An attempt to observe Mott scattering optically

New insights into Mott-scattering electron polarimetry.

Tuning the scattering length with an optically induced Feshbach resonance.

We demonstrate optical tuning of the scattering length in a Bose-Einstein condensate as predicted by Fedichev et al. [Phys. Rev. Lett. 77, 2913 (1996)]. In our experiment, atoms in a 87Rb condensate are exposed to laser light which is tuned close to the transition frequency to an excited molecular state. By controlling the power and detuning of the laser beam we can change the atomic scattering...

Phytoplankton of Aras dam reservoir (Iran): an attempt to assess water quality

The Aras reservoir, located in the north-west of Iran, plays an important role in fisheries, drinking and agricultural water supplies and recreational activities in the region. This study was performed to characterize the seasonal fluctuations of phytoplankton communities and their relationship with environmental factors in the Aras reservoir from August 2013 to May 2014. Sampling was carried o...

An Environment to Observe Object-Oriented Software Evolution

Software systems are growing quickly in needs of functionality, complexity, size and structure. Therefore, it becomes necessary to advance the ways where software suffers changes, so it can be modified more easily to accommodate these needs. However, anticipating the changes is not an easy task, once there are a lot of reasons why the systems change. The Laws of Software Evolution describe how ...

Inelastic x-ray scattering in correlated Mott insulators.

We calculate the inelastic light scattering from x rays, which allows the photon to transfer both energy and momentum to the strongly correlated charge excitations. We find that the charge-transfer peak and the low-energy peak both broaden and disperse through the Brillouin zone similar to what is seen in experiments in materials such as Ca2CuO2Cl2.