查看更多>>摘要：We present the first numerical solution that corresponds to a pair of Cho-Maison monopoles and antimonopoles(MAPs)in the SU(2)× U(1)Weinberg-Salam(WS)theory.The monopoles are finitely separated,while each pole carries a magnetic charge±4π/e.The positive pole is situated in the upper hemisphere,whereas the negative pole is in the lower hemisphere.The Cho-Maison MAP is investigated for a range of Weinberg angles,0.4675≤tanθw ≤ 10,and Higgs self-coupling,0≤β≤ 1.7704.The magnetic dipole moment(μm)and pole separation(dz)of the numerical solutions are calculated and analyzed.The total energy of the system,however,is infinite due to point singularities at the locations of monopoles.
查看更多>>摘要：In this paper,the proton structure function Fp2(x,Q2)at small-x is investigated using an analytical solution to the Balitsky-Kovchegov(BK)equation.In the context of the color dipole description of deep inelastic scattering(DIS),the structure function Fp2(x,Q2)is computed by applying the analytical expression for the scattering amplitude N(k,Y)derived from the BK solution.At transverse momentum k and total rapidity Y,the scattering amplitude N(k,Y)represents the propagation of the quark-antiquark dipole in the color dipole description of DIS.Using the BK solution we extracted the integrated gluon density xg(x,Q2)and then compared our theoretical estimation with the LHAPDF global data fits,NNPDF3.1sx and CT18.Finally,we have investigated the behavior of Fp2(x,Q2)in the kinematic region of 10-5 ≤x≤10-2 and 2.5 GeV2≤Q2≤60 GeV2.Our predicted results for Fp2(x,Q2)within the specified kinematic region are in good agreement with the recent high-precision data for Fp2(x,Q2)from HERA(H1 Collaboration)and the LHAPDF global parametrization group NNPDF3.1sx.
查看更多>>摘要：The effective liquid drop model(ELDM)is improved by introducing an accurate nuclear charge radius formula and an analytic expression for assaulting frequency.Within the improved effective liquid drop model(IMELDM),the experimental cluster radioactivity half-lives of the trans-lead region are calculated.It is shown that the accuracy of the IMELDM is improved compared with that of the ELDM.At last,the cluster radioactivity half-lives that are experimentally unavailable for the trans-lead nuclei are predicted by the IMELDM.These predictions may be useful for searching for new candidates for cluster radioactivity in future experiments.
查看更多>>摘要：In this paper,we consider the Böhmer-Vandersloot(BV)model of loop quantum black holes obtained from the improved dynamics approach.We adopt the Saini-Singh gauge,in which it was found analytically that the BV spacetime is geodesically complete.We show that black/white hole horizons do not exist in this geodesically complete spacetime.Instead,there exists only an infinite number of transition surfaces,which always separate trapped regions from anti-trapped ones.Comments on the improved dynamics approach adopted in other models of loop quantum black holes are also given.
查看更多>>摘要：This article presents advancements in an analytical mode-matching technique for studying electromagnetic wave propagation in a parallel-plate metallic rectangular waveguide.This technique involves projecting the solution onto basis functions and solving linear algebraic systems to determine scattering amplitudes.The accuracy of this method is validated via numerical assessments,which involve the reconstruction of matching conditions and conservation laws.The study highlights the impact of geometric and material variations on reflection and transmission phenomena in the waveguide.
查看更多>>摘要：Density order is usually a consequence of the competition between long-range and short-range interactions.Here we report a density ordered superfluid emergent from a homogeneous Mott insulator due to the competition between frustrations and local interactions.This transition is found in a Bose-Hubbard model on a frustrated triangle lattice with an extra pairing term.Furthermore,we find a quantum phase transition between two different density ordered superfluids,which is beyond the Landau-Ginzburg(LG)paradigm.A U(1)symmetry is emergent at the critical point,while the symmetry in each density ordered superfluid is Z2 × Z3.We call the transition a'shamrock transition',due to its degenerate ground state in the parameter space being a shamrock-like curve rather than a circle in an LG-type transition.Effective low energy theories are established for the two transitions mentioned above and we find their resemblance and differences with clock models.
D A BaghdasaryanV A HarutynyanE M KazaryanH A Sarkisyan...
165-173页
查看更多>>摘要：This paper theoretically studies the impurity states and the effects of impurity concentration and configuration on the optical,electrical,and statistical properties of CdSe nanoplatelets(NPLs).An image charge-based model of electron-impurity interaction is proposed.The charge-carrier energy spectra and corresponding wave functions depending on the impurity number and configuration are calculated.The electron binding energies are calculated for different NPL thicknesses.It is shown that the image charge-based interaction potential that arises due to the dielectric constants mismatch is much stronger than the interaction potential that does not take such a mismatch into account.Also,it is demonstrated that the binding energies are increasing with the number of impurities.We calculate the canonical partition function using the energy levels of the electron,which in turn is used to obtain the mean energy,heat capacity,and entropy of the non-interacting electron gas.The thermodynamic properties of the non-interacting electron gas that depend on the geometric parameters of the NPL,impurity number,configuration,and temperature are studied.
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