Sökning: "Quantum Optics"

Visar resultat 41 - 45 av 236 avhandlingar innehållade orden Quantum Optics.

1. 41. Ensembles and Open Quantum Systems in Polaritonic Chemistry

   Författare :Eric Davidsson; Markus Kowalewski; Gerrit Groenhof; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polaritonic Chemistry; Open Quantum Systems; Cavity QED; The Jaynes-Cummings Model; Optical Cavities; Computational Quantum Dynamics; Theoretical Physics; teoretisk fysik;

   Sammanfattning : Optical cavities are structures where excitations in the electromagnetic field (photons of light) are confined and generally long-lived. The spatial confinement will enhance interactions with any matter systems in the cavity, such that the behaviour of a combined system is best understood in terms of polaritonic states; mixtures of excitations in both light and matter. LÄS MER

3. 42. Generation, Detection and Application of Single Photons

   Författare :Per Jonsson; KTH; []
   Nyckelord :photonics; quantum optics; single photons; quantum dots; dye molecules; single-photon detection; quantum key distribution;

   Sammanfattning : .... LÄS MER

4. 43. Studies in the Geometry of Quantum Measurements

   Författare :Irina Dumitru; Ingemar Bengtsson; David Gross; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; quantum measurements; Bell nequalities; Weyl-Heiseberg group; device-independent certification; symmetric informationally-complete POVM; teoretisk fysik; Theoretical Physics;

   Sammanfattning : Quantum information studies quantum systems from the perspective of information theory: how much information can be stored in them, how much the information can be compressed, how it can be transmitted. Symmetric informationally-Complete POVMs are measurements that are well-suited for reading out the information in a system; they can be used to reconstruct the state of a quantum system without ambiguity and with minimum redundancy. LÄS MER

5. 44. Towards measuring quantum sound

   Författare :Maria Ekström; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; surface acoustic wave; interdigital transducer; artificial atom; qubit; superconducting circuits; cryogenic temperature; phonon; gigahertz frequency; quantum acoustics; unidirectional transducer;

   Sammanfattning : One of the most fundamental phenomena occurring in nature is the interaction between single atoms and electromagnetic fields. This is studied in quantum optics to probe the quantum nature of the system. In appended Paper I, we demonstrated that an artificial atom can couple to propagating sound, which is the acoustic analogue of quantum optics. LÄS MER

7. 45. Quantum dynamical effects in complex chemical systems

   Författare :S. Karl-Mikael Svensson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Quantum dynamics; Radiative association; Classical Wigner method; Feynman path integral; Reaction rate constants; Wigner phase space;

   Sammanfattning : When using mathematical models to computationally investigate a chemical system it is important that the methods used are accurate enough to account for the relevant properties of the system and at the same time simple enough to be computationally affordable. This thesis presents research that so far has resulted in three published papers and one unpublished manuscript. LÄS MER