共查询到20条相似文献,搜索用时 31 毫秒
1.
A. Mudrov 《Letters in Mathematical Physics》2018,108(6):1443-1454
We construct a \(U_q\bigl (\mathfrak {s}\mathfrak {o}(2n+1)\bigr )\)-equivariant local star product on the complex sphere \(\mathbb {S}^{2n}\) as a non-Levi conjugacy class \(SO(2n+1)/SO(2n)\). 相似文献
2.
Physics of Atomic Nuclei - In the present study, we investigate even–even $${}^{236{-}246}$$ Pu isotopes with triaxial interacting boson model. Calculations for the energy levels and $$E$$ 2... 相似文献
3.
Robert L. Karp 《Communications in Mathematical Physics》2007,270(1):163-196
We construct geometric representatives for the fractional branes in terms of branes wrapping certain exceptional cycles of the resolution. In the process we use large radius
and conifold-type monodromies, and also check some of the orbifold quantum symmetries. We find the explicit Seiberg-duality
which connects our fractional branes to the ones given by the McKay correspondence. We also comment on the Harvey-Moore BPS
algebras. 相似文献
4.
5.
We show that a Hamiltonian reduction of affine Lie superalgebras having bosonic simple roots (such as OSp
) does produce supersymmetric Toda models, with superconformal symmetry being nonlinearly realized for those fields of the Toda system which are related to the bosonic simple roots of the superalgebra. A fermionic b-c system of conformal spin
is a natural ingredient of such models. 相似文献
6.
Lucy Gow 《Czechoslovak Journal of Physics》2005,55(11):1415-1420
Jonathan Brundan and Alexander Kleshchev recently introduced a new family of presentations for the Yangian Y
of the general linear Lie algebra
. In this article, we extend some of their ideas to consider the Yangian Y
of the Lie superalgebra
. In particular, we give a new proof of the result by Nazarov that the quantum Berezinian is central.
Presented at the International Colloquium “Integrable Systems and Quantum Symmetries”, Prague, 16–18 June 2005. 相似文献
7.
Miklukho O. V. Kisselev A. Yu. Amalsky G. M. Andreev V. A. Barsov S. G. Gavrilov G. E. Zhdanov A. A. Izotov A. A. Ilyin D. S. Kozlenko N. G. Kravchenko P. V. Maysuzenko D. A. Murzin V. I. Novinskiy D. V. Shvedchikov A. V. 《Physics of Atomic Nuclei》2020,83(3):431-441
Physics of Atomic Nuclei - The secondary proton polarization and differential cross sections of the ( $$p,p^{\prime}$$ ) inelastic reaction on nuclei $${}^{9}$$ Be and $${}^{90}$$ Zr at the initial... 相似文献
8.
First-principle calculations on the structural, electronic, optical, elastic and thermal properties of the chalcopyrite \(\hbox {MgXAs}_{2}\) (\(\hbox {X}=\hbox {Si}, \hbox {Ge}\)) have been performed within the density functional theory (DFT) using the full-potential linearized augmented plane wave (FP-LAPW) method. The obtained equilibrium structural parameters are in good agreement with the available experimental data and theoretical results. The calculated band structures reveal a direct energy band gap for the interested compounds. The predicted band gaps using the modified Becke–Johnson (mBJ) exchange approximation are in fairly good agreement with the experimental data. The optical constants such as the dielectric function, refractive index, and the extinction coefficient are calculated and analysed. The independent elastic parameters namely, \(C_{11}\), \(C_{12}\), \(C_{13}\), \(C_{33}\), \(C_{44}\) and \(C_{66 }\) are evaluated. The effects of temperature and pressure on some macroscopic properties of \(\hbox {MgSiAs}_{2}\) and \(\hbox {MgGeAs}_{2}\) are predicted using the quasiharmonic Debye model in which the lattice vibrations are taken into account. 相似文献
9.
Novikov N. V. Chechenin N. G. Chuvilskaya T. V. Chumanov V. Ya. Shirokova A. A. 《Physics of Atomic Nuclei》2021,84(4):425-432
Physics of Atomic Nuclei - Quantum-mechanical models and the Monte Carlo method are used to study the composition and energies of products of nuclear reactions induced by collisions of fast protons... 相似文献
10.
I. L. Buchbinder E. A. Ivanov O. Lechtenfeld I. B. Samsonov B. M. Zupnik 《Physics of Particles and Nuclei》2008,39(5):759-797
We review the non-anticommutative Q-deformations of = (1, 1) supersymmetric theories in four-dimensional Euclidean harmonic superspace. These deformations preserve chirality
and harmonic Grassmann analyticity. The associated field theories arise as a low-energy limit of string theory in specific
backgrounds and generalize the Moyal-deformed supersymmetric field theories. A characteristic feature of the Q-deformed theories is the half-breaking of supersymmetry in the chiral sector of the Euclidean superspace. Our main focus
is on the chiral singlet Q-deformation, which is distinguished by preserving the SO(4) ∼ Spin(4) “Lorentz” symmetry and the SU(2) R-symmetry. We present the superfield and component structures of the deformed = (1, 0) supersymmetric gauge theory as well as of hypermultiplets coupled to a gauge superfield: invariant actions, deformed
transformation rules, and so on. We discuss quantum aspects of these models and prove their renormalizability in the Abelian
case. For the charged hypermultiplet in an Abelian gauge superfield background we construct the deformed holomorphic effective
action.
The text was submitted by the authors in English. 相似文献
11.
12.
In this paper we investigate the dynamics of relativistic (in particular, closed) strings moving in the Minkowski space
. We first derive a system with n nonlinear wave equations of Born-Infeld type which governs the motion of the string. This system can also be used to describe the extremal surfaces in
. We then show that this system enjoys some interesting geometric properties. Based on this, we give a sufficient and necessary condition for the global existence of extremal surfaces without space-like point in
with given initial data. This result corresponds to the global propagation of nonlinear waves for the system describing the motion of the string in
. We also present an explicit exact representation of the general solution for such a system. Moreover, a great deal of numerical analyses are investigated, and the numerical results show that, in phase space, various topological singularities develop in finite time in the motion of the string. Finally, some important discussions related to the theory of extremal surfaces of mixed type in
are given. 相似文献
13.
S. G. Zemlyanoi D. V. Karaivanov Yu. P. Gangrsky K. P. Marinova B. N. Markov J. Badamsambuu 《Hyperfine Interactions》2010,196(1-3):107-113
Using the method of laser-induced fluorescence in an atomic beam we have measured the hyperfine splitting constants, A and B, of the ground and excited states of the optical transition 4f 76s 2 8S $_{1/2}\to 4f^{7}$ 6s6p 6P5/2 (564.58 nm) for 151???155Eu isotopes. For all isotopes, the magnetic dipole constants of the 6P5/2 atomic level are determined to a precision better than 0.04%. The A and B constants for the ground state 8S7/2 of the radioactive 152,154,155Eu were obtained for the first time with a precision better than 0.5%. Our data along with previous ground state hyperfine structure measurements for the stable europium isotopes allow us to determine the hyperfine anomaly for mentioned Eu isotopes. 相似文献
14.
In a quantum harmonic oscillator (QHO), the energy of the oscillator increases with increased frequency. In this paper, assuming a boundary condition that the product of momentum and position, or the product of energy density and position remains constant in the QHO, it is established that a particle subjected to increasing frequencies becomes gradually subtler to transform into a very high dormant potential energy. This very high dormant potential energy is referred to as ‘like-potential’ energy in this paper. In the process a new wave function is generated. This new function, which corresponds to new sets of particles, has scope to raise the quantum oscillator energy (QOE) up to infinity. It is proposed to show that this high energy does not get cancelled but remains dormant. Further, it is proposed that the displacement about the equilibrium goes to zero when the vibration of the oscillator stops and then the QOE becomes infinity – this needs further research. The more the QOE, the greater will be the degree of dormancy. A simple mathematical model has been derived here to discuss the possibilities that are involved in the QHO under the above-mentioned boundary conditions. 相似文献
15.
Physics of Atomic Nuclei - This paper presents a phenomenological study of differential $$W^{+}/W^{-}$$ cross section ratios for $$W$$ -boson production in association with a jet through... 相似文献
16.
We provide the energy spectrum of an electron in a degenerately doped semiconductor of parabolic band. Knowing the energy spectrum, the density-of-states (DOS) functions are obtained, considering the Gaussian distribution of the potential energy of the impurity states, showing a band tail in them e.g., energy spectrum and density-of-states. Therefore, Fermi integrals (FIs) of DOS functions, having band tail, are developed by the exact theoretical calculations of the same. It is noticed that with heavy dopings in semiconductors, the total FI demonstrates complex functions, containing both real and imaginary terms of different FI functions. Their moduli possess an oscillatory function of \(\eta \) (reduced \(\hbox {Fermi energy} = E_{\mathrm{f}}/k_{\mathrm{B}}T\), \(k_{\mathrm{B}}\) is the Boltzmann constant and T is the absolute temperature) and \(\eta _{e}\) (impurity screening potential), having a series solutions of confluent hypergeometric functions, \(\Phi (a, b; z)\), superimposed with natural cosine functions of angle \(\theta \). The variation of \(\theta \) with respect to \(\eta \) indicated a resonance at \(\eta =1.5\). The oscillatory behaviour of FIs show the existence of ‘band-gaps’, both in the real as well as in the forbidden bands as new band gaps in the semiconductor. 相似文献
17.
Belyaev V. S. Matafonov A. P. Krainov V. P. Kedrov A. Yu. Zagreev B. V. Rusetsky A. S. Borisenko N. G. Gromov A. I. Lobanov A. V. Lisitsa V. S. 《Physics of Atomic Nuclei》2020,83(5):641-650
Physics of Atomic Nuclei - The results of experimental investigations devoted to initiating the promising nuclear fusion reaction $${}^{11}$$ B $$(p,3\alpha)$$ in picosecond laser plasmas at a... 相似文献
18.
Galanina L. I. Zelenskaya N. S. Lebedev V. M. Orlova N. V. Spassky A. V. 《Physics of Atomic Nuclei》2020,83(3):369-376
Physics of Atomic Nuclei - Angular $$t$$ – $$\gamma$$ correlations measured earlier in the reaction $${}^{27}$$ Al $$(\alpha,t)^{28}$$ Si(2 $${}^{+}$$ ) occurring at $$E_{\alpha}=30.3$$ MeV... 相似文献
19.
Shitov M. I. Voitenkov D. A. Kamerdzhiev S. P. Tolokonnikov S. V. 《Physics of Atomic Nuclei》2022,85(1):42-49
Physics of Atomic Nuclei - For the first time, a self-consistent method for studying second-order anharmonic effects within quantum many-body theory is applied to calculating probabilities for... 相似文献
20.
Pratik Pataniya G K Solanki Chetan K Zankat Mohit Tannarana C K Sumesh K D Patel V M Pathak 《Pramana》2018,90(3):41
Excitation functions for \(\alpha \)-induced reactions on natural vanadium were measured in the energy range up to 20 MeV. The stacked-foil activation technique was used. The experimental results were compared with the theoretical calculations using EMPIRE-3.1, EMPIRE-3.2.2 and TENDL 2015, and with earlier experimental results. Thick target yields were calculated for the production of \(^{54}\hbox {Mn}\) and for the associated impurity \(^{52}\hbox {Mn}\). 相似文献