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The squeezing spectrum of the fluorescence field emitted from a four-level atom in $J=1/2$ to $J=1/2$ configuration driven by two coherent fields is studied. We find that the squeezing properties of the fluorescence radiation are…

量子物理 · 物理学 2020-02-19 H. B. Crispin , R. Arun

We calculate the cross section and transverse-momentum ($P_{\bot}$) distribution of the Breit-Wheeler process in relativistic heavy-ion collisions and their dependence on collision impact parameter ($b$). To accomplish this, the Equivalent…

核理论 · 物理学 2020-09-09 Wangmei Zha , James Daniel Brandenburg , Zebo Tang , Zhangbu Xu

The influence of potential well width on electron-positron pair production has been examined through theoretical and numerical approaches by employing the computational quantum field theory. Quantum interference effects in pair production…

高能物理 - 唯象学 · 物理学 2024-02-02 Adiljan Sawut , Ying-Jun Li , Miao Jiang , Bai-Song Xie

Electron-positron pair creation in collisions of a modulated laser pulse with a high-energy photon (nonlinear Breit-Wheeler process) is studied by means of strong-field quantum electrodynamics. It is shown that the driving pulse modulations…

高能物理 - 唯象学 · 物理学 2015-06-22 K. Krajewska , J. Z. Kamiński

Quantum harmonic oscillators model a wide variety of phenomena ranging from electromagnetic fields to vibrations of atoms in molecules. Their excitations can be represented by bosons such as photons, single particles of light, or phonons,…

Generation of mechanical squeezing has attracted a lot of interest for its nonclassical properties, applications in quantum information, and high-sensitivity measurement. Here we propose a detuning-switched method that can rapidly generate…

量子物理 · 物理学 2023-03-21 Yaohua Li , An-Ning Xu , Long-Gang Huang , Yong-Chun Liu

We study theoretically the nonlinear optical properties of a semiconductor quantum well (QW) irradiated by a two-mode electromagnetic wave consisting of a strong resonant dressing field and a weak off-resonant driving field. In the…

介观与纳米尺度物理 · 物理学 2018-04-30 S. Mandal , T. C. H. Liew , O. V. Kibis

We investigate the electron-positron pair production process in an oscillating field with modulated amplitude in quantum kinetic formalism. By comparing the number density in field with and without modulation, we find that the pair…

量子物理 · 物理学 2019-05-07 Ibrahim Sitiwaldi , Bai-Song Xie

When an electron is accelerated, it emits radiation. In the relativistic quantum realm the elementary radiation process is the emission of a single photon, a process known as nonlinear Compton scattering in the case of an electron moving in…

量子物理 · 物理学 2026-05-06 Antonino Di Piazza , Kenan Qu

Time-domain analysis of harmonic fields with sub-cycle resolution is now experimentally viable due to the emergence of sensitive, on-chip techniques for petahertz-scale optical-field sampling. We demonstrate how such a time-domain,…

Observing few-photon optomechanical effects remains a significant challenge in optomechanical systems. To investigate intrinsic radiation-pressure-induced nonlinear effects in the few-photon regime, it is essential to strengthen the…

量子物理 · 物理学 2026-03-10 Cheng Shang , H. Z. Shen

This study focuses on generating and manipulating squeezed states with two external oscillators coupled by an InP HEMT transistor operating at cryogenic temperatures. First, the small-signal nonlinear model of the transistor at high…

量子物理 · 物理学 2022-04-19 Ahmad Salmanogli

Direct production of electron--positron pairs in two photon collisions, the Breit--Wheeler process, is one of the basic processes in the Universe. However, it has never been observed in laboratory because of absence of the intense gamma-ray…

仪器与探测器 · 物理学 2016-01-13 X. Ribeyre , M. Lobet , E. D'Humières , O. Jansen , S. Jequier , V. T. Tikhonchuk

Deep understanding of photon polarization impact on pair production is essential for the efficient creation of laser driven polarized positron beams, and demands a complete description of polarization effects in strong-field QED processes.…

Above-threshold ionization (ATI) is a strong-field-driven process where electrons absorb more photons than required for ionization. While ATI dynamics and outputs are well-understood when driven by classical, perfectly coherent light, the…

量子物理 · 物理学 2025-08-14 J. Rivera-Dean , P. Stammer , C. Figueira de Morisson Faria , M. Lewenstein

We study the emergence of non-Gaussian quantum features in pulsed squeezed light generation with a mesoscopic number (i.e., dozens to hundreds) of pump photons. Due to the strong optical nonlinearities necessarily involved in this regime,…

In atomically thin semiconductors based on transition metal dichalcogenides, photoexcitation can be used to generate high densities of electron-hole pairs. Due to optical nonlinearities, which originate from Pauli blocking and many-body…

介观与纳米尺度物理 · 物理学 2020-12-15 Daniel Erben , Alexander Steinhoff , Michael Lorke , Frank Jahnke

A study of the Mode-locking lasing pulse formation in closed cavities is presented within a statistical mechanical framework where the onset of laser coincides with a thermodynamic phase transition driven by the optical power pumped into…

光学 · 物理学 2015-04-24 Fabrizio Antenucci , M. Ibáñez Berganza , Luca Leuzzi

Ultra-relativistic heavy-ion collisions are expected to produce the strongest electromagnetic fields in the known Universe. These highly-Lorentz contracted fields can manifest themselves as linearly polarized quasi-real photons that can…

高能物理 - 唯象学 · 物理学 2021-11-17 James Daniel Brandenburg , Wangmei Zha , Zhangbu Xu

The strong-field induced generation of nonclassical states of light is not only a subject of fundamental research but also has potential usage in quantum information science and technology. The emerging field of strong-field quantum optics…

量子物理 · 物理学 2025-03-21 Christian Saugbjerg Lange , Thomas Hansen , Lars Bojer Madsen