Multi-pair two-component quantum entangled state micro-ring resonant cavity and preparation method thereof

The invention provides a multi-pair two-component quantum entangled state micro-ring resonant cavity and a preparation method thereof. The micro-ring resonant cavity is composed of a coupling channel and a micro-ring, and the micro-ring is a micro-ring with a third-order nonlinear effect; and continuous light is used for pumping the micro-ring resonant cavity, pumping light enters the coupling channel from an input port provided by the coupling channel, part of the pumping light in the coupling channel is coupled into the micro-ring, multiple pairs of signal light and idle light are generated after interaction, and the generated multiple pairs of signal light and idle light meet the entanglement relation. The micro-ring resonant cavity disclosed by the invention can be made of a Si3N4 material with relatively high nonlinear coefficient, high integration level and stable performance. Simulation is carried out on the multi-pair double-component quantum entangled state preparation method provided by the inventio