Sökning: "Hyperfine Structure"

Visar resultat 1 - 5 av 8 uppsatser innehållade orden Hyperfine Structure.

1. 1. Distortion and attenuation free gain-assisted Superluminal Propagtion in a Rare-Earth Doped Crystal

   Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

   Författare :Antonius Johannes Renders; [2023]
   Nyckelord :Fast Light; Superluminal Propagation; Negative group velocity; Rare earth; Physics and Astronomy;

   Sammanfattning : A light pulse that travels through a narrow spectral window, i.e. a frequency range of low absorption, within a strongly absorbing frequency range will be delayed due to strong dispersion. LÄS MER

3. 2. Measuring the [C II]-to-H I connection in high-redshift absorption-selected galaxies

   Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Gaurav Senthil Kumar; [2022]
   Nyckelord :QSO; Quasar; Black Hole; AGN; Active Galactic Nuclei; DLA; Damped Lyman Alpha; C II; [C II]; H I; Sightline; HST; X-shooter; Spectroscopy; Echelle Spectroscope; Hyperfine transition; Hyperfine; Physics and Astronomy;

   Sammanfattning : HI neutral gas is the basic building block of galaxies. It dictates the star formation rate and hence the metal enrichment rates within high redshift galaxies. HI neutral gas cannot be directly observed beyond z ≈ 0. LÄS MER

4. 3. Towards a high resolution view of infrared line formation

   Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Martin Schmidt Montelius; [2021]
   Nyckelord :Spectroscopy; Near infrared; K giants; Galactic archeaology; Galactic chemical evolution; Abundances; Milky Way; Physics and Astronomy;

   Sammanfattning : Observing in the infrared has many benefits, such as seeing through the interstellar dust in the galaxy, easier use of adaptive optics, and better flux ratios for direct observations of exoplanets. Before the infrared spectral range can be utilised for highly accurate stellar spectroscopy there is a need for a better understanding of both stellar modelling and the atomic physics that go into forming spectral lines. LÄS MER

5. 4. Formation of Eu II spectral features in magnetic chemically peculiar stars

   Master-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

   Författare :Luca Schmidt; [2020]
   Nyckelord :;

   Sammanfattning : The advancing resolution of modern spectrometers uncovers increasingly detailed spectral features in astrophysical observations which can be attributed to properties of the energy structure of the corresponding atomic systems such as fine, hyperfine and Zeeman splitting. At the same time, increasing computational power enables us to include these quantum mechanical interactions on different levels of sophistication in our theoretical atomic structure calculations. LÄS MER

7. 5. Sensitivity of Various Qubit Detection Methods in Pr:Y2SiO5

   Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

   Författare :Vassily Kornienko; [2017]
   Nyckelord :Rare-earth ion quantum computing; Pr:Y2SiO5; Physics and Astronomy;

   Sammanfattning : The long coherence times of the 4f hyperfine levels of rare-earth-ions gives the possibility to use these as quantum computation devices. Moreover after being doped into a crystal the strong dipole-dipole interaction can be utilized to entangle them. Much work has been done here in Lund to attain as many of the DiVincenzo criteria as possible. LÄS MER