Fig. 1. Quantum interference radar system. (a) Principles of system; (b) Mach-Zehnder interferometer

Fig. 2. Absorption efficiency factor of ice crystal particles changes with effective scale

Fig. 3. Elliptical polarization caused by phase delay. (a) Elliptic polarized light detected by the R、T base; (b) polarized light with ellipticity angle ω

Fig. 4. Effect of effective scale of ice crystal particles on quantum bit error rate

Fig. 5. Effect of asymmetric factors of different types of ice crystal particles on quantum bit error rate

Fig. 6. Relationship between transmission distance, effective scale of ice crystal particles and photon energy

Fig. 7. Relationship between particle concentration of ice crystal particles and resolution of quantum radar. (a) N=5; (b) N=10

Fig. 8. Effect of ellipticity angle and polarization contrast on quantum bit error rate. (a) ω=0°-90°; (b) ω=90°-180°