Genuine quantum networks: superposed tasks and addressing
- URL: http://arxiv.org/abs/2005.00020v1
- Date: Thu, 30 Apr 2020 18:00:06 GMT
- Title: Genuine quantum networks: superposed tasks and addressing
- Authors: Jorge Miguel-Ramiro, Alexander Pirker and Wolfgang D\"ur
- Abstract summary: We show how to make quantum networks, both standard and entanglement-based, genuine quantum.
We provide them with the possibility of handling superposed tasks and superposed addressing.
- Score: 68.8204255655161
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We show how to make quantum networks, both standard and entanglement-based,
genuine quantum by providing them with the possibility of handling superposed
tasks and superposed addressing. This extension of their functionality relies
on a quantum control register, which specifies not only the task of the
network, but also the corresponding weights in a coherently superposed fashion.
Although adding coherent control to classical tasks, such as sending or
measuring -or not doing so-, is in general impossible, we introduce protocols
that are able to mimick this behavior under certain conditions. We achieve this
by always performing the classical task, either on the desired state or a
properly chosen dummy state. We provide several examples, and show that
externally controlling quantum superposition of tasks offers new possibilities
and advantages over usually considered single functionality. For instance,
superpositions of different target state configurations shared among different
nodes of the network can be prepared, or quantum information can be sent among
a superposition of different paths or to different destinations.
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