Ideal Quantum Teleamplification up to a Selected Energy Cutoff Using Linear Optics

We introduce a linear optical technique that can implement ideal quantum teleamplification up to the nh Fock state, where ncan be any positive integer. Here teleamplification consists of both quantum teleportation and noiseless linear amplification (NLA). This simple protocol consists of a beam splitter and an (n+1 splitter, with nancillary photons and detection of nphotons. For a given target fidelity, our technique improves...