No-go theorem for photon bunching suppression via all-unitary linear optics

Details No-go theorem for photon bunching suppression via all-unitary linear optics No-go theorem for photon bunching suppression via all-unitary linear optics

2011-07-23

arxiv.org/abs/1107.4646v2

Physics

Quantum Physics

v1: 3.5 pages, no figures. v2: 4.5 pages. Some corrections and added explanations. Substantially expanded introduction and ref

Scientific paper

We prove that linear optical elements such as phase shifters and beam splitters alone, cannot be used to simultaneously generate arbitrary single-qubit gates on a pair of qubits realized as single-photon optical modes, and at the same time prevent coupling to the subspace of states of two photons per mode. This constitutes a no-go theorem for photon bunching suppression via all-unitary linear optics.

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