Communication with Unreliable Entanglement Assistance
- URL: http://arxiv.org/abs/2112.09227v3
- Date: Mon, 9 May 2022 10:41:12 GMT
- Title: Communication with Unreliable Entanglement Assistance
- Authors: Uzi Pereg, Christian Deppe, and Holger Boche
- Abstract summary: Entanglement resources can increase transmission rates substantially.
In order to generate entanglement for optical communication, the transmitter first prepares an entangled photon pair locally.
Without feedback, the transmitter does not know whether the entangled photon has reached the receiver.
- Score: 78.7611537027573
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Entanglement resources can increase transmission rates substantially.
Unfortunately, entanglement is a fragile resource that is quickly degraded by
decoherence effects. In order to generate entanglement for optical
communication, the transmitter first prepares an entangled photon pair locally,
and then transmits one of the photons to the receiver through an optical fiber
or free space. Without feedback, the transmitter does not know whether the
entangled photon has reached the receiver. The present work introduces a new
model of unreliable entanglement assistance, whereby the communication system
operates whether entanglement assistance is present or not. While the sender is
ignorant, the receiver knows whether the entanglement generation was
successful. In the case of a failure, the receiver decodes less information. In
this manner, the effective transmission rate is adapted according to the
assistance status. Regularized formulas are derived for the classical and
quantum capacity regions with unreliable entanglement assistance,
characterizing the tradeoff between the unassisted rate and the excess rate
that can be obtained from entanglement assistance.
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