Probing Physics in Vacuum Using an X-ray Free-Electron Laser, a High-Power Laser, and a High-Field Magnet

Inada, T.; Yamazaki, T.; Yamaji, T.; Seino, Y.; Fan, X.; Kamioka, Shusei; Namba, T.; Asai, S.

doi:10.3390/app7070671

Cited by 41 publications

(26 citation statements)

References 47 publications

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“…For further signatures of quantum vacuum nonlinearity in strong electromagnetic fields of focused high-intensity laser pulses, we refer the reader to the pertinent reviews [16,[53][54][55][56][57][58][59] and references therein.…”

Section: Probing Vacuum Birefringence With High-intensity Lasersmentioning

confidence: 99%

High magnetic fields for fundamental physics

et al. 2018

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Various fundamental-physics experiments such as measurement of the birefringence of the vacuum, searches for ultralight dark matter (e.g., axions), and precision spectroscopy of complex systems (including exotic atoms containing antimatter constituents) are enabled by high-field magnets. We give an overview of current and future experiments and discuss the state-of-the-art DCand pulsed-magnet technologies and prospects for future developments. * Electronic address: budker@uni-mainz.de †

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Section: Probing Vacuum Birefringence With High-intensity Lasersmentioning

confidence: 99%

High magnetic fields for fundamental physics

et al. 2018

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“…with the fine-structure-constant α = e 2 / (4π) ≈ 1/137 [5,6,24]. Obviously, the corresponding diagrams are…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The typical spatial and temporal scales characterizing the driving laser beams are much larger than the reduced Compton wavelength C = 1/m e ≈ 3.86 × 10 −13 m and Compton time τ C ≈ 1.29 × 10 −21 s of the electron, respectively. This justifies to use the locally constant field approximation (LCFA) [21,24,30,34] adopted in the second line of Eq. (4) .…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Detectable Optical Signatures of QED Vacuum Nonlinearities Using High-Intensity Laser Fields

Klar

2020

Particles

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Up to date, quantum electrodynamics (QED) is the most precisely tested quantum field theory. Nevertheless, particularly in the high-intensity regime it predicts various phenomena that so far have not directly been accessible in all-optical experiments, such as photon-photon scattering phenomena induced by quantum vacuum fluctuations. Here, we focus on all-optical signatures of quantum vacuum effects accessible in the high-intensity regime of electromagnetic fields. We present an experimental setup giving rise to signal photons distinguishable from the background. This configuration is based on two optical pulsed petawatt lasers: one generates a narrow but high-intensity scattering center to be probed by the other one. We calculate the differential number of signal photons attainable with this field configuration analytically and compare it with the background of the driving laser beams. arXiv:2001.05731v2 [physics.optics]

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“…At leading order the corresponding scattering amplitude is linear in the probe and quadratic in the pump field. A prospective quantum vacuum signature are x-ray probe photons diffracted by a strong optical high-intensity laser pump [13][14][15][16]. X-ray vacuum diffraction is generic to probe photons of arbitrary polarization.…”

Section: Introductionmentioning

confidence: 99%

X-ray vacuum diffraction at finite spatio-temporal offset

Karbstein,

Weernink

2021

Preprint

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We study the nonlinear QED signature of x-ray vacuum diffraction in the head-on collision of optical high-intensity and x-ray free-electron laser pulses at finite spatio-temporal offsets between the laser foci. The high-intensity laser driven scattering of signal photons outside the forward cone of the x-ray probe constitutes a prospective experimental signature of quantum vacuum nonlinearity.Resorting to a simplified phenomenological ad-hoc model, it was recently argued that the angular distribution of the signal in the far-field is sensitive to the wavefront curvature of the probe beam in the interaction region with the high-intensity pump. In this work, we model both the pump and probe fields as pulsed paraxial Gaussian beams and reanalyze this effect from first principles.We focus on vacuum diffraction both as an individual signature of quantum vacuum nonlinearity and as a potential means to improve the signal-to-background-separation in vacuum birefringence experiments.

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Probing Physics in Vacuum Using an X-ray Free-Electron Laser, a High-Power Laser, and a High-Field Magnet

Cited by 41 publications

References 47 publications

High magnetic fields for fundamental physics

High magnetic fields for fundamental physics

Detectable Optical Signatures of QED Vacuum Nonlinearities Using High-Intensity Laser Fields

X-ray vacuum diffraction at finite spatio-temporal offset

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