Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1859481 | Physics Letters A | 2016 | 8 Pages |
•Deterministic linear optics mediated superdense coding is proposed.•Two degrees of freedom, polarization and spatial, are used.•Heralded source of conditioned entangled photon pairs, 92% efficient, is proposed.
We present a scheme of deterministic mediated superdense coding of entangled photon states employing only linear-optics elements. Ideally, we are able to deterministically transfer four messages by manipulating just one of the photons. Two degrees of freedom, polarization and spatial, are used. A new kind of source of heralded down-converted photon pairs conditioned on detection of another pair with an efficiency of 92% is proposed. Realistic probabilistic experimental verification of the scheme with such a source of preselected pairs is feasible with today's technology. We obtain the channel capacity of 1.78 bits for a full-fledged implementation.