We present here a detailed analysis of the mechanism of photoinduced electron and proton transfer in the planar pyrrole-pyridine hydrogen-bonded system, a model for the photochemistry of hydrogen bonds in DNA base pairs. Two different crossings, an avoided crossing and a conical intersection, are the key steps for forward and backward electron and proton transfer providing to the system photost...

We present a theoretical analysis of light scattering from a layered metal-dielectric microsphere. The system consists of two spherical resonators coupled through concentric embedding. Solving for the modes of this system, we find that near an avoided crossing the scattering cross section is dramatically suppressed, exhibiting a tunable optical transparency. Similar to electromagnetically induc...

Surface hopping algorithms are popular tools to study dynamics of the quantum-classical mixed systems. In this paper, we propose a surface hopping algorithm in diabatic representations, based on time dependent perturbation theory and semiclassical analysis. The algorithm can be viewed as a Monte Carlo sampling algorithm on the semiclassical path space for piecewise deterministic path with stoch...

We investigate controlled collisions between trapped but separated ultracold atoms. The interaction between atoms is treated self-consistently using an energy-dependent delta-function pseudopotential model, whose validity we establish. At a critical separation, a "trap-induced shape resonance" between molecular bound states and a vibrational eigenstate of the trap can occur. This resonance lead...

In article number 2100029, Bingsheng Tu and co-workers present a novel scheme that allows to efficiently cool arbitrary ions by coupling them directly laser cooled ion in separate Penning trap. The authors' results demonstrate how common tank circuit can drastically enhance the coupling, resulting expected avoided-crossing behavior of two ions. This technique holds promise enable millikelvin co...

Two-center level diagrams for the neutron orbitals in the scattering of '60 on "Mg and of "0 on 24Mg are calculated by using a deformed potential for 24,25Mg. Possible consequences of the nuclear Landau-Zener mechanism, namely the promotion of nucleons at avoided level crossings, and of the rotational coupling between crossing molecular singleparticle orbitals are studied for inelastic excitati...

We report measurements of the quantum Hall state energy gap at avoided crossings between Landau levels originating from different conduction band valleys in AlAs quantum wells. These gaps exhibit an approximately linear dependence on the magnetic field over a wide range of fields and filling factors. More remarkably, we observe an unexpected dependence of the gap size on the relative spin orien...

Roads are a major cause of habitat fragmentation that can negatively affect many mammal populations. Mitigation measures such as crossing structures are a proposed method to reduce the negative effects of roads on wildlife, but the best methods for determining where such structures should be implemented, and how their effects might differ between species in mammal communities is largely unknown...

The coupling of the motion two ion species in separate Penning traps via a common tank circuit is discussed. enhancement assisted by demonstrated an avoided crossing behavior measurement motional modes coupled ions. An intermittent laser cooling method for sympathetic proposed and theoretical description provided. technique enables tuning strength between thus allows efficient arbitrary type si...