公开(公告)号：JPH11112495A

公开(公告)日：1999-04-23

申请号：JP26941897

申请日：1997-10-02

Applicant: MOTOYOSHI AKIO ,  MATSUOKA MASAHIRO

Inventor： MOTOYOSHI AKIO ,  YAMAGUCHI KOICHI ,  OGURA TETSUYA ,  YONEDA TETSUYA

IPC: H01J33/00 ,  H04B10/25 ,  H04B10/2507 ,  H04B10/70 ,  H04B13/00 ,  H04L9/08 ,  H04L9/38 ,  H04B10/02 ,  H04B10/18

Abstract: PROBLEM TO BE SOLVED: To provide a quantization communication method and its system by which teleportation of quantization bits is realized. SOLUTION: A 1st particle [1] having a quantum condition in response to information to be transmitted, and 2nd and 3rd particles [2], [3] correlated with each other including a tangled state in terms of quantum mechanics are prepared. The 1st particle [1] and the 2nd particle [2] are possessed by a sender and the 3rd particle [3] is possessed by a receiver. The sender and the receiver have in common a state 16 of mixing a quantum condition obtained by a synthesis system of the 2nd and 3rd particles [2], [3] and a quantum condition obtained by a product state between the quantum condition of the 1st particle [1] and its orthogonal state at a prescribed ratio. The measurement result conducted by the sender in the system consisting of the 1st and 2nd particles [1], [2] is sent to the receiver through a classic communication path, and the receiver reproduces the quantum condition lost from the 1st particle [1] by the 3rd particle [3] by measuring the 3rd particle [3] based on the information sent through the classic communication path.

公开(公告)号：JPH11346211A

公开(公告)日：1999-12-14

申请号：JP7885899

申请日：1999-03-24

Applicant: MOTOYOSHI AKIO ,  MATSUOKA MASAHIRO

Inventor： MOTOYOSHI AKIO ,  MATSUOKA MASAHIRO

IPC: H04L9/38 ,  H04B10/00 ,  H04B10/70

Abstract: PROBLEM TO BE SOLVED: To realize the way of thinking of the teleportation of quantum bits by allowing a receiver to reproduce the coefficient of the polarized state of a first photon from the successive measured results of the polarized states of a second photon and a third photon correlatively appearing according to a quantum theory and a transmitted measured result, and to extract information. SOLUTION: A first photon is introduced from an SHG 23 to a block 30, and a second photon is introduced from a PDC 24 to a block 40, and a third photon is transmitted from the PDC 24 through an optical fiber 25 to a block 50 at a receiver side. In this device, a transmitter successively measures the polarized states of the first and second photons appearing at the same time, and transmits the measured result through a classic communication path to a receiver. On the other hand, the receiver reproduces the coefficient of the polarized state of the first photon from the successive measured results of the polarized states of the second photon and a third photon correlatively appearing according to a quantum theory and the transmitted measured result, and extracts information. Thus, quantum cipher communication highly protected from eavesdropping can be attained.