Seminarium "Teoria cząstek elementarnych i kosmologia"

Recently, there has been a lot of attention and studies on treating high-energy colliders as natural quantum processors. Along these lines, we propose a novel test of quantum mechanics which goes beyond the Bell-inequality test. Our proposal is based on the Quantum Process Tomography, i.e. an experimental reconstruction of the entire quantum channel. We demonstrate such a test can be implemented with the e+ e- > t tbar process at lepton colliders with multiple runs of different beam polarisation settings. We also discuss the possibilities of Quantum Process Tomography with different collider processes.