Real-Time Imaging of Quantum Entanglement

TL;DR

This paper demonstrates real-time imaging of quantum entanglement using advanced ICCD cameras, enabling direct visualization of entanglement effects and enhancing understanding and applications in quantum optics.

Contribution

It introduces the use of triggered ICCD cameras for real-time imaging of photonic entanglement, allowing direct observation and flexible creation of spatial-mode entanglement.

Findings

Successful real-time imaging of entanglement effects

Quantitative verification of non-classicality through photon counting

Flexible creation of various spatial-mode entanglements

Abstract

Quantum Entanglement is widely regarded as one of the most prominent features of quantum mechanics and quantum information science. Although, photonic entanglement is routinely studied in many experiments nowadays, its signature has been out of the grasp for real-time imaging. Here we show that modern technology, namely triggered intensified charge coupled device (ICCD) cameras are fast and sensitive enough to image in real-time the effect of the measurement of one photon on its entangled partner. To quantitatively verify the non-classicality of the measurements we determine the detected photon number and error margin from the registered intensity image within a certain region. Additionally, the use of the ICCD camera allows us to demonstrate the high flexibility of the setup in creating any desired spatial-mode entanglement, which suggests as well that visual imaging in quantum optics not only provides a better intuitive understanding of entanglement but will improve applications of quantum science.