We study the influence of boundary conditions on energy levels of interacting fields in a box and discuss some consequences when we change the size of the box. In order to do this we calculate the energy levels of bound states of a scalar massive field χ interacting with another scalar field φ through the lagrangian Lint = 3 2gφ2χ2 in an one-dimensional box, on which we impose Dirichlet boundar...

time-dependent schrödinger equation for a 1-d model of hydrogen molecular ion h2+ in intenselaser field linearly polarized along the molecular axis is solved. ionization rates are calculated for differentinitial states. the evolution of electronic wavefunction at fixed inter-nuclear separations are simulated andanalyzed. the results obtained for the ground state of this 1-d model of h2+ show ap...

We have computed the energy level displacement of the excited np state of kaonic hydrogen within the quantum field theoretic and relativistic covariant model of strong low–energy K̄N interactions suggested in EPJA 21, 11 (2004). For the width of the energy level of the excited 2p state of kaonic hydrogen, caused by strong low–energy interactions, we have got Γ2p = 2meV = 3 × 1012 sec−1. The obta...

We present a statistical mechanical model for the anomalous thermodynamic properties of FCC delta phase plutonium and Pu-Ga alloys. The model is based on the addition of a two-level, “invar”-like, electronic energy structure to the ordinary Debye model for the lattice; there is no assumption of magnetic character of these electronic levels. Along with the usual Debye temperature and lattice Grü...

Spectroscopic constants for the conformers of the 1-alkoxy radicals were computed by ab initio and density functional methods. These parameters include ground and excited state rotational constants, harmonic frequencies, and Ã− X̃ and B̃ − X̃ excitation energies. Elements of the electronic spin-molecular rotation tensor have also been predicted for the ground electronic state utilizing a simple tr...

We report the first vibrationally resolved spectroscopic study of FeO. We observe the 0←0 and 1←0 bands of a S←X S transition at 28 648.7 and 29 311 cm. Under slightly modified source conditions the 1←1 transition is observed at 28 473 cm. In addition to establishing an upper limit D0 (Fe1–O!<342.7 kJ/mol, our results give the first experimental measurements of the vibrational frequencies in bo...

A new supersymmetry method for the generation of the quasi-exactly solvable (QES) potentials with two known eigenstates is proposed. Using this method we obtained new QES potentials for which we found in explicit form the energy levels and wave functions of the ground state and first excited state.

We present a high-resolution analysis of the six electronic states that share the same dissociation limit with the second excited electronic state B in molecular iodine. These six states are coupled to the B state via hyperfine interactions. The four hyperfine parameters, CB, B, dB, and eqQB, are calculated with the available potential energy curves and wave functions constructed from the separ...

A first glance the title of this project may seem very strange. How can we control the properties of a quantum particle by simply squeezing a crystal? Electron or nuclear spins can be trapped in defects such as vacancies in a crystal structure. This of course is a “particle in a box”, and if we change the shape of the box by squeezing the crystal we can change the energy levels of the particle....