High precious automatic balanced homodyne detector for quantum information processing based on proportional-integral-derivative

Abstract

Balance homodyne detector plays an important role in quantum information processing, which is used to achieve high precision quantum measurement. In the actual measurement, the symmetry of the two arms of the detector will become worse due to the influence of objective factors such as environment and temperature, which will lead to the performance decline and the wrong quantum information. In this paper, a high precious automatic balanced homodyne detector based on Proportional-Integral-Derivative is proposed, in order to realize the automatic balancing of the detector, which can improve the common mode rejection ratio of 22.4 dB, so as to complete the stable and high precision quantum information processing.