Patent ID: 6849863
Filing Date: 2005-02-01
Classification: B82Y,G06N

Abstract:
1. A quantum memory comprising: a memory cell section of a plurality of memory cells, each of the plurality of the memory cells comprising a physical system ensemble, the physical system ensemble comprising physical systems configured to have a total angular momentum of magnetic sublevels, the physical system ensemble being configured to have quantum information expressed by a quantum state of whole amount of the total angular momentum of magnetic sublevels, the plurality of memory cells comprising two storage memory cells storing the quantum state and a transfer memory cell transferring the quantum state, and substantially strait line units each extending from an edge to another edge of the memory cell section and each consisting of one of the two storage memory cells and the transfer memory cell; a magnet configured to apply a magnetic field to the two storage memory cells and the transfer memory cell; a first light source configured to irradiate the two storage memory cells and the transfer memory cell with right-handed or left-handed polarized light; a second light source configured to simultaneously irradiate the storage memory cell and the transfer memory cell of one of the substantially strait line units with a laser beam; and a detector configured to detect a polarization state of the laser beam.