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In this thesis, the dominant decoherence mechanisms of an electron spin qubit confined in an InGaAs quantum dot are identified using optical pump-probe spectroscopy. It is shown that at low magnetic fields the coherence time of the electron spin is reduced by combined effects of hyperfine and quadrupolar coupling. By employing higher-order spin correlators it is show that quantum phenomena are maintained up to microsecond timescales at magnetic fields exceeding the quadrupolar coupling strength.
Nákup knihy
Quantum dynamics of spin qubits in optically active quantum dots, Alexander Bechtold
- Jazyk
- Rok vydania
- 2017
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- Titul
- Quantum dynamics of spin qubits in optically active quantum dots
- Jazyk
- anglicky
- Autori
- Alexander Bechtold
- Vydavateľ
- Verein zur Förderung des Walter Schottky Instituts der Technischen Universität München e.V.
- Rok vydania
- 2017
- ISBN10
- 3946379001
- ISBN13
- 9783946379003
- Kategórie
- Skriptá a vysokoškolské učebnice
- Anotácia
- In this thesis, the dominant decoherence mechanisms of an electron spin qubit confined in an InGaAs quantum dot are identified using optical pump-probe spectroscopy. It is shown that at low magnetic fields the coherence time of the electron spin is reduced by combined effects of hyperfine and quadrupolar coupling. By employing higher-order spin correlators it is show that quantum phenomena are maintained up to microsecond timescales at magnetic fields exceeding the quadrupolar coupling strength.