QUANTUM ENTANGLEMENT GENERATION METHOD, QUANTUM ENTANGLEMENT GENERATION SYSTEM, QUANTUM COMMUNICATION APPARATUS, QUANTUM COMMUNICATION SYSTEM, AND PROJECTION MEASUREMENT METHOD

摘要

PROBLEM TO BE SOLVED: To provide a quantum entanglement generation method capable of easily adjusting an optical path length and capable of easily controlling the entering timing light quantum into a Bell analyzer.;SOLUTION: The quantum entanglement generation method uses an item constituting an asymmetric five-level lambda system including: a ground state; two degenerate metastable states; and two degenerated excited states. The item constituting an asymmetric five-level lambda system is excited from the ground state. When a Raman transition has occurred to transit to one metastable state in the two metastable state, the generated Stokes photon becomes one polarization state. When the raman transition has occurred to the other metastable state, the generated Stokes photon is in the other polarization state.;SELECTED DRAWING: Figure 3;COPYRIGHT: (C)2017,JPO&INPIT