  Quantum communication protocols based on nonclassical correlations can be
more efficient than known classical methods and offer intrinsic security over
direct state transfer. In particular, remote state preparation aims at the
creation of a desired and known quantum state at a remote location using
classical communication and quantum entanglement. We present an experimental
realization of deterministic continuous-variable remote state preparation in
the microwave regime over a distance of 35 cm. By employing propagating
two-mode squeezed microwave states and feedforward, we achieve the remote
preparation of squeezed states with up to 1.6 dB of squeezing below the vacuum
level. We quantify security in our implementation using the concept of the
one-time pad. Our results represent a significant step towards microwave
quantum networks between superconducting circuits.
