Dissertation > Excellent graduate degree dissertation topics show

Study of the Exciton-Polaron System in Two-Dimensional Parabolic Quantum Dot by Squeezed States Transformation of Phonons

Author: WangShang
Tutor: ChengZe
School: Huazhong University of Science and Technology
Course: Optics
Keywords: Exciton - phonon systems Phonon squeezed states Two-dimensional parabolic quantum dot Magnetic field
CLC: O413
Type: Master's thesis
Year: 2009
Downloads: 24
Quote: 0
Read: Download Dissertation

Abstract


In the past few decades, research on low- dimensional materials becomes an active area of ??physics . With micro- processing and the development of nanotechnology , it has been possible to make quantum dots due to quantum dot application prospect is very extensive, which makes the study of quantum dots to become one of the hotspots of modern physics . In the first chapter, first of all we excitons were introduced. It mainly introduces the concept and its physical properties. We then polar semiconductor quantum dot research background and current situation are introduced , where we focus on the exciton quantum dots research achievements . Finally, we have to study for this work are described. In the second chapter, first constructed in this paper to study the presence of a magnetic field in the case of two-dimensional parabolic quantum dot model . In the second part , draw the corresponding Hamiltonian and its expansion and simplification . The third part we carry out the corresponding Hamiltonian PPL transformations. The fourth part , we phonon Hamiltonian in the relevant part of the compression transformation processing , and use the method of averaging exciton ground state energy to solve it. The fifth part , we typically polar GaAs semiconductor material , for example, the corresponding values ??of the material parameters are used in the calculation . Finally, we get useful data . The results show that the exciton quantum dots - sound subsystem ground-state energy with quantum dots bound frequency increases. With the magnetic field strength in quantum dots increases, within the exciton quantum dots - sound subsystem ground state energy will be increased . Similarly, while the strength of the interaction with the system increases, the quantum dots within the exciton - phonon systems of the ground state energy decreases. Part VI , we give the excited state wave function and the corresponding energy expression, but due to space limitations do not make specific calculations. The final chapter of this paper , we summarize the main contents of the thesis research , and the results obtained are discussed and analyzed . Meanwhile, we also discussed the article there are still some deficiencies , and made the prospects for future work .

Related Dissertations

  1. Research on Magnetic Field Sensor Based on GMI Effect and Geomagnetic Matching Algorithm,P318
  2. The Influence of Magnetic Field Topology on Electron Motion in Hall Thrusters,V439.2
  3. Measurement and Reconstruction of Ion Channel Current for Cell Membrane in Rat’s Cerebral Cortex,Q42
  4. External magnetic field and optical lattice spinor condensate quantum phase singularity,O469
  5. Magnetic field spin chain entanglement dynamics of particles in both,O413.1
  6. CORS networks based on China's regional ionospheric delay models and their applications,P228.4
  7. The Control Software System Design of Pulsed High Magnetic Field Facility,TP273
  8. Finite Element Analysis of Magnetic Levitation Planar Motor,TM359.9
  9. Single- walled carbon nanotubes in a magnetic field π electron energy band calculations,TB383.1
  10. Longitudinal magnesium alloy AZ91 under AC magnetic field properties of welded joints,TG407
  11. Dry-type air-core reactor temperature field loss and,TM478
  12. Vacuum circuit breaker interrupter structure and mechanism of the new,TM561.5
  13. Based on magnetic grid-type magnetic sets of key technologies proportional solenoid,TM574
  14. Structure OPT Imitation and Experimental Research on Outer Pipeline Multi-magnetize Inspection Structure,TH878.3
  15. The Preliminary Study of Biological Effect of Static Magnetic Field on Hydra Magnipapillata and Dugesia Japonica,X174
  16. Study on Advanced Treatment Technology of Magnetic Field and Ozonation Composite Strengthening Coagulation,X703.1
  17. Preparation of Fe3O4 and Fe3O4 / Chitosan Nanocomposite Induced by Static Magnetic Field,TB383.1
  18. SCB11-1600/10 resin insulation dry-type power transformer R \u0026 D,TM412
  19. Design and Implementation of Mechanical System of CYCHU-10 Magnetic Measurement Device,TL542
  20. Effects of Recombinant Plasmid pEGFP-AFP-TK Delivered by Nano-magnetic Fluids on Targeting Therapy for Implanted Liver Cancer in Nude Mice under Alternating Magnetic Field,R735.7

CLC: > Mathematical sciences and chemical > Physics > Theoretical Physics > Quantum theory
© 2012 www.DissertationTopic.Net  Mobile