A controllable OAM quantum invisible state transfer system and method based on a W state

The invention discloses a controllable OAM quantum invisible state transfer system based on a W state. the system comprises an Alice sending end and a Bob receiving end. Alice comprises a mixed entanglement unit, an entanglement exchange unit, a Path analysis unit and an SAM analysis unit. the Bob comprises an OAM analysis unit. The Entanglement exchange unit is used for Performing entanglement exchange on the SAM- OAM entangled photon pair, SAM- Path entangled photon pair and SAM-SAM entanglement photon pairs to obtain two W states which are equal in probability and symmetrical to each other,and randomly selecting one W state as a quantum channel; The OAM analysis unit is used for OAM analysis, and Alice can remotely control OAM generation of Bob photons through electric field tuning. The method is an open type target invisible transmission state, an asymmetric light quantum network can be formed, remote control, high-dimensional, expandable and safer quantum invisible transmission state can be realized, and