Probing the Quantum and Classical Boundary: A Tabletop Experiment Using Quantum Optics

In this work, we propose a simple but effective experiment for probing the boundary in which a wave-function collapses. Using a quantum optics system interacting with a photomultiplier tube (PMT), one is able to determine the number of electrons needed to interfere with the “which-path” information to cause the collapse of a quantum state.