Noise-free amplification device and method for improving performance of quantum interferometer

The invention discloses a noiseless amplification method for improving the performance of a quantum interferometer, and the method comprises the following steps: 1, injecting a light source 1 and a light source 2 into a first optical parameter amplifier for beam splitting, and obtaining two beams of light; 2, respectively injecting the two beams of light into noise-free linear amplifiers of respective light paths for amplification; step 3, the signal light in one light beam of the amplified light path passes through a phase shifter, and the phase is changed; step 4, injecting the two beams of light after phase change into a second optical parameter amplifier for beam combination; and step 5, detecting and outputting a quantum state through a photoelectric detector. According to the method, the phase sensitivity of the SU (1, 1) interferometer is further improved by using non-Gaussian operation, so that the interferometer can operate with high performance in a lossy environment, and the precision phase measure