  We propose an efficient light-matter interface at optical frequencies between
a single photon and a superconducting qubit. The desired interface is based on
a hybrid architecture composed of an organic molecule embedded inside an
optical waveguide and electrically coupled to a superconducting qubit placed
near the outside surface of the waveguide. We show that high fidelity,
photon-mediated, entanglement between distant superconducting qubits can be
achieved with incident pulses at the single photon level. Such a low light
level is highly desirable for achieving a coherent optical interface with
superconducting qubit, since it minimizes decoherence arising from the
absorption of light.
