Browsing Departament: Matemàtiques by Source "Optics Communications 382 (2017) 237–240"
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Linear optics only allows every possible quantum operation for one photon or one port
Elsevier (2017)We study the evolution of the quantum state of n photons in m different modes when they go through a lossless linear optical system. We show that there are quantum evolution operators U that cannot be built with linear ...