X-Ray Parametric Down-Conversion in the Langevin Regime
Abstract
We experimentally and theoretically study the coincidence count rate for down-converted x-ray photons. Because of photoionization, parametric down-conversion at x-ray wavelengths generally involves loss and the theoretical description requires a Langevin approach. By working in a transmission geometry (Laue) rather than in the Bragg geometry of previous experiments, we obtain an improvement in the signal-to-noise ratio of 12.5, and find agreement between experiment and theory.
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Parametric down conversion, which generates entangled photon pairs in the hard x-ray regime, has been demonstrated recently with XFELs.
“Parametric down conversion (PDC), which generates entangled photon pairs in the hard x-rayregime [49,50], has been demonstrated recently with XFELs [51].”
From Roadmap of ultrafast x-ray atomic and molecular physics (2018) · cites this paper as [51]
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References 21 · Cited by 96
- Authors
- Shwartz, S., Coffee, R. N., Feldkamp, J. M., Feng, Y., Hastings, J. B., Yin, G. Y., & Harris, S. E.
- Affiliations
- Stanford University (US)
- SLAC National Accelerator Laboratory (US)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2012-07-06
- Volume
- 109
- Issue
- 1
- Pages
- 013602-013602
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2312893842
- Cited by
- 96
- References
- 21
- Citations by year
- 2026: 2 · 2025: 11 · 2024: 5 · 2023: 6 · 2022: 11 · 2021: 8 · 2020: 5 · 2019: 9 · 2018: 10 · 2017: 10 · 2016: 6 · 2015: 5 · 2014: 4 · 2013: 3 · 2012: 1
- FWCI
- 4.09
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
- Funders
- U.S. Department of Energy
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Photorefractive and Nonlinear Optics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
- Keywords
- Langevin theory, coincidence count rate, photoionization, signal-to-noise ratio, nonlinear optics
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