Effects of transmission loss on two-mode squeezed vacuum state quantum lidar

Abstract

The performance of two-mode squeezed vacuum state quantum lidar that depends on system transmission losses is studied. The sensitivity and resolution of the system with a certain transmission loss are analyzed by parity detection and maximum transmission model. With a loss coefficient of 0.1 &lt;<!-- k &lt;<!-- 0.5 , the system sensitivity breaks through the standard quantum limit. Taking a single transmission loss into consideration, the maximum transmission losses in the system should be 85% and 94%, corresponding to compression coefficients of ξ = 1.0 and 1.5, respectively. The results show that a high compression degree of the light source method is helpful to enhance the sensitivity of the system, while the system resolution can be further improved by increasing the average photon number.