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Single Qubit and Its Universal Logic Gate Made of a Heisenberg Spin Cluster with Five Particles 下载免费PDF全文
We investigate an anisotropic Heisenberg spin cluster with five particles controlled by a time-dependent magnetic field. With the algebraic dynamical method, we obtain the exact analytical solution to the time dependent Schr6dinger equation. Based on the analytical solution, it is shown that the system can be used as a universal single qubit logic gate controlled by the strength and frequency of the magnetic field, and the six special single qubit logic gates can be realized physically. We also discuss the anti-decoherence property of the qubit and its logic gates resulted from particle coupling effect and collectivity of the cluster. 相似文献
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纳米银催化氧化偶联硫醇制二硫化物 总被引:3,自引:0,他引:3
采用多元醇为溶剂和还原剂制备了聚乙烯吡咯烷酮(PVP)保护的纳米银,并将其用于催化正十二烷基硫醇氧化偶联反应.质谱、红外光谱、拉曼光谱和核磁共振氢谱表征结果表明所得产物为二硫化物.考察了反应时间、反应温度、催化剂和水的用量等对正十二烷基硫醇氧化偶联反应的影响,从而得出优化的反应条件:0.157mmolPVP保护的纳米银,20μl水,100℃下反应3h.此外,进一步将PVP保护的纳米银用于正丁硫醇和正辛硫醇的氧化偶联反应,也得到了相应的二硫化物. 相似文献
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The Minimal Higgsless Model predicts the existence of new vector gauge boson W1± . By the process PP → W1± qq → W±Z0qq, Z0 → l+l-, W±→ qq (l=e,μ; q is hadronized to be jets), we study the sensitivity of searching for this possible vector gauge boson in the level of generator events of signal and backgrounds, then give integrated luminosity required to discover 5σ signal as a function of W1± mass. The generator for the signal PP→W1± qq→W±Z0qq at tree level is developed with the Minimal Higgsless Model and th... 相似文献
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The effective light-cone Harniltonian is extended to include the SU(3) flavor mixing interaction besides the confining potential. Solving the coupled J = 0 mass eigen equations for the up, down, and strange quark components numerically, the masses of π^0 and η, their radial wave functions, and rms radii are obtained in agreement with the experimental data. 相似文献
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The CMS and ATLAS experiments at the LHC have announced the discovery of a Higgs boson with mass at approximately 125 GeV/c2 in the search for the Standard Model Higgs boson via, notably, the γγ and ZZ to four leptons final states. Considering the recent results of the Higgs boson searches from the LHC, we study the lightest scalar Higgs boson h1 in the Next-to-Minimal Supersymmetric Standard Model by restricting the next-to-lightest scalar Higgs boson h2 to be the observed to the 125 GeV/c2 state. We perform a scan over the relevant NMSSM parameter space that is favoured by low fine-tuning considerations. Moreover, we also take the experimental constraints from direct searches, B-physics observables, relic density, and anomalous magnetic moment of the muon measurements, as well as the theoretical considerations, into account in our specific scan. We find that the signal rate in the two-photon final state for the NMSSM Higgs boson h1 with the mass range from about 80 GeV/c2 to about 122 GeV/c2 can be enhanced by a factor of up to 3.5 when the Higgs boson h2 is required to be compatible with the excess from latest LHC results. This motivates the extension of the search at the LHC for the Higgs boson h1 in the diphoton final state down to masses of 80 GeV/c2, particularly with the upcoming proton-proton collision data to be taken at center-of-mass energies of 13-14 TeV. 相似文献
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用溶液扩散法合成了一例价态互变聚合物[co^Ⅱ(3,5-DBsq)2(dpg)]·(3,5-H2DBcat)2(1)(其中3,5-DBsq=3,5-二叔丁基半醌,3,5-H2DBcat=3,5-二叔丁基邻苯二酚,dpg=内消旋一仪,13-二(4-吡啶基)乙二醇),通过单晶衍射法等确定了其结构.化合物1利用3,5-HzDBsq电活性配体和dpg桥联配体,沿b轴方向形成了锯齿状的一维链,这些链在bc平面内堆积形成了二维层状结构,层状结构又进一步沿着α轴方向堆积,形成的孔道被游离的3,5-H2DBcat分子占据.磁性测试表明了该化合物具有温度依赖的价态互变行为,其行为表现出有趣的压力效击釉半祷府 相似文献
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Considering the one-gluon exchange interaction and phenomenological quark confinement potential, an improved light-cone effective Hamiltonian for mesons and the corresponding radial mass eigen equations in angular momentum representation is obtained. Solving the J = 0 eigen equations numerically and using a set of adjustable parameters, the obtained solutions for ground states and radial excited states can simultaneously describe both pseudoscalar and scalar flavour-off-diagonal mesons. Some radial excited states are also predicted and wait for experimental test. More results for the vector and axial vector mesons are expected. 相似文献
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