We theoretically investigate the formation of W states in a tripartite system composed three charge qubits coupled to vibrational modes. The electromechanical coupling is responsible for second-order virtual processes that result an effective electron-electron interaction between neighbor qubits, which leads states. Based on Lang-Firsov transformation and perturbation theory, we analytically so...

Transitions from normal-mode to local-mode states in the two bending oscillations of acetylene observed in spectroscopic studies, as well as the existence of localized vibrational states in vinylidene above the isomerization barrier to acetylene, are examined by constructing continuation/ bifurcation diagrams of periodic orbits on a global potential-energy surface. The principal families of per...

Vibrational (J = 0) states for the KCN molecule are calculated in Jacobi coordinates, employing a discrete variable representation (DVR) for the angular internal coordinate. The power of the DVR method is once again illustrated in that some 800 vibrational (J = 0) states are converged for a two-dimensional potential-energy surface. The energy region studied is that where the classical dynamics ...

We describe a method to obtain absolute vibrational excitation probabilities of molecules scattering from a surface based on measurements of the rotational state, scattering angle, and temporal distributions of the scattered molecules and apply this method to the vibrational excitation of NO scattering from Au(111). We report the absolute excitation probabilities to the v = 1 and v = 2 vibratio...

We control the quantum mechanical motion of neutral atoms in an optical lattice by driving microwave transitions between spin states whose trapping potentials are spatially offset. Control of this offset with nanometer precision allows for adjustment of the coupling strength between different motional states, analogous to an adjustable effective Lamb-Dicke factor. This is used both for efficien...

In photosynthesis absorbed sun light produces collective excitations (excitons) that form a coherent superposition of electronic and vibrational states of the individual pigments. Two-dimensional (2D) electronic spectroscopy allows a visualization of how these coherences are involved in the primary processes of energy and charge transfer. Based on quantitative modeling we identify the exciton-v...

Raman gain for all-optical amplification depends significantly on the cross section for spontaneous Raman scattering. We present measurements of the Raman spectrum of binary niobium-phosphate glasses in the frequency range from 5 – 1300 cm. The spectra of these glasses show a low-frequency enhancement of the vibrational density of states (‘Boson peak’) suggesting a significant gain profile for ...