Entangled microwaves as a resource for entangling spatially separate solid-state qubits: superconducting qubits, NV centers and magnetic molecules

摘要

Quantum correlations present in a broadband two-line squeezed microwave statecan induce entanglement in a spatially separated bipartite system consisting ofeither two single qubits or two qubit ensembles. By using an appropriate masterequation for a bipartite quantum system in contact with two separate butentangled baths, the generating entanglement process in spatially separatedquantum systems is thoroughly characterized. Our results provide evidence thatthis entanglement transfer by dissipation is feasible yielding to asteady-state amount of entanglement in the bipartite quantum system which canbe optimized for a wide range of realistic physical systems that includestate-of-the-art experiments with NV centers in diamond, superconducting qubitsor even magnetic molecules embedded in a crystalline matrix.