Microscopic Structure of Shocks and Antishocks in the ASEP Conditioned on Low Current

We study the time evolution of the ASEP on a one-dimensional torus with L sites, conditioned on an atypically low current up to a finite time t. For a certain one-parameter family of initial measures with a shock we prove that the shock position performs a biased random walk on the torus and that the measure seen from the shock position remains invariant. We compute explicitly the transition rates of the random walk. For the large scale behavior this result suggests that there is an atypically low current such that the optimal density profile that realizes this current is a hyperbolic tangent with a traveling shock discontinuity. For an atypically low local current across a single bond of the torus we prove that a product measure with a shock at an arbitrary position and an antishock at the conditioned bond remains a convex combination of such measures at all times which implies that the antishock remains microscopically stable under the locally conditioned dynamics. We compute the coefficients of the convex combinations.     

90Mo电磁跃迁几率的测量

利用束流能量为116MeV的⁵⁹Co(³⁵Cl,2p2n)⁹⁰Mo反应布居⁹⁰Mo的高自旋态.用10台反康普顿HPGe探测器组成的探测阵列进行γγ符合测量.通过多普勒展宽峰的形状分析测定⁹⁰Mo高自旋态的寿命.在正宇称衰变系观察到增强的M1跃迁,推断I=13以上是扁椭形变.负宇称高自旋态具有大的B(E2)值,并随自旋增大而起伏变化.正、负宇称态之间的跃迁显示增大的E1跃迁,似有八极关联的可能.但是,⁹⁰Mo并不处在理论预言的存在八极形变的核区内.     

Energies,Wavelengths, and Transition Probabilities in Sc XIII

Physics of Atomic Nuclei - The fine-structure energy levels and lifetimes are calculated for the lowest 218 levels of the 2s22p5, 2s2p6, 2s22p43s, 2s22p43p, 2s22p43d, 2s2p53s, 2s2p53p, 2s2p53d,...     

Transition Probabilities of the Bethe Ansatz Solvable Interacting Particle Systems

This paper presents the exact expressions of the transition probabilities of some non-determinantal Bethe ansatz solvable interacting particle systems: the two-sided PushASEP, the asymmetric avalanche process and the asymmetric zero range process. The time-integrated currents of the asymmetric avalanche process and the asymmetric zero range process are immediate from the results of the asymmetric simple exclusion process.     

Absolute Transition Probabilities and Oscillator Strengths for Kr II Transitions

Absolute transition probabilities and oscillator strengths for 28 lines belonging to Kr II spectrum were measured. The lines were obtained in a highly repetitive pulsed source where a capillar tube (3 mm internal diameter, 80 cm long) is crossed by a high current pulse (700 to 1600 A). Relative transitions probabilities are obtained after measurement of peak intensities and Stark line widths, using a simple relation. Absolute A_ij values were determined by using experimental values of the lifetime of the level 5p ⁴D_7/2 >.     

Hidden Measurements,Hidden Variables and the Volume Representation of Transition Probabilities

We construct, for any finite dimension n, a new hidden measurement model for quantum mechanics based on representing quantum transition probabilities by the volume of regions in projective Hilbert space. For n=2 our model is equivalent to the Aerts sphere model and serves as a generalization of it for dimensions n . 3 We also show how to construct a hidden variables scheme based on hidden measurements and we discuss how joint distributions arise in our hidden variables scheme and their relationship with the results of Fine [J. Math. Phys. 23 1306 (1982)].     

QED Theory of Transition Probabilities and Line Profiles in Highly Charged Ions

A rigorous QED theory of the spectral line profiles is applied to transition probabilities in few-electron highly charged ions. Interelectron interaction corrections are included as well as radiative corrections. Parity nonconserving (PNC) amplitudes with effective weak interactions between the electrons and nucleus are also considered. QED and interelectron interaction corrections to the PNC amplitudes are derived.     

Effect of Quark Strong Interaction in Phase Transition on Supernova Explosion

The effect of quark interactions perturbatively to order αc on the conversion, from quark matter to strange quark matter, is studied systematically based on a recent set of current quark masses. The process has a significant effect on increasing the core temperature, the neutrino abundance and the neutrino energies even if there is no quark interaction. Furthermore, with the switch of the strong interaction among quarks, these quantities will increase respectively to some further extents with αc increase. Taking αc = 0.47 as an example, the temperature, the neutrino abundance and the total neutrino energies are further raised by about 10%, 7%, and 20% respectively, which is weakly dependent on the initial temperature. Combining the effect of the current quark mass and the effect of the quark strong interaction, the results of the conversions will greatly enhance the probability of success for a supernova explosion and deeply influence the dynamics of the supernova evolution.     

Defect Formation in a Dynamic Transition

When a system that undergoes a continuous phase transition is swept through its critical point the initial symmetry is broken and domains are formed. Because of critical slowing down it is not possible to sweep adiabatically; the number of domains therefore depends on the rate of increase of the critical parameter. We give a summary of recent theoretical results for the number of defects produced as a function of how rapidly the transition point is passed. They are obtained from a simplified model, using a stochastic partial differential equation that is also solved numerically.     

Relaxation Times in the ASEP Model Using a DMRG Method

We compute the largest relaxation times for the totally asymmetric exclusion process (TASEP) with open boundary conditions with a DMRG method. This allows us to reach much larger system sizes than in previous numerical studies. We are then able to show that the phenomenological theory of the domain wall indeed predicts correctly the largest relaxation time for large systems. Besides, we can obtain results even when the domain wall approach breaks down, and show that the KPZ dynamical exponent z=3/2 is recovered in the whole maximal current phase.     

Dynamic Transition in a Two-Component Fluid in the Supercooled State

A mode-coupling model has been proposed to study the dynamics of a dense binary fluid. The present model includes a correct set of slow variables, which are consistent with the corresponding conservation laws. From the equations of fluctuating hydrodynamics for slow variables, a coupled set of nonlinear equations for various time-dependent correlations of density fluctuations are obtained. In the long-time limit, a self-consistent solution of these equations shows a dynamic transition, which occurs at a much higher density than predicted by the other existing models for the same systems. Our model brings the theoretical prediction for dynamic transition in better agreement with the simulation results for these systems. We have considered a hard sphere binary mixture to make a direct comparison of our results with the predictions of models studied in earlier works.     

Nuclear Effect on the Nucleon Structure Function

The overlap and the leakage of the parton was considered so that the nucleon effective mass can be successfully used as the only free parameter to adjust the structure function ratios recently measured by NMC.     

Berry's Phases of the Alkali Atom in a SlowlyChanging Strong Magnetic Field and Non-Adiabatic Transition

In this paper the high-order adiabatic approximation (HOAA) method is formulated in a new form ko that the calculation is greatly simplified. using this improved HOAA method, we study the Berry phase effects of the Alkali atom in a slowly-changing strong magnetic field and also the non-adiabatic transitions between the instantaneous angular momentum states. The possible observability is also pointed out.     

Transition Probabilities Among Fock States of an Ion in Harmonic Trap due to Alternating Electric Field

In this paper, we derive the exact analytical expressions of the transition probabilities among the Fock states of an ion in a harmonic trap due to the presence of an alternating electric field.     

Transition Probabilities Among Fock States of an Ion in Harmonic Trap due to Alternating Electric Field

In this paper, we derive the exact analytical expressions of the transition probabilities among the Fock states of an ion in a harmonic trap due to the presence of an alternating electric field.     

Theoretical Calculations of Thermal Broadenings and Transition Probabilities of R,R' and B Line-Groups for Ruby

On the basis of the unified calculation of the thermal shifts of R₁ line, R₂ line and ground-state-splitting transition probabilities of direct and Raman processes have theoretically been calculated. The thermal broadenings of R, R'and B line-groups for ruby, by taking into account all the levels and admixtures of wavefunctions within d³ electronic configuration and all the ΓM in electron-phonon interaction,the transition probabilities of direct and Raman processes have theoretically been calculated, The thermal broadenings of R,R' and B line-groups have successfully been interpreted in terms of the direct and Raman processes of acoustic phonons. The theoretically predicted transition probabilities are in good agreement with the experimental ones.     

Electronic Structure of Quantum Wire in the Strong Magnetic Field

Russian Physics Journal -