Sökning: "Matematisk och allmän teoretisk fysik"
Visar resultat 21 - 25 av 37 avhandlingar innehållade orden Matematisk och allmän teoretisk fysik.
21. Quantum Chaos and Dissipation in Finite Fermi Systems
Sammanfattning : We address the problem of the dissipative character of collective motion in finite Fermi systems. We study this problem from the point of view of chaotic features of the fermionic degrees of freedom of the many-body Fermi systems. LÄS MER
22. Resonant Tunneling in Laterally Confined Quantum Structures
Sammanfattning : In the thesis, three-dimensionally confined resonant tunneling structures were studied experimentally. Two approaches were used for obtaining quantum confinement: gate-defined lateral constriction of double barrier structures, and epitaxial growth of self-assembled quantum dots. LÄS MER
23. Phase Transitions in Large Oscillator Lattices
Sammanfattning : This thesis deals with large networks of limit cycle oscillators. A limit cycle oscillator is a dynamical system that has a periodic attractor in phase space, and is defined in continuous time. To each such oscillator one can associate a natural frequency. LÄS MER
24. Thermoelectric phenomena in low-dimensional semiconductor systems
Sammanfattning : This thesis investigates thermoelectric effects, predominantly in low-dimensional semiconductors. Various novel phenomena are predicted, investigated and discussed. LÄS MER
25. Resonant states in modulation-doped heterostructures
Sammanfattning : This thesis deals with the properties of donors placed inside or outside a heterostructure quantum well (QW). The focus of the investigation has been on the formation of resonant states, which are a hybridization of the discrete localized impurity levels and the continuous two-dimensional QW subbands. LÄS MER
