Laser Detection Of Gravitational Waves Is Questioned

The laser interferometer gravitational wave observatory (LIGO) announced that the third detection of gravitational waves was not more than one month. Recently, the United States “Wired” magazine reported that several independent physicists had laser The laser pointer data raises questions. Danish physicist Andrew Jackson and four others jointly wrote to Quantum Magazine that after detailed analysis of the gravitational wave observation data at that time, they found unexplained associated noise, which means that the possibility of detection at the time It is not really a gravitational wave signal, but a louder noise.

5000mW Laser Pointer 5W 532nm Green Star

Although some members of the LIGO Scientific Cooperative Association publicly refuted the doubt, thinking that the noise conclusion may be caused by code errors, but because the laser interferometer laser will produce quantum effects, quantum noise will seriously interfere with the sensitivity of gravitational wave detection. Therefore, only by increasing sensitivity, these doubts will disappear. LIGO interferometers in Livingston (left) and Hanford (right) on the northwest coast of the United States respectively.

In order to reduce quantum noise, the LIGO project team continuously tested its new technology in the German GEO600 detector, using the advances in the field of optoelectronics to compress the red laser pointer and increase the sensitivity of the LIGO detector by 50%. Although some quantum physicists have not participated in the detection of gravitational waves, they have continuously put forward innovative ideas to improve the sensitivity of gravitational wave detection. Just this week, “Nature” magazine published a new technology and theory proposed by Danish scientists. It can double the sensitivity of the gravitational wave detector.