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Spin and Photon Coherence and Entanglement in Semiconductor Quantum Dots
| Content Provider | Semantic Scholar |
|---|---|
| Author | Welander, Erik |
| Copyright Year | 2014 |
| Abstract | The aim of this thesis is to theoretically investigate two possible applications of semiconductor quantum dots for the growing field of quantum information and communication. The first one is the generation of entangled photons, which can be created by the radiative recombination of a quantum dot biexciton. This non-classical state of light is for instance used for teleportation of quantum information over distance. Although other methods of creating entangled photons exist, they suffer from problems such as inefficiency and unreliability, and an alternative which can produce an entangled photon pair on-demand within a given time interval would be most welcome. The second application is the implementation of a quantum bit using the intrinsic angular momentum of a single electron confined to a quantum dot. The quantum bit is the basic element of any quantum computer and is used to store quantum information. The work is divided into four main parts. We begin with an introduction which contains a short description about entanglement and quantum information followed by a brief review about the electron structure of semiconductors. This review aims to provide knowledge about some key methods and results from the semiconductor physics, which we will need in the following chapters. In the second part we will turn our attention to the generation of entangled light by the recombination of semiconductor biexcitons, which are composed of two excitons. We will discover that the excitons show an energy structure which requires extending the semiconductor theory from the |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://kops.uni-konstanz.de/bitstream/handle/123456789/28880/Welander_288807.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
