We investigate strongly interacting atomic Fermi-Bose mixtures in inhomogeneous and random optical lattices. We derive an effective Hamiltonian for the system and discuss its low temperature physics. We demonstrate the possibility of controlling the interactions at local level in inhomogeneous but regular lattices. Such a control leads to the achievement of Fermi glass, quantum Fermi spin-glass...

Very recently the atomic masses of neutron-rich Zr isotopes, from Zr to Zr, have been measured with high precision. Using a schematic Interacting Boson Model (IBM) Hamiltonian, the evolution from spherical to deformed shapes along the chain of Zr isotopes, describing at the same time the excitation energies as well as the two-neutron separation energies, can be rather well reproduced. The inter...

We extend an earlier canonical formulation of quantum electrodynamics in the infinite--momentum frame by replacing the photons by massive vector mesons. The structure of the theory remains nearly the same except that a new term appears in the infinite-momentum Hamiltonian describing the emission of helicity zero vector mesons with an amplitude proportional to the meson mass. (Submitted to Phys....

Using a scattering technique based on a parametrized linear combination of atomic orbitals Hamiltonian, we calculate the ballistic quantum conductance of multiwall carbon nanotubes. We find that interwall interactions not only block some of the quantum conductance channels, but also redistribute the current nonuniformly over individual tubes across the structure. Our results provide a natural e...

We present calculations for the temperature-dependent electronic structure of bulk ferromagnetic EuO based on a parametrization of the d-f model Hamiltonian using results of first-principles TB-LMTO band structure calculations. The presented method avoids the problem of double-counting of relevant interactions and takes into account the symmetry of the atomic orbitals. It enables us to determin...

Quantum melting of spin ice is proposed for pyrochlore-lattice magnets Pr2TM2O7 (TM=Ir, Zr, and Sn). The quantum superexchange Hamiltonian having a nontrivial magnetic anisotropy is derived on the basis of atomic non-Kramers magnetic doublets. The ground states exhibit a cooperative ferroquadrupole and pseudospin chirality, forming a magnetic analog of smectic liquid crystals. Our theory accoun...

When structures that interconvert on a given time scale are lumped together, the corresponding free-energy surface becomes a function of the observation time. This view is equivalent to grouping structures that are connected by free-energy barriers below a certain threshold. We illustrate this time dependence for some benchmark systems, namely atomic clusters and alanine dipeptide, highlighting...

An electric field partly lifts the degeneracies of atomic energy levels. This splitting was observed by Stark [1] and explained by Schrödinger [2]. We compute the Stark effect on atomic hydrogen using perturbation theory by diagonalizing the perturbation term in the N-fold degenerate multiplet of states with principal quantum number N . We exploit the symmetries of this problem to simplify the ...

In this paper, we present a theoretical scheme for the generation and manipulation of bipartite atom–atom entanglement in dissipative optomechanical system containing two atoms presence linear nonlinear (quadratic) couplings. To achieve goal first obtain interaction Hamiltonian picture, then, by considering some resonance conditions applying rotating wave approximation, effective Hamiltonian, w...

We introduce a dynamical system that instead of exchanging single photon as in the atomic usual Jaynes-Cummings model (JCM), it exchanges squeezed coherent photon. Accordingly, creation and annihilation operators JCM are replaced by states, respectively. This transformation generates Hamiltonian modifies includes terms usually omitted when making rotating-wave approximation and, addition, intro...