Photon-number resolving detection techniques are reviewed including the principle and its technical requirements,the technical achievement and its trends of development. Three kinds of photon-number resolving detection in development are analyzed:Superconducting transition-edge sensor,charge-integration photon detector and delayed single photon probability mapping based on Avalanche Photodiode. The performance on photon number resolving and the sources of error counts are discussed.
重点分析了目前能达到单光子分辨的发展中的三种探测技术:越界超导传感技术(superconducting transition-edge sensor),电荷积分单光子探测技术(charge integration photon detection)和雪崩光电二极管单光子分布探测技术(delayed single photon probability mappingbased on avalanche photodiode),讨论了探测器的光子数分辨能力及其噪音来源.
(2) The effects on the quantum statistical properties of the two-mode SU(1,1) coherent field induced by the intrinsic decoherence, the two-mode photon numberand the mean photon number are analyzed.
The comparison between these and the corresponding ones of the singlephoton laser (S) and the two-photon laser (Ⅱ)with two-photon loss mechanism,shows that,the average photon number in the steady state is by far higher of Ⅰ and Ⅱ than of S, the inversions for all atoms of S, Ⅰ and Ⅱ increase remarkably successively,and so do the line-widths of Ⅰ ,S and Ⅱ.
Photonic crystal, a novel and artificial photonic material with periodic dielectric distribution, possesses photonic bandgap and can control the propagation states of photons.
For ensuring the safety of QSDC with single photons and quantum information sharing of single qubit in a noisy channel, a quantum privacy amplification protocol has been proposed.
The method is based on the principles of quantum electrodynamics that make it possible to compute probability amplitudes of hitting the receiver by photons emitted by the source.