The solution of the time-dependent Fokker-Planck equation of non-degenerate optical parametric amplification and its application to the optimum realization of EPR paradox

In this paper, the solution of the time-dependent Fokker-Planck equation of non-degenerate optical parametric amplification is used to deduce the condition demonstrating the Einstein-Podolsky-Rosen （EPR） paradox. The analytics and numerical calculation show the influence of pump depletion on the error in the measurement of continuous variables. The optimum realization of EPR paradox can be achieved by adjusting the parameter of squeezing. This result is of practical importance when the realistic experimental conditions are taken into consideration .

Quantum Encryption Protocol Based on Continuous Variable EPR Correlations

A quantum encryption protocol based on Gaussian-modulated continuous variable EPR correlations is proposed. The security is guaranteed by continuous variable EPR entanglement correlations produced by nondegenerate optical parametric amplifier （NOPA）. For general beam splitter eavesdropping strategy, the mutual information I（α, ε） between Alice and Eve is caJculated by employing Shannon information theory. Finally the security analysis is presented.

大豆根瘤菌效应因子NopA的突变对共生结瘤的影响

[目的]为了探究根瘤菌Ⅲ型效应因子在大豆-根瘤菌共生体系形成过程中作用。[方法]通过三亲杂交的方法进行根瘤菌NopA突变体的构建,并利用PCR和qRT-PCR对突变体进行验证。在染料木苷诱导情况下,纯化根瘤菌胞外蛋白,利用Ⅲ型效应因子NopL及NopT的抗体对纯化蛋白进行检测。将野生型菌株HH103和NopA突变体共同接种大豆,测定NopA突变对根瘤菌结瘤能力的影响。[结果]根瘤菌效应因子NopA突变能够抑制NopL和NopT的分泌。结瘤能力鉴定表明,NopA突变能够显著降低东农50大豆植株根瘤数和根瘤干重,根瘤数由每株31.9下降到21.6,根瘤干重由每株33.9 mg下降到20.5 mg。共生结瘤Marker基因表达量分析表明,在根瘤菌侵染过程中,NopA能够促进GmPR1和PR5的表达。[结论]证明了根瘤菌Ⅲ型效应因子NopA能够影响其他Ⅲ型效应因子的分泌,并且能够正调控大豆-根瘤菌共生结瘤。