Abstract

I will discuss various methods via which the transmission characteristics of optical quantum channels can be enhanced via the manipulation of continuous variables of the optical system. These methods will range from simple post-selection protocols through to quantum repeaters. In the most general cases the channel is improved with respect to the transmission of arbitrary quantum states - i.e. the quantum information encoding protocol; discrete, continuous or hybrid, is unrestricted. As well as theoretical results I will discuss new experimental demonstrations.

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