Effect of the nearby levels on the resonance fluorescence spectrum of the atom-field interaction

We study the resonance fluorescence in the Jaynes-Cummings model when nearby levels are taking into account. We show that the Stark shift produced by such levels generates a displacement of the peaks of the resonance fluorescence due to an induced effective detuning and also induces an asymmetry. Specific results are presented assuming a coherent and a thermal fields

Recovering coherence from decoherence: a method of quantum state reconstruction

We present a feasible scheme for reconstructing the quantum state of a field prepared inside a lossy cavity. Quantum coherences are normally destroyed by dissipation, but we show that at zero temperature we are able to retrieve enough information about the initial state, making possible to recover its Wigner function as well as other quasiprobabilities. We provide a numerical simulation of a Schroedinger cat state reconstruction.Comment: 8 pages, in RevTeX, 4 figures, accepted for publication in Phys. Rev. A (november 1999

Orbital M1 versus E2 strength in deformed nuclei: A new energy weighted sum rule

Within the unified model of Bohr and Mottelson we derive the following linear energy weighted sum rule for low energy orbital 1$^+$ excitations in even-even deformed nuclei S_{\rm LE}^{\rm lew} (M_1^{\rm orb}) \cong (6/5) \epsilon (B(E2; 0^+_1 \rightarrow 2_1^+ K=0)/Z e^2^2) \mu^2_N with B(E2) the E2 strength for the transition from the ground state to the first excited state in the ground state rotational band, $$ the charge r.m.s. radius squared and $\epsilon$ the binding energy per nucleon in the nuclear ground state. It is shown that this energy weighted sum rule is in good agreement with available experimental data. The sum rule is derived using a simple ansatz for the intrinsic ground state wave function that predicts also high energy 1$^+$ strength at 2$\hbar \omega$ carrying 50\% of the total $m_1$ moment of the orbital M1 operator.Comment: REVTEX (3.0), 9 pages, RU924

Effect of Knife Wear on the Gluability of Planed Surfaces of Radiata Pine

The objectives of this study were to evaluate the effect of knife wear on the gluability of planed surfaces of radiata pine. A conventional process was used to plane samples to four lengths: 200; 10,000; 20,000; and 30,000 m. Cutting-edge recession was measured on the clearance surface of the planing knife for each length. The gluing properties of the planed surfaces were determined for each of the four levels of knife wear using polyvinyl acetate and emulsion polymer isocyanate adhesives. The results showed that the greatest amount of cutting-edge recession on the clearance surface was 65 μm after 30,000 m of planing. The tensile shear strength (TSS) of the lap-joint glue line decreased with knife wear from increased planing. However, TSS was generally greater than the minimum prescribed by the BS EN 204 standard. The effect of knife wear on TSS was more significant after accelerated aging of the glued samples