Single-Photon Entanglement in the keV Regime via Coherent Control of Nuclear Forward Scattering

TL;DR

This paper demonstrates a method to generate entangled single photons in the keV energy range through controlled nuclear forward scattering, enabling potential applications in quantum information with high-energy photons.

Contribution

It introduces a novel technique for creating single-photon entanglement in the keV regime by manipulating nuclear hyperfine fields during coherent scattering.

Findings

Successful generation of entangled keV photons with different polarizations and energies.

Spatial separation of entangled modes achieved using x-ray polarizers and steering mirrors.

Controlled nuclear scattering enables new quantum optics applications at high energies.

Abstract

Generation of single-photon entanglement is discussed in nuclear forward scattering. Using successive switchings of the direction of the nuclear hyperfine magnetic field, the coherent scattering of photons on nuclei is controlled such that two signal pulses are generated out of one initial pump pulse. The two time-resolved correlated signal pulses have different polarizations and energy in the keV regime. Spatial separation of the entangled field modes and extraction of the signal from the background can be achieved with the help of state-of-the-art x-ray polarizers and piezoelectric fast steering mirrors.