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1.
Laser-assisted Stark deceleration scheme was proposed to decelerate the high-field-seeking molecule ICl in its rovibronic ground state. However, the laser intensity of 1.0×1010 W/cm2 is hard to realize in experiment. The time-of-flight signals of HC2n+1N (n=2, 3 and 4) by three-dimensional Monte-Carlo simulation suggest that deceleration of such molecules is more feasible experimentally as only one-tenth laser intensity is needed. 相似文献
2.
V. D. Gershun 《Physics of Atomic Nuclei》2010,73(2):304-310
We used the invariant local chiral currents of principal chiral models for SU(n), SO(n), SP(n) groups to construct new integrable
string equations of hydrodynamic type on the Riemann space of the chiral primitive invariant currents and on the chiral nonprimitive
Casimir operators as Hamiltonians. 相似文献
3.
K. H. Song Y. J. Zhao Z. G. Shi S. H. Xiang X. W. Chen 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2012,66(1):1
In the system with superconducting quantum interference devices (SQUIDs) in a cavity, we propose a scheme for simultaneous
implementing n phase gates and one step preparing the highly entangled cluster states based on the two-channel Raman interaction. In our
scheme, the system is independent to the photon number of the cavity field, the cavity field can be initially in an arbitrary
state, which is convenient for the experimental operation. The n phase gates operation and the cluster state generation are realized by using only the two lower flux states of the SQUID
and the excited state would not be excited so that the influence of the decoherence due to spontaneous emission of the SQUID’s
levels is possible to minimize. More importantly, the operation time of the phase gates is independent of the number n of the qubits. Finally, the experimental feasibility is also discussed in detail. 相似文献
4.
Utilizing a three-particle W state, we come up with a protocol for the teleportation of an unknown two-particle entangled state. It is shown that the teleportation can be deterministically and exactly realized. Moreover, two-particle entanglement teleportation is generalized to a system consisting of many particles via a three-particle W state and a multi-particle W state, respectively. All unitary transformations performed by the receiver are given in a concise formula. 相似文献
5.
6.
Recently the replica limit n = 0 of the U(n) and U(n)/SO(n) models have attracted interest since they describe the Anderson localization behaviour in the band-centre of a two-sublattice model. For n ≠ 0 the theories can be decomposed into one with symmetry U(1) and one for SU(n) and U(n)/SO(n). This does not no longer hold for n = 0. We show how the beta-functions and zeta-functions for operators without derivatives can be obtained in this limit from those of SU(n) and U(n)/SO(n) and draw consequences for these functions in this limit. 相似文献
7.
A scheme for teleporting an arbitrary n-bit one-photon and vacuum entangled Greenberger-Horne-Zeilinger (GHZ) state is proposed. In this scheme, the maximum entanglement GHZ state is used as a quantum channel. We find a method of distinguishing four Bell states just by detecting the atomic states three times, which is irrelevant to the qubit number of the state to be teleported. 相似文献
8.
In this study, we investigate formulas of the number of states with a given total spin I and isospin T for n nucleons in a single-j shell denoted by \begin{document}$ D_{IT} (j, n) $\end{document} ![]()
![]()
. Talmi's recursion formulas for the number of states with a given z-axis projection of total spin are generalized by further considering the isospin couplings and are applied to derive explicit formulas of \begin{document}$ D_{IT} (j, n) $\end{document} ![]()
![]()
. 相似文献
9.
采用有限差分法对非线性色散K(m,n,p)方程的多-Compacton之间的相互作用进行了数值研究.该差分方法为二阶精度且线性意义下绝对稳定的无耗散格式,通过添加人工耗散项有效防止了数值解的爆破现象.首先对单-Compacton的长时间演化行为进行了数值模拟,验证了数值方法的有效性.然后对双-CompaCton和三-Compacton的碰撞过程进行了数值研究,发现多-Compacton碰撞之后基本保持碰撞之前的波形和波速,但在波后产生小振幅的Compacton-Anticompacton对. 相似文献
10.
We propose a simple scheme to generate an arbitrary photon-added coherent state of a travelling optical field by combining an array of degenerate parametric amplifiers and corresponding single-photon detectors. Particularly, when the single-photon-added coherent state is observed by developing the novel technique of Zavatta et al (2004 Science 306 660), we can simultar/eously obtain the generalized N-qubit W state. 相似文献
11.
Recently the replica limit n = 0 of the U(n) and
models have attracted interest since they describe the Anderson localization behaviour in the band-centre of a two-sublattice model. For n ≠ 0 the theories can be decomposed into one with symmetry U(1) and one for SU(n) and
. This does not no longer hold for n = 0. We show how the beta-functions and zeta-functions for operators without derivatives can be obtained in this limit from those of SU(n) and
and draw consequences for these functions in this limit. 相似文献
12.
采用密度泛函理论(density functional theory, DFT) 在B3LYP/LANL2DZ基组水平上对钨团簇吸附CO分子进行了系统研究. 结果表明, WnCO团簇的基态结构是在Wn团簇中性或阴离子基态结构的基础上吸附CO生长而成; CO的吸附以端位吸附为主,桥位吸附为辅; CO分子在Wn团簇表面发生的是非解离性吸附. 与优化的CO键长(0.116 nm)相比,吸附后C-O键长变长(0.120–0.123 nm), 表明吸附后C-O键被削弱, CO分子被活化了.稳定性分析表明,在所研究的团簇中, W3CO和W5CO团簇的稳定性较强;自然键轨道(NBO)分析表明, W原子与CO分子相互作用的本质是CO分子内的杂化轨道与W原子6s, 5d, 6p和6d轨道相互作用的结果.
关键词:
nCO (n= 1–6)团簇')" href="#">WnCO (n= 1–6)团簇
基态构型
稳定性
电子性质 相似文献
13.
Using even and odd coherent states, we define a new state, which is called the spin-type W state. With the spin-type W states, we provide a new scheme for testing fundamental aspects of quantum mechanics and refuting local hidden variable theory without using inequalities. Finally, a scheme for preparing the spin-type W states, and discussion of experimental possibility and the effect of the measurement on physical observables due to a close orthogonality of the two coherent states are given. 相似文献
14.
This paper computationally investigates the RhSin (n = 1 6) clusters by using a density functional approach. Geometry optimizations of the RhSin (n = 1 6) clusters are carried out at the B3LYP level employing LanL2DZ basis sets. It presents and discusses the equilibrium geometries of the RhSin (n = 1-6) clusters as well as the corresponding averaged binding energies, fragmentation energies, natural populations, magnetic properties, and the energy gaps between the highest occupied molecular orbital and the lowest unoccupied molecular orbital. Theoretical results show that the most stable RhSin(n = 1-6) isomers keep an analogous framework of the corresponding Sin+1 clusters, the RhSi3 is the most stable cluster in RhSin (n = 1-6) isomers. Furthermore, the charges of the lowest-energy RhSin (n = 1-6) clusters transfer mainly from Si atom to Rh atom. Meanwhile, the magnetic moments of the RhSin(n = 1-6) arises from the 4d orbits of Rh atom. Finally, compared with the Sin+1 cluster, the chemical stability RhSin clusters are universally improved. 相似文献
15.
Implementation of n-qubit Deutsch--Jozsa algorithm using resonant interaction in cavity QED
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We propose a scheme to implement the n-qubit Deutsch--Jozsa
algorithm based on resonant interaction between the atoms and a
single-mode cavity. In the scheme, the resonant transitions between
two ground states and one excited state of an atom are changed
alternately by adjusting the cavity frequency appropriately, and the
operations required to complete the algorithm can be significantly
simplified following the increment of the number of qubits. The
implementation of the scheme in experiment would show the full power
of quantum algorithm and would be significative and important for
more complicated quantum algorithm in cavity quantum electrodynamics. 相似文献
16.
采用密度泛函理论(DFT)中的B3LYP方法,在Lanl2dz基组水平上对WnNim(n+m=8)团簇的各种可能构型进行了几何参数全优化,得到了它们的基态构型;并对基态构型的平均结合能、Wiberg键级(WBI)、磁学性质、NBO进行了分析,结果表明:团簇随着W原子数的增多,稳定性增强,n≥5时,结构中都含有纯钨团簇的结构基元;W-W键级高于W-Ni键和Ni-Ni键;W5Ni3,W6Ni2团簇发生了"磁矩猝灭"的现象;在W,Ni原子内部,轨道电荷发生了转移,产生了"轨道杂化"现象,W,Ni原子之间也发生了电荷转移形成了较强的化学键.
关键词:
nNim(n+m=8)团簇')" href="#">WnNim(n+m=8)团簇
几何结构
电子性质
密度泛函理论 相似文献
17.
18.
Relativistic multichannel treatment of autoionization Rydberg series of 4s^2nf(n=4- 23)J^π -(7/2)° for scandium
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Based on relativistic multichannel theory, this paper calculates the energy levels of autoionization Rydberg series 4s^2nf(n=4- 23)J^π -(7/2)° of scandium at different levels of approximation within the framework of multichannel quantum defect theory. The present results show that the dipole polarizations play an important role. Considering the dynamical dipole polarization effects, this paper finds that the difference between calculated and experimental quantum defects for the 4s^2nf(n=4- 23)J^π -(7/2)° series is generally about 0.01- 0.03. Furthermore, the reason that 4s^216f is obscured in experimental spectra is suggested to be the interaction with the neighbouring resonance state converged to 3d^2(^1G4) of Sc^+. 相似文献
19.
Efficient scheme for preparation of the multi-atom W state via cavity quantum electrodynamics
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We present an efficient scheme for preparation of the multi-atom W state via cavity quantum electrodynamics. Involved in this scheme are n identical two-level atoms and a single-mode cavity field. Discussion indicates that this scheme can be realized easily by current technologies. 相似文献
20.
N. Kijima R. Gronsky
X. -D. Xiang
W. A. Vareka A. Zettl J. L. Corkill Marvin L. Cohen 《Physica C: Superconductivity and its Applications》1992,190(4):597-605The crystal structure of stage-3 iodine-intercalated superconducting IBi6Sr6Ca3Cu6Ox has been determined by transmission electron microscopy to belong to the space group Pma2 with lattice parameters a=5.4Å, B=5.4Å and C=49.4Å. Ioidine atoms intercalated between every three Bi---O bilayers expand the distance between the Bi---O layers by 3.6Å and alter the atomic stacking across Bi---O layers from the staggered configuration characteristic of host superconducting Bi2Sr2CaCu2Ox to an aligned configuration characteristic of stage-1 iodine-intercalated superconducting IBi2Sr2CaCu2Ox. Higher-stage intercalation has also been observed as stacking faults which predominantly contain both stage-2 and stage-3 phases. The space groups and c-axis dimensions of the higher-stage phases have been deduced to be Pma2 with c=3.6+15.3n Å when stage number n is odd, and Bbmb with c=2(3.6+15.3n) Å when n is even. 相似文献