Towards Quantum Sensor Networks

Quantum sensor networks are a framework for distributed quantum sensing. In particular, they aim at characterizing protocols for sensing where each of the parties have access to a local parameter, and in particular, to a local channel that encodes this parameter over their quantum resources. In this project we start by investigating the privacy in such protocols, where only the information about a target linear function of the local parameters is available to every party.

As a result we find a complete description of the states that hold this property, in terms of the target function, and the resource distribution. Using these results, we then proceed to find a set of problems that can be described by a linear function of local values, which now can be seen as evaluations of a field in the different locations.

Using this we find go and non-go results under which this problem converges to the correct solution, and if not, ways to find the corresponding error. This will be related with the locations of the sensors and the model of the field available. Both works pave a path towards the deployment of a quantum sensor network.