Essays about: "Ultra cold atoms"

Found 3 essays containing the words Ultra cold atoms.

1. 1. Microscopic and Macroscopic Samples of Atoms in Superposition States Studied by Attosecond Pulses

   University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

   Author : Axel Stenquist; [2021]
   Keywords : Mathematical physics; Theoretical physics; Atomic physics; Attosecond physics; Ultra-fast physics; Numerical simulations; Microscopic; Mesoscopic; Macroscopic; Superposition; Light matter interaction; Quantum mechanics; Electromagnetism; Semiclassical; Attosecond transient absorption spectroscopy; ATAS; Förster resonance; FRET; Two-atom model; Inter-atomic interaction; Dipole-dipole interaction; Many-atom model; Collective coherent effects; Time-dependent configuration-interaction singles; TDCIS; Physics and Astronomy;

   Abstract : In the present thesis, the interaction between atoms in superposition states and attosecond pulses is studied from the microscopic to the macroscopic regime. Using a semi-classical framework, three different models have been explored in order to investigate attosecond light--matter interaction processes. READ MORE

3. 2. Many-body-based DFT treatment of fermions in optical lattices

   University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk fysik

   Author : Jérémie Westergren; [2017]
   Keywords : DFT; density functional theory; MBA; many-body approximations; Hubbard model; Ultra cold atoms; cold atoms; optical lattice; Physics and Astronomy;

   Abstract : With recent advances in the field of ultra cold atoms one can, by trapping atoms at low temperatures by laser beams, simulate systems which can be adequately described by single-band lattice Hamiltonians. Also, due to the high parameter tunability of the experimental setups, lattice disorder can be introduced in a con- trolled fashion in these systems. READ MORE

4. 3. Designing an Experiment to Investigate Slow Light Effects in Whispering Gallery Mode Resonators

   University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

   Author : Karolina Dorozynska; [2015]
   Keywords : Slow light; Whispering Gallery Mode Resonator; WGMR; Atomic physics; Physics and Astronomy;

   Abstract : Slow light and Whispering Gallery Mode Resonators are two interesting and useful fields with applications in optical sensing and laser stabilisation among others. Slow light can lead to long interaction times which are useful in light-matter interactions such as sensitive non-linear optics. READ MORE