Implementation of a Distributed Coherent Quantum Observer
For quantum control researchers, this work provides a feasible experimental design for a previously theoretical quantum observer, though it is an incremental step.
The paper proposes an experimental implementation of a distributed coherent quantum observer using a non-degenerate parametric amplifier and coupled optical cavities, demonstrating convergence to consensus in a time-averaged sense.
This paper considers the problem of implementing a previously proposed distributed direct coupling quantum observer for a closed linear quantum system. By modifying the form of the previously proposed observer, the paper proposes a possible experimental implementation of the observer plant system using a non-degenerate parametric amplifier and a chain of optical cavities which are coupled together via optical interconnections. It is shown that the distributed observer converges to a consensus in a time averaged sense in which an output of each element of the observer estimates the specified output of the quantum plant.