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1.
与q形变玻色算符逆算符相关的相干态及其量子统计性质 总被引:1,自引:1,他引:0
讨论了q形变玻色算符的广义逆算符作用于q-相干态所得到的两类量子态的数学及量子统计性质。结果表明,q-相干态的光子激发态不存在压缩但呈现反聚束效应,而q-相干态的光子湮灭态却存在压缩但不呈现反聚束效应。 相似文献
2.
叠加q相干态的振幅M次方压缩 总被引:1,自引:1,他引:0
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
3.
参数化玻色湮灭算符高次幂的本征态及其量子起伏规律 总被引:1,自引:1,他引:0
以参数化方式「y」=(q^y-1)/(q-1)定义q玻色湮灭算符aq,生成相应的q相干态,找出能产生并保持这类q相干态的体系的哈密顿量。研究了α^kq的正交归一本征态的数学结构和量子起伏性质,发现这些本征态中只有偶q相干态存在通常的压缩效应,并且当q〈1时,场的两个正交分量在各态中的量子起估可以同时有小于相干态的最小不确定度,有q压缩效应。 相似文献
4.
q—玻色湮没有符高次幂的本征态及其性质 总被引:1,自引:1,他引:0
研究了q-玻色湮没算符高次幂α^kq(k≥3)的正交归一本征态的数学结构,在此基础上讨论了它们的数学性质及其q-压缩和振幅N次方压缩特性,发现它们能组成一个完备的希尔伯特(Hilbert)空间;且当k为偶数时,这些本征态均可存在振幅N次方[N=(m+1/2)k,m=0,1,2,…]压缩。 相似文献
5.
一种新型的两态叠加多模Schrodinger猫态光场的等阶N次方Y压缩 总被引:31,自引:20,他引:11
本文根据量子力学的线性叠回后果色造了由多模(即q模)相干态的相反态|{-Zj}q及多模虚相干态|{iZj}〉q这两者的线性叠加所组成的一种新型的多模Schrodinger猫态光场|Ψ^(2)〉q,利用新近建立的多模压缩态理论,研究了态|Ψ^(2)q的N次方Y压缩效应。结果发现:(1)当压缩阶数N=2p且p=2m(m=1,2,3,…,…)时,态|Ψ^(2)q总是恒处于N-Y最小测不准态;(2)当压缩 相似文献
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A model,which treats three initial parlous as two color singlets and then both of them fragment independently into hadrons, is employed to study the angular dependence of charged multiplicity distribution in e+ e- annihilation into three-jet events at LEP energy region. The calculated results show a distinguished dependence of charged multiplicity to topology structure of events, and also agree well with experiment data from ALEPH collaboration. 相似文献
12.
Features of the total disintegration events of heavyemulsion targets caused by 4.5A GeV/c16O 下载免费PDF全文
Total disintegration events produced by 4.5\,A GeV/c $^{16}$O--AgBr interactions are
analysed to investigate the characteristics of secondary charged particles produced
in such collisions. The multiplicity distributions of grey, black, and relativistic
charged particles can be well represented by Gaussian distribution. The average
multiplicity of grey particles is found to increase with the mass of projectile
increasing, while that of black particles is found to decrease with the mass of
projectile increasing. This result is in good agreement with the prediction of
fireball model. Finally, the linear dependence between grey and black particles is
observed, but there is no distinct dependence between the production of relativistic
charged particles and the target excitation. 相似文献
13.
Yu. G. Werbetsky 《Zeitschrift fur Physik C Particles and Fields》1992,56(4):689-696
The correspondence between the moments of distribution of primary particles total multiplicity and the moments of partial distribution of charged hadrons multiplicity is obtained. This dependence permits to describe the data on the charged hadrons multiplicity moments by means of negative binomial distribution (NBD) for total hadron multiplicity. The NBD parameterk is fitted as a rational function of c.m. energy. 相似文献
14.
利用兰州4π带电粒子探测器阵列测量带电粒子多重性,研究了55MeV/u 40Ar+58,64Ni核反应中He和中等质量碎片的产额与反应系统同位旋的关系,以及这种同位旋效应与反应系统的碰撞参数(即碰撞的激烈程度)、系统的激发能的变化关系,对两个反应系统,观察到带电粒子多重性中He的比分随带电粒子多重性的增加而增大,带电粒子多重性中IMF的比分随带电粒子多重性的增加而先增大,后减小的规律.两个反应系统虽然具有相同的核电荷数,但轻粒子He和中等质量碎片在多重性中的比分有明显的同位旋相关性。 相似文献
15.
I.G. Bearden H. Bøggild J. Boissevain P.H.L. Christiansen L. Conin J. Dodd B. Erazmus S. Esumi C.W. Fabjan D. Ferenc A. Franz J.J. Gaardhøje A.G. Hansen O. Hansen D. Hardtke H. van Hecke E.B. Holzer T.J. Humanic P. Hummel B.V. Jacak K. Kaimi M. Kaneta T. Kohama M. Kopytine M. Leltchouk A. Ljubičić Jr. B. Lörstad N. Maeda L. Martin A. Medvedev M. Murray H. Ohnishi G. Paić S.U. Pandey F. Piuz J. Pluta V. Polychronakos M. Potekhin G. Poulard D. Reichhold A. Sakaguchi J. Schmidt-Sørensen J. Simon-Gillo W. Sondheim T. Sugitate J.P. Sullivan Y. Sumi W.J. Willis K. Wolf N. Xu D.S. Zachary 《The European Physical Journal C - Particles and Fields》2000,18(2):317-325
Two-particle correlations of negative pions as a function of charged particle multiplicity are studied in Pb+Pb collisions
at GeV per nucleon using the NA44 experiment at the CERN Super Proton Synchrotron(SPS). We find that the source size parameters
increase with the charged particle multiplicity. However the slope of the source size parameters plotted as a function of
charged multiplicity is slightly larger at high multiplicity than at low multiplicity. The value of is independent of charged multiplicity. For Pb+Pb collisions, is larger than and for all multiplicity intervals, whereas these three radius parameters were approximately equal in S+Nucleus collisions. The
ratios () and () for Pb+Pb data show almost no dependence on charged multiplicity. The duration of pion emission is constant at 3.81.1 fm/c as a function of the charged multiplicity in Pb+Pb collisions. Effective volume (V) is also calculated as V=, assuming a cylindrically shaped source. We found, within the limited statistics, the effective volume rapidly increases
at high multiplicity.
Received: 17 July 2000 / Revised version: 3 November 2000 / Published online: 8 December 2000 相似文献
16.
JETP Letters - We have studied the charged particles spectra for the pseudorapidity region of ∣η∣ < 2.5, the multiplicity of charged particles, its dependence on pT as well... 相似文献
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Sudhir Malik S. K. Soni R. K. Shivpuri 《Zeitschrift fur Physik C Particles and Fields》1995,67(2):239-244
Experimental results on multiplicity distributions for full phase space and in different pesudorapidity windows of charged secondary particles produced in proton-nucleon collisions at 800 GeV are presented and discussed. It is found that all these multiplicity distributions are well described by negative binomial distributions. We interpret our results on the basis of clan model. The bin size dependence of multiplicity distribution of charged secondary particles in proton-nucleon interactions is analysed in terms of multifractals. The values of generalised dimensions obtained from fitted distributions show a good agreement with those obtained from the data. 相似文献
18.
M. El-Nadi M.S. El-Nagdy A. Abdelsalam E.A. Shaat N. Ali-Mossa Z. Abou-Moussa Kh. Abdel-Waged A. M-Abdalla E. El-Falaky 《The European Physical Journal A - Hadrons and Nuclei》2001,10(2):177-181
Data on the multiplicity of secondaries in central events of 28Si (14.6 AGeV) and 32S (3.7 AGeV) interactions with AgBr emulsion nuclei have been compiled and studied. The dependence of the multiplicities of
the outgoing charged stripping particles on the number of interacting nucleons and therefore on the impact parameter, as indicated
by the target size, and consequently, on the degree of centrality is investigated. The resultant multiplicity distribution
of the produced pions for each studied case is fitted by both Negative Binomial (NB) and Poisson distributions. The NB distribution
is valid for most of the considered cases. The transparency of the target for a projectile was found to become more pronounced
as the incident energy increased.
Received: 20 June 2000 / Accepted: 17 January 2001 相似文献
19.
在s=540GeV时,用一个完整的Chou-Yang模型Monte-Carlo产生器,去描写PP碰撞非衍过程的多粒子产生,定量地研究了次级粒子纵向动量对粒子多重数的依赖.结果表明,随着多重数减小,次级粒子平均纵动量变大,X分布变平. 相似文献
20.
D S Narayan 《Pramana》1974,2(5):252-258
Topological cross sections for diffractive and nondiffractive components in pp collisions are deduced on the basis of a dynamical
model proposed earlier to explain the multiplicity distribution of charged particles. The model has an important prediction
for the angular and momentum distributions of charged particles in diffractive events. 相似文献