Communication with a demountable quantum bus part 2: Entanglement via reservoir engineering*

Most quantum communication implementations rely on exchanging photonic states across a network and suffer from photon loss in the links coupling the modules. Surprisingly, if the communication channel can be treated as a single lossy stationary mode, reservoir engineering can be used for entanglement generation. We report on an experiment that demonstrates this approach by symmetrically coupling two modules to a coaxial cable acting as a shared reservoir. This allows us to engineer an effective non-local dissipation on two bosonic qubits housed in separable 3D cavity modules that can be used for entanglement generation. Combining this with additional local stabilization of the qubit manifolds enables us to deterministically generate a Bell pair.