  We consider a continuous-variable quantum teleportation protocol between a
uniformly accelerated sender in the right Rindler wedge, a conformal receiver
restricted to the future light cone, and an inertial observer in the Minkowski
vacuum. Using a non-perturbative quantum circuit model, the accelerated
observer interacts unitarily with the Rindler modes of the field, thereby
accessing entanglement of the vacuum as a resource. We find that a
Rindler-displaced Minkowski vacuum state prepared and teleported by the
accelerated observer appears mixed according to the inertial observer, despite
a reduction of the quadrature variances below classical limits. This is a
surprising result, since the same state transmitted directly from the
accelerated observer appears as a pure coherent state to the inertial observer.
The decoherence of the state is caused by an interplay of opposing effects as
the acceleration increases: the reduction of vacuum noise in the output state
for a stronger entanglement resource, constrained by the amplification of
thermal noise due to the presence of Unruh radiation.
