Patent ID: 7042002

Claim:
An information processing method using a quantum memory in which memory cells are provided, each of the memory cells being formed of a physical system ensemble, the physical system ensemble comprising physical systems configured to have a total angular momentum of magnetic sublevels, quantum information of the physical system ensemble being expressed by a quantum state of whole amount of the total angular momentum of the physical systems, at least one of the memory cells being used as a transfer memory cell A transferring the quantum state, memory cells other than the transfer memory cell A being used as storage memory cells storing the quantum state, and in which a set of two arbitrary memory cells V and B is selected from the storage memory cells and the quantum state of the memory cell V is transferred to the memory cell B, the method comprising: applying a magnetic field to each memory cell and irradiating each memory cell with right-handed or left-handed polarized light to establish an energy state in which the total angular momentum of the entire physical system ensemble forming each memory cell has a particular value; simultaneously irradiating only the two memory cells A and B with one laser beam, detecting a polarization state of the laser beam transmitted through both memory cells, and generating entanglement for the memory cells A and B; and simultaneously irradiating only the two memory cells A and V with one laser beam, detecting a polarization state of the laser beam transmitted through both memory cells, and teleporting the quantum state of the memory cell V to the memory cell B in which the entanglement with the memory cell A has been generated.