development of long-range spatial intensity correlations and the growth of intensity fluctuations inside the random media. We fabricated quasi-two-dimensional disordered photonic structures and probed the…

Optics · Physics 2015-06-19 Raktim Sarma , Alexey Yamilov , Pauf Neupane , Boris Shapiro , Hui Cao

Entangled photons exhibit non-classical light-matter interactions that create new opportunities in materials and molecular science. For example, in entangled two-photon absorption, the intensity-dependence scales linearly as if only one…

Optics · Physics 2020-05-15 Szilard Szoke , Hanzhe Liu , Bryce P. Hickam , Manni He , Scott K. Cushing

The nonlinear photon-photon interaction mediated by a single two-level atom is studied theoretically based on a one-dimensional model of the field-atom interaction. This model allows us to determine the effects of an atomic nonlinearity on…

Quantum Physics · Physics 2009-11-10 Kunihiro Kojima , Holger F. Hofmann , Shigeki Takeuchi , Keiji Sasaki

We study coherent backscattering of a quasi-monochromatic laser by a dilute gas of cold two-level atoms. We consider the perturbative regime of weak intensities, where nonlinear effects arise from {\em inelastic} two-photon scattering…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 T. Wellens , B. Gremaud , D. Delande , C. Miniatura

We report the enhancement of quantum correlations for biphotons generated via spontaneous four-wave mixing in an ensemble of cold two-level atoms. This enhancement is based on the filtering of the Rayleigh linear component of the spectrum…

Quantum Physics · Physics 2024-11-01 Lucas S. Marinho , Michelle O. Araújo , Wellington Martins , Daniel Felinto

The single-photon scattering in a rectangular waveguide by a V-type three-level emitter is studied for large range of input-photon energy beyond the single-mode region. By using Lippmann-Schwinger formalism, the necessary and sufficient…

Quantum Physics · Physics 2020-12-30 Ya-Ju Song , Lei Qiao , Chang-Pu Sun

Double-slits provide incoming photons with a choice. Those that survive the passage have chosen from two possible paths which interfere to distribute them in a wave-like manner. Such wave-particle duality continues to be challenged and…

Optics · Physics 2013-01-30 B. King , A. Di Piazza , C. H. Keitel

Two electron interference experiments which are far from each other are considered. They are irradiated with correlated nonclassical electromagnetic fields, produced by the same source. The phase factors are in this case operators, and…

Quantum Physics · Physics 2009-11-10 D. I. Tsomokos , C. C. Chong , A. Vourdas

Advancing quantum information, communication and sensing relies on the generation and control of quantum correlations in complementary degrees of freedom. Here, we demonstrate the preparation of electron-photon pair states using the…

It is commonly believed that photon polarisation entanglement can only be obtained via pair creation within the same source or via postselective measurements on photons that overlapped within their coherence time inside a linear optics…

Quantum Physics · Physics 2009-11-10 Yuan Liang Lim , Almut Beige