π共役分子およびその複合体におけるコヒーレントな光と物質の相互作用

张学典, 颜泽帆, 焦加洁 +1 more

分别采用0/π和±π/2相移的方式对光脉冲信号进行了编码,并比较了基于超结构光纤光栅的0/π和±π/2两种相移编码方式的安全性,通过研究分析两编码器所生成的编码波形来评估各自的安全性。结果表明,0/π相移编码器生成的编码波形中存在明显的凹陷,光学码信息易被窃取,安全性低;而±π/2相移编码器生成的编码波形能隐秘地将光学码信息隐藏于编码波形中,大幅改善了编码安全性,提高了通信安全。

道男 池沢, 泰章 舛本

Miroslav Gavenda, Antonín Černoch, Jan Soubusta +2 more

We analyze correlations between two parties sharing a general mixed two-qubit state ρSM in order to predict measurement outcomes. It is an interesting question as to what can be predicted about the results of two complementary projective measurements on one qubit from the measurement results on the other qubit. To quantify these predictions the complementary knowledge excessesΔK(ΠM→ΠS) and ΔK(Π′M→Π′S) are used, where ΠS, Π′S resp. ΠM, Π′M represent projective measurements on the qubit S resp. M. We derive an inequality ΔK2(ΠM→ΠS) + ΔK2(Π′M→Π′S)≤(B max /2)2, where B max is the maximum violation of Bell inequalities. This inequality restricts our capability to enhance the complementary predictions for any state ρSM and for arbitrary ΠS, Π′S and ΠM, Π′M. This result is experimentally verified on two-photon Werner states prepared by means of spontaneous parametric down-conversion.

弘一 松本

M. Iinuma

H. R. Krishnamurthy, Hamdi Mani, Harish Chandra Verma

The authors obtain the exact solution of the Schrodinger equation for a particle confined to (i) an equilateral triangle, (ii) a tetrahedral box with corners (- pi / square root 2,- pi / square root 2,- pi / square root 2), ( pi / square root 2,- pi / square root 2, pi /2); (- pi / square root 2, pi / square root 2, pi /2) and ( pi square root 2, pi / square root 2,- pi /2). The energies are: for (i) E nl =(8h(cross) 2 pi 2 /9mL 2 )(n 2 +l 2 -ln) where L is the side of the triangle and l, n are distinct non-zero integers and for (ii), E lmn =(h(cross) 2 /8m)*(3(l 2 +m 2 +n 2 )-2lm-2mn-2nl) where l, m and n are distinct non-zero integers. The wavefunctions have been classified according to the irreducible representation of the corresponding symmetry groups.