Joining the quantum state of two photons into one
Chiara Vitelli, Nicolò Spagnolo, Fabio Sciarrino, Enrico Santamato, Lorenzo Marrucci · Research in Optical Sciences · 2014
We introduce and demonstrate experimentally a physical process, named quantum joining, in which the two-dimensional quantum states (qubits) of two input photons are combined into a single output photon, within a four-dimensional Hilbert space.