Quantum metrology with X-rays

by Prof. Sharon Shwartz (Physics Department and Institute of Nanotechnology, Bar Ilan University, Israel)

Tuesday 30 May 2023, 13:00 → 14:00 Europe/Berlin

XHQ / E1.173 (EuXFEL, Schenefeld)

Quantum optics has been very fruitful and led to many seminal achievements in fostering quantum technologies in a variety of fields including imaging and spectroscopy [1]. However, the focus of quantum optics is on the optical range of the electromagnetic spectrum. The extension of concepts of quantum optics into the x-ray range can lead to remarkable applications with enhanced performances with respect to the present methodologies that are used in x-rays science and technology [2]. Recently, the properties of the strong time-energy correlations of photons produced by the process of spontaneous parametric down conversion (SPDC) have been extended to the x-ray regime to demonstrate the ability to improve the visibility and the SNR of an image with a small number of photons in an environment with a noise level that is higher than the signal by many orders of magnitude [3]. Another quantum imaging modality called ghost imaging has been reported as well [4]. More recently, the observation of the interaction of a single photon with a beam splitter has been observed [5] and extension of other quantum effects such as the Hong-Ou-Mandel effect to sub-attosecond sub-Angstrom optical path metrology with x-rays has been proposed [6]. In my talk I will review the recent progress toward quantum x-ray metrology and discuss the potential advantages of using quantum technologies for x-ray sensing. [1] S. Mukamel et al. “Roadmap on quantum light spectroscopy”, J. Phys. B: At. Mol. Opt. Phys. 53, 072002 (2020) [2] R. Röhlsberger, J. Evers, and S. Shwartz, Quantum and nonlinear optics with hard x-rays, in Synchrotron Light Sources and Free-Electron Lasers: Accelerator Physics, Instrumentation and Science Applications, edited by E. J. Jaeschke, S. Khan, J.R. Schneider, and J.B. Hastings (Springer International Publishing Cham 2020), pp. 1399– 1431, https://doi.org/10.1007/978-3-030-23201- 6_32. [3] S. Sofer, E. Strizhevsky, A. Schori, K. Tamasaku, and S. Shwartz, “Quantum enhanced x-ray detection”, Physical Review X, 9, 031033 (2019). [4] A. Schori et al. “Ghost imaging with paired x-ray photons”, Physical Review A ,97 , 063804 (2018). [5] E. Strizhevsky et al. "Efficient Interaction of Heralded X-Ray Photons with a Beam Splitter ” Physical Review Letters 127, 013603 (2021). [6] S. Volkovich and S. Shwartz "Subattosecond x-ray Hong–Ou–Mandel metrology”, Optics Letters 45, 2728 (2020)

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