Sample interview questions: Can you describe a specific research project you have worked on in atomic physics?
Sample answer:
One specific research project I have worked on in atomic physics involved investigating the behavior of ultracold atoms confined in an optical lattice. The goal was to understand the quantum dynamics and properties of these atoms when subjected to external perturbations and interactions.
To begin, we created a setup that allowed us to trap and cool a cloud of atoms using laser cooling techniques. By carefully controlling the laser parameters, we were able to cool the atoms to temperatures close to absolute zero, resulting in an ultracold ensemble of atoms.
Next, we employed an optical lattice, which is essentially a standing wave of light formed by overlapping laser beams. This lattice acted as a periodic potential for the atoms, confining them in an array of potential wells. By adjusting the intensity and wavelength of the lasers, we could control the lattice spacing and depth.
Once the atoms were trapped in the optical lattice, we studied their behavior under various experimental conditions. For example, we investigated the effects of external fields on the atoms’ energy levels and observed how the lattice potential modified their electronic structure. This allowed us to probe the fundamental interactions between atoms in a controlled environment.
Furthermore, we explored the dynamics of the ultracold atoms within the lattice. By applying a time-varying potential, such as a shaking of the lattice or a modulation of the laser intensities, we induced coherent oscillations of the atomic cloud. We analyzed the resulting dynamics to extract information about the atoms’ interaction strengt… Read full answer