Squeezed light is a key tool for the development of quantum computers based on light. It is a quantum state of light which exhibits less phase noise than a laser at the expense of more noise in the amplitude to fulfill Heisenberg's uncertainty relation. It is generated by nonlinear processes in a crystal embedded into a light resonator.
In the Center for Macroscopic Quantum States, bigQ, (www.bigq.dk
), we developed a compact squeezed light source which fits onto 2 A4 sheets of paper. To further improve the source the project aims at investigating several schemes for keeping the resonator on resonance to replace the existing one. One of the schemes to be investigated employs a maximum search algorithm on the transmitted light power which can be implemented on an Arduino-type microcontroller.