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非简谐振子湮灭算符高次幂bN-本征态的量子统计性质 总被引:2,自引:0,他引:2
本文了研究了非简谐振子湮灭算符高次幂b^N-(N≥2)本征态的量子统计性质。 相似文献
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本文构造了以奇偶q相干态为特例的一般叠加q相干态|α,θ〉q=c(|α〉q+e^iθ|-α〉a),并研究了它的振幅M次方压缩性质,发现这种叠加态只存在振幅奇数次方压缩效应。并数值计算了叠加系娄籴形参数对压缩的影响。 相似文献
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生长了系列掺杂低铁(质量分数分别为0×10-6,3×10-6,5×10-6,10×10-6,25×10-6,50×10-6、100×10-6)的近化学配比铌酸锂(SLN)晶体,测量了它们的紫外-可见光谱,并通过477nm处的线性吸收系数估算晶体中Fe2+和Fe3+的浓度。利用抽运(365nm)-探测(632.8nm)法测量不同掺杂浓度晶体光致吸收的动态过程和稳态特性,结果表明光致吸收是以扩展指数的形式衰减的,其衰减时间常数(即小极化子的寿命)随掺杂浓度和抽运光强增加而减小,扩展指数因子随抽运光强的增加而减少。根据电子的输运方程,利用四阶龙格-库塔方法对电子输运过程进行数值求解,模拟了掺铁铌酸锂(Fe:SLN)晶体的光致吸收的全过程,与实验所得结果符合得很好。 相似文献
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Orientation effects on the bandgap and dispersion behavior of 0.91Pb(Zn<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>-0.09PbTiO<sub>3</sub> single crystals 下载免费PDF全文
0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO 3(PZN-9%PT) single crystals with different orientations are investigated by using a spectroscopic ellipsometer,and the refractive indices and the extinction coefficients are obtained.The Sellmeier dispersion equations for the refractive indices are obtained by the least square fitting,which can be used to calculate the refractive indices in a low absorption wavelength range.Average Sellmeier oscillator parameters E o,λ o,S o,and E d are calculated by fitting with the single-term oscillator equation,which are related directly to the electronic energy band structure.The optical energy bandgaps are obtained from the absorption coefficient spectra.Our results show that the optical properties of [001] and [111] poled crystals are very similar,but quite different from those of the [011] poled crystal. 相似文献
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An optically fixed photorefractive correlator is presented,where two-centre non-volatile holographic recording is employed to write and fix the matched filter in doubly doped LiNbO3 crystals.This correlator shows good correlation characteristics and insensitivity to the writing beam during readout.It can be used in cased requiring stability and not requiring modification for a long period,and it is refreshed optically when new information needs to be registered. 相似文献
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