68 research outputs found
Quantum Information Transmission over a Partially Degradable Channel
We investigate a quantum coding for quantum communication over a PD
(partially degradable) degradable quantum channel. For a PD channel, the
degraded environment state can be expressed from the channel output state up to
a degrading map. PD channels can be restricted to the set of optical channels
which allows for the parties to exploit the benefits in experimental quantum
communications. We show that for a PD channel, the partial degradability
property leads to higher quantum data rates in comparison to those of a
degradable channel. The PD property is particular convenient for quantum
communications and allows one to implement the experimental quantum protocols
with higher performance. We define a coding scheme for PD-channels and give the
achievable rates of quantum communication.Comment: 7 pages, 2 figures, Journal-ref: IEEE Acces
Entanglement Availability Differentiation Service for the Quantum Internet
A fundamental concept of the quantum Internet is quantum entanglement. In a
quantum Internet scenario where the legal users of the network have different
priority levels or where a differentiation of entanglement availability between
the users is a necessity, an entanglement availability service is essential.
Here we define the entanglement availability differentiation (EAD) service for
the quantum Internet. In the proposed EAD framework, the differentiation is
either made in the amount of entanglement with respect to the relative entropy
of entanglement associated with the legal users, or in the time domain with
respect to the amount of time that is required to establish a maximally
entangled system between the legal parties. The framework provides an efficient
and easily-implementable solution for the differentiation of entanglement
availability in experimental quantum networking scenarios.Comment: 18 pages, Journal-ref: Scientific Report
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