We measure inelastic three-body and two-body collisional decay rates for a two-component Fermi gas of 6Li, which are highly suppressed by the Pauli exclusion principle. Our measurements are made in the BEC-BCS crossover regime, near the two-body collisional (Feshbach) resonance. At high temperature (energy) the data show a dominant three-body decay process, which is studied as a function of bia...

We investigate L1(R2) → L∞(R2) dispersive estimates for the Schrödinger operator H = −∆+V when there are obstructions, resonances or an eigenvalue, at zero energy. In particular, we show that the existence of an s-wave resonance at zero energy does not destroy the t−1 decay rate. We also show that if there is a p-wave resonance or an eigenvalue at zero energy then there is a time dependent oper...

We calculate the virtual and bremsstrahlung fermionic corrections due to the interference of the electroand chromomagnetic dipole operators in the inclusive B̄ → Xsγ decay at O(αs) and present analytical results for both the total decay rate and the photon energy spectrum.

The paper presents sufficient conditions of predictability for continuous time processes in deterministic setting. We found that processes with exponential decay on energy for higher frequencies are predictable in some weak sense on some finite time horizon defined by the rate of decay. Moreover, this predictability can be achieved uniformly over classes of processes. Some explicit formulas for...

Decaying homogeneous isotropic turbulence in inertial and rotating reference frames is investigated to evaluate the capability of the lattice Boltzmann method in turbulence. In the inertial frame case, the decay exponents of kinetic energy and dissipation and the low wave-number scaling of the spectrum are studied. The results are in agreement with classical ones. In the frame-rotation case, si...

The intrinsic decay rate of orthopositronium formed in SiO2 powder is measured using the direct 2γ correction method such that the time dependence of the pick-off annihilation rate is precisely determined. The decay rate of orthopositronium is found to be 7.0396 ± 0.0012(stat.) ± 0.0011(sys.)μs, which is consistent with our previous measurements with about twice the accuracy. Results agree well...

Much work has been done in the past few years on the problem of the nonradiative decay of single vibronic states in isolated molecules [1,2]. Less attention has been paid to the radiative decay of these levels. Usually rhe nonradiative decay rate is obtained from combined lifetime and quantum yield data. Quantum yields in the gas phase are extremely difficult to determine and large uncertaintie...

In bacterial photosynthetic reaction centers, ultrafast singlet excited-state energy transfer occurs from the monomeric bacteriochlorophylls, B, and bacteriopheophytins, H, to the homodimer special pair, P, a pair of strongly interacting bacteriochlorophylls. Using fluorescence upconversion spectroscopy, energy transfer to the special pair can be monitored by observing the decay of B emission a...