Continuous-variable quantum teleportation with vacuum-entangled Rindler modes

• URL: http://arxiv.org/abs/2001.03387v4
• Date: Mon, 9 Jan 2023 22:50:25 GMT
• Title: Continuous-variable quantum teleportation with vacuum-entangled Rindler modes
• Authors: Joshua Foo and Timothy C. Ralph
• Abstract summary: We consider a continuous-variable quantum teleportation protocol between a uniformly accelerated sender in the right Rindler wedge and an inertial observer in the Minkowski vacuum. We find that a Rindler-displaced Minkowski vacuum state prepared and teleported by the accelerated observer appears mixed according to the inertial observer.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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