2003/10/09 by Ulrich Hohenester, Claudia Sifel, Pekka Koskinen · 1 citation
Chemistry · Computer Science · Physics and Astronomy · #Biexciton #Cascade #Chemistry #Coherence (philosophical gambling strategy) #Electron #Exciton #Fine structure #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum decoherence #Quantum dot #Quantum entanglement #Quantum mechanics #Quantum tunnelling #Scattering #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.68.245304
13 pages; to appear in Phys. Rev. B
arxiv created 2003/10/09 · openalex publication_date 2003/12/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We employ the quantum-jump approach to study single scatterings in single semiconductor quantum dots. Two prototypical situations are investigated. First, we analyze two-photon emissions from the cascade biexciton decay of a dot where the single-exciton states exhibit a fine-structure splitting. We show that this splitting results for appropriately chosen polarization filters in an oscillatory behavior of two-photon correlations, and carefully examine the proper theoretical description of the underlying scattering processes. Second, we analyze the decay of a single-electron charged exciton in a quantum dot embedded in a field-effect structure. We show how the quantum properties of the charged exciton are transferred through tunneling and relaxation to the spin entanglement between electrons in the dot and contact, and identify the pertinent disentanglement mechanisms.