Patent ID: 8228507

Claim:
A quantum entanglement generating system comprising: a laser light source for producing a light beam of light frequency 2 f 0 ; a ring interferometer comprising a beam splitter and a plurality of mirrors, the beam splitter and the minors forming an optical path in the form of a ring; an optical parametric amplifier inserted in the optical path of the ring interferometer for producing a light beam of light frequency f 0 upon receiving a light beam of light frequency 2 f 0 incident into the optical parametric amplifier; and a dispersive medium inserted in the optical path of the ring interferometer, wherein the light beam of light frequency 2 f 0 from the laser light source injects into the beam splitter, the beam splitter splits the light beam of light frequency 2 f 0 into two light beams travelling mutually contrariwise in direction of advance in the ring interferometer, the two light beams injected into the optical parametric amplifier to generate a first and a second squeezed light beams traveling mutually contrariwise in direction of advance in the ring interferometer, the dispersive medium adjusts the relative phase between the first and second squeezed light beams at a selected value, and the beam splitter combines the first and second squeezed light beams, thereby generating quantum entangled beams.