Multi-Photon Entanglement (IMAGE) University of Bristol Caption Multi-photon entanglement can be used to reveal the multiple parameters that describe optical processes with greater precision than traditional tomography. The authors have demonstrated this using four-photon entanglement to reveal the three parameters that define completely arbitrary polarization rotations with fewer photons and greater precision than previous, shot noise limited, techniques Credit Centre for Quantum Photonics, University of Bristol Usage Restrictions The image is for single-use only and should not be archived License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.