Spins In Optically Active Quantum Dots

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Spins In Optically Active Quantum Dots

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Author : Oliver Gywat
language : en
Publisher: John Wiley & Sons
Release Date : 2010-02-01

Spins In Optically Active Quantum Dots written by Oliver Gywat and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-02-01 with Technology & Engineering categories.

Filling a gap in the literature, this up-to-date introduction to the field provides an overview of current experimental techniques, basic theoretical concepts, and sample fabrication methods. Following an introduction, this monograph deals with optically active quantum dots and their integration into electro-optical devices, before looking at the theory of quantum confined states and quantum dots interacting with the radiation field. Final chapters cover spin-spin interaction in quantum dots as well as spin and charge states, showing how to use single spins for break-through quantum computation. A conclusion and outlook round off the volume. The result is a primer providing the essential basic knowledge necessary for young researchers entering the field, as well as semiconductor and theoretical physicists, PhD students in physics and material sciences, electrical engineers and materials scientists.

Towards Solid State Quantum Repeaters

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Author : Kristiaan De Greve
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-16

Towards Solid State Quantum Repeaters written by Kristiaan De Greve and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-16 with Computers categories.

Towards Solid-State Quantum Repeaters: Ultrafast, Coherent Optical Control and Spin-Photon Entanglement in Charged InAs Quantum Dots summarizes several state-of-the-art coherent spin manipulation experiments in III-V quantum dots. Both high-fidelity optical manipulation, decoherence due to nuclear spins and the spin coherence extraction are discussed, as is the generation of entanglement between a single spin qubit and a photonic qubit. The experimental results are analyzed and discussed in the context of future quantum technologies, such as quantum repeaters. Single spins in optically active semiconductor host materials have emerged as leading candidates for quantum information processing (QIP). The quantum nature of the spin allows for encoding of stationary, memory quantum bits (qubits), and the relatively weak interaction with the host material preserves the spin coherence. On the other hand, optically active host materials permit direct interfacing with light, which can be used for all-optical qubit manipulation, and for efficiently mapping matter qubits into photonic qubits that are suited for long-distance quantum communication.

Nuclear Spin Phenomena In Optically Active Semiconductor Quantum Dots

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Author : Julia Hildmann
language : en
Publisher:
Release Date : 2014

Nuclear Spin Phenomena In Optically Active Semiconductor Quantum Dots written by Julia Hildmann and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

Quantum Dynamics Of Spin Qubits In Optically Active Quantum Dots

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Author : Alexander Bechtold
language : en
Publisher:
Release Date : 2017

Quantum Dynamics Of Spin Qubits In Optically Active Quantum Dots written by Alexander Bechtold and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.

Quantum Optical Control Of Spins And Excitons In Semiconductor Quantum Dots

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Author : Pochung Chen
language : en
Publisher:
Release Date : 2002

Quantum Optical Control Of Spins And Excitons In Semiconductor Quantum Dots written by Pochung Chen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.

Optically Controlled Quantum Dot Spins For Scaleable Quantum Computing

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Author :
language : en
Publisher:
Release Date : 2005

Optically Controlled Quantum Dot Spins For Scaleable Quantum Computing written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

The objective of this program has been to work towards development of spin based quantum dots for optically driven quantum information processing. Using a combination of ultrahigh resolution laser spectroscopy to study the physics of the dots and ultrafast laser technology to coherently control the spins, we made several advances. Our main achievements include working with a model system based on the exciton optical Bloch vector where we demonstrated the first solid state quantum logic device and made the first demonstration of quantum state tomography in a solid. We also were successful in taking the new quantum dot structures produced by our collaborator, Dan Gammon at NRL that contained one electron, and demonstrated optically induced and detected quantum spin coherence and coherent optical control of the spin state. Our high resolution measurements also provided a measurement of the spin relaxation rate. The funding level in this program was primarily to support one graduate student and purchase equipment. The remaining support for the work comes from ARO, NSA (formerly ARDA), AFOSR, NSF.

Single Semiconductor Quantum Dots

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Author : Peter Michler
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-06-13

Single Semiconductor Quantum Dots written by Peter Michler and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-06-13 with Technology & Engineering categories.

This book reviews recent advances in the field of semiconductor quantum dots via contributions from prominent researchers in the scientific community. Special focus is given to optical, quantum optical, and spin properties of single quantum dots.

Optically Probing Electron And Hole Spin Dynamics In Quantum Dots

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Author : Stefan Schäck
language : en
Publisher:
Release Date : 2006

Optically Probing Electron And Hole Spin Dynamics In Quantum Dots written by Stefan Schäck and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

Nanowire Quantum Dots As Sources Of Single And Entangled Photons

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Author : Milad Khoshnegar Shahrestani
language : en
Publisher:
Release Date : 2014

Nanowire Quantum Dots As Sources Of Single And Entangled Photons written by Milad Khoshnegar Shahrestani and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

Realization of linear quantum computation and establishing secure quantum communication among interacting parties demand for triggered quantum sources delivering genuine single and entangled photons. However, the intrinsic energy level spectrum of nanostructures made by the nature or developed under a random growth process energetically lacks the expected figures of merit to produce such quantized states of photons. Here, I present the semi-empirical modeling and experimental investigation on the spin fine structure of strongly confining quantum dots embedded in III-V nanowires. To this end, the quantum dot is numerically modeled via the Configuration Interaction method at two different levels: 1) single-particle level, where its pure energy level structure is resolved in the presence of strain and spin-orbit interaction. 2) Few-particle level, at which the few-body interactions appear as perturbative energy corrections and orbital correlations. I demonstrate the influence of quantum confinement on the binding energies and spin fine structure of excitons in the absence of hyperfine interaction. Importantly, the high-symmetry character of excitonic orbitals in nanowire quantum dots restore the degeneracy of optically-active ground-state excitons, offering an ideal spectrum for the entangled photon pair generation. To experimentally verify the idea, we design and fabricate defect-free nanowire quantum dots with ultra-clean excitonic spectrum, and construct the time correlation function of emitted photons through performing a series of low-temperature statistical quantum optics measurements. We observe a decent performance in terms of single photon generation under low excitation powers. Moreover, photon pairs emitted from the biexciton-exciton cascade of nanowire quantum dots exhibit color indistinguishability and polarization entanglement owing to the trivial fine structure splitting of the ground-state excitons. We further extend the idea by proposing the hybridized states of a nanowire-based quantum dot molecule as the potential source of higher-order entangled states. Tracing the field-dependent spectrum suggests the appearance of dominant features under the weak localization of electrons and coherent tunneling of holes. In addition to their Coulomb correlation, excitons also remain spatially correlated, opening new transition channels normally forbidden in the ground state of a single dot. The proposed structure can be exploited to create tripartite hybrid, GHZ and W-entangled states.

Colloidal Quantum Dot Optoelectronics And Photovoltaics

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Author : Gerasimos Konstantatos
language : en
Publisher: Cambridge University Press
Release Date : 2013-11-07

Colloidal Quantum Dot Optoelectronics And Photovoltaics written by Gerasimos Konstantatos and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-07 with Science categories.

Captures the most up-to-date research in the field, written in an accessible style by the world's leading experts.