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PS(PerfectShuffle)opticalinterconnectioncancomposedvariousopticalinterconnectionnetworks,forexampleΩnetwork.However,itsconver... 相似文献
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研究了 2×N阶梯形网络的对角等效电阻 ,通过网络分析构建差分方程模型 ,给出了 2×N阶梯形网络对角等效电阻的二个基本规律。 相似文献
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《Annals of Physics》1986,172(2):451-482
A method for calculating the one-loop effective potential for matter fields in Kaluza-Klein theories with the structure M4 × SN for both even and odd N is presented. The cases M4 × SN (N = 1, 2, 3, 4, 5, 6, and 8) have been examined. The method leads to finite results when N = odd and divergent results when N = even as expected. 相似文献
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The Cu(100) surface covered with atomic nitrogen has been studied with low energy electron diffraction (LEED), Auger electron spectroscopy (AES) and inelastic electron scattering (EELS). Atomic nitrogen, formed by thermal dissociation of NH3 adsorbed at 100 K, forms a c(2×2) overlayer on the Cu(100) surface. The dispersion of adsorbate and substrate associated modes of the Cu(100) surface covered with a c(2×2) nitrogen overlayer has been measured along the two dimensional Brillouin zone in the
- by inelastic electron scattering. The experimental data are compared to a lattice dynamical slab calculation. The Rayleigh-mode (S4-phonon) is only slightly changed by the N-overlayer. An optimum fit for the perpendicular and parallel nitrogen modes (=320 cm–1 and =740 cm–1 at =0.1) is obtained when the nitrogen atom is placed 0.6 Å above the first copper layer. 相似文献
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单块晶体2×2光开关 总被引:9,自引:3,他引:6
利用晶体的双折射和全内双反射现象以及晶体的电光效应 ,设计了一种单块晶体集成的 2× 2光开关 ,将一个电光调制器和两个光束分束器集成到一块铌酸锂晶体上 ,实现了光束合束、偏振态调制和光束分束三种功能。根据这种光开关的工作原理 ,给出两种开关结构 ,一种是易于级联的垂直入射结构 ,另一种是有较低操作电压的倾斜入射结构 ,并对倾斜入射结构的光开关进行了制作和测试。实验结果表明 :这种集成结构的 2× 2光开关操作电压低 ,串扰小 ,能量损耗小 ,抗干扰 ,稳定可靠 ,适用于各种光学互连网络。 相似文献
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利用成熟的偏振控制技术,设计了一种由偏振光分束器、相位型空间光调制器和反射镜构成的2×2光开关,该光开关所用器件少,具有结构简单紧凑、控制灵活方便、功能实现与信号光的偏振态无关以及可以双向交换等特点;在此基础上通过2×2光开关的串连,设计了一种与偏振无关的双向4×4光开关的实验模块,根据其路由选择与控制方法,得到了4×4光开关实现信号光全排列无阻塞输出与交换对应的路由状态表,并对该实验模块的功能实现进行了详细的分析与讨论。 相似文献
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介绍一种已研制成的低损耗、宽带、结构紧凑的保偏光纤定向耦合器(PPFDC),它可用于今后的相干纤维光学传输系统或陀螺仪上。这种耦合器由两块直径为200μm蓝宝石球透镜、一块3dB分光器和四根锥形氧化铝陶瓷套管组成,套管上的基准扁平面用于使光纤在接点保持偏振。由于直管内光纤只有很短一段经过抛光,故光纤的固有热应力变化最小。光轴和机械轴成一定角度,因而光纤端面或透镜表面不会出现串扰光。耦合器的光学方向性大于50dB,在1.3μm波长区的反射损耗大于40dB。在1.2到1.4μm内的过量损耗小于1dB。消光比大于25dB。耦合器耦合区的长度包括两块球透镜和分光器在内约1mm,光纤端面分布反馈激光二极管的谱线宽度用耦合器由延迟自零检测系统测量。采用调相耦合器的新型保偏光纤陀螺仪的实验结果表明,灵敏度和稳定度均是适用的。这些实验结果证实耦合器的上述各种特性均是正确的。 相似文献
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In this work, we study the payoffs of quantum Samaritan’s dilemma played with the thermal entangled state of XXZ spin model in the presence of Dzyaloshinskii-Moriya (DM) interaction. We discuss the effect of anisotropy parameter, strength of DM interaction and temperature on quantum Samaritan’s dilemma. It is shown that although increasing DM interaction and anisotropy parameter generate entanglement, players payoffs are not simply decided by entanglement and depend on other game components such as strategy and payoff measurement. In general, Entanglement and Alice’s payoff evolve to a relatively stable value with anisotropy parameter, and develop to a fixed value with DM interaction strength, while Bob’s payoff changes in the reverse direction. It is noted that the augment of Alice’s payoff compensates for the loss of Bob’s payoff. For different strategies, payoffs have different changes with temperature. Our results and discussions can be analogously generalized to other 2 × 2 quantum static games in various spin models. 相似文献
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Gerald Rosen 《International Journal of Theoretical Physics》1988,27(11):1351-1353
It is observed that the magnitude relationma
2
l
P/c holds if the non-Euclidean incremental spatial volume associated with a fundamental particle of massm and radiusa is characteristically quantum gravitational in a Kaluza-Klein or superstringR
4×K
N
. HereR
4 is the four-dimensional Riemannian space-time of general relativity andK
N
is a small-scale, compact,N-dimensional space of characteristic quantum gravitational volumel
P
N
, withl
P (G/c
3)1/2= 1.61×10–33 cm denoting the Planck length. For the electron and electron neutrino (assumed to possess nonzero mass bounded empirically by
<30 eV) the derived magnitude relationa(l
P/mc)1/2 yields the estimatesa
e
2.5×10–22 cm and
3.3×10–20 cm, spatial extensions which may be detectable by way of fine-scale effects in SSC experiments. 相似文献