If at least some Wheeler-DeWitt solutions can be interpreted as zero-energy resonances then the total s-wave cross section of the corresponding quantum universes is infinite. The present, common 'quantum' cosmological framework is based on the Wheeler-DeWitt equation, which being a 'stationary', zero-energy differential equation appears to have no obvious time dependence and therefore forcing o...

Heavy electronic states originating from the f atomic orbitals underlie a rich variety of quantum phases of matter. We use atomic scale imaging and spectroscopy with the scanning tunneling microscope to examine the novel electronic states that emerge from the uranium f states in URu(2)Si(2). We find that, as the temperature is lowered, partial screening of the f electrons' spins gives rise to a...

Two different types of shape resonance states, π* and σ*, formed in the low-energy electron attachments to the low-lying tautomers of DNA bases (adenine, guanine, thymine, and cytosine) in the gas phase are investigated using the quantum scattering method with the non-empirical model potentials in a symmetry-adapted, single-center expansion. Four and three π* states are predicted for purines an...

To investigate the electromagnetic interaction of molecules inside the nanotubes, first, the structure of nanotubes B16N16 was optimized with hybrid density functional theory (B3LYP) using the EPR-II basis set, then Cu, Cu+, Cu++ were located in nanotube and we studied the total energy, band gap energy, electrical potential, changes of band gap energy in terms of total energy and dipole moment ...

We present quantum mechanical bound-state calculations for HCP(X̃) using an ab initio potential energy surface. The wave functions of the first 700 states, corresponding to energies roughly 23 000 cm above the ground vibrational state, are visually inspected and it is found that the majority can be uniquely assigned by three quantum numbers. The energy spectrum is governed, from the lowest excit...

A Feshbach resonance occurs when the energy of two interacting free particles comes into resonance with a molecular bound state. When approaching this resonance, marked changes in the interaction strength between the particles can arise. Feshbach resonances provide a powerful tool for controlling the interactions in ultracold atomic gases, which can be switched from repulsive to attractive1–4, ...