Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"quantum repeater"”.
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Photonic Entanglement for a Quantum Repeater
Quantum Key Distribution (QKD) has opened a new avenue for secure communication, by allowing one to distribute a random secret key between two users that are connected through a public channel without revealing information to unauthorized parties. If a message is encrypted with the one time pad (a …
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Dense Spin Arrays with Low Cross-talk Operations for Quantum Network Applications
In this master thesis, we propose a quantum repeater architecture based on a spin array with an efficient optical interface. Single qubit control and multi-qubit gates can be realized by localized electric field with low cross-talk and power consumption. This thesis will also contain how we use …
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Protocols and Devices for Scalable Spin-Photon Quantum Networks
One of the central goals in quantum information science is constructing a quantum network useful for quantum communication, sensing, and computation. Its realization crucially depends on efficient distribution of entanglement. A promising approach entails connecting quantum nodes via photons, which …
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Optical cavity integrated surface ion trap for enhanced light collection
… qubits that can be transmitted to connect remote quantum systems. Single photons transmitted from two remote sites, each entangled with one quantum memory, can be used to entangle distant quantum memories by interfering on a beam splitter. Efficient remote entanglement generation relies upon …
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Spatial mode control and advanced methods for multi-platform quantum communication
Though state-of-the-art quantum computers are currently limited to only a handful of physical qubits, a quantum computer large enough to perform prime factorization of modern cryptographic keys, quantum simulation, and quantum-enhanced searching algorithms will likely become viable within a few …
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Building efficient light-matter interfaces for quantum systems
Efficient collection of photons from quantum memories, such as quantum dots (QDs) and nitrogen vacancy (NVs) centers in diamond, is essential for various quantum technologies. This thesis describes the design, fabrication, and utilization of novel photonic structures and systems to achieve …
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Quantum Correlations for Fundamental Tests and Quantum Communication
Quantum correlations arising from measurements on pairs of entangled particles are often referred to as the most non-classical feature of quantum mechanics. As such, they have found a role in many fundamental tests of quantum mechanics and most emerging applications in the field of quantum …
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Growth, characterization and implementation of semiconductor sources of highly entangled photons
… an essential component in a variety of potential quantum information applications. Suitable emitters need to generate photons deterministically and at fast repetition rates, with highest degrees of single-photon purity, entanglement and indistinguishability. Semiconductor quantum dots are among …
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Fundamentals of Quantum Communication Networks: Scalability, Efficiency, and Distributed Quantum Machine Learning
The future quantum Internet (QI) will transform today's communication networks and user experiences by providing unparalleled security levels, superior quantum computational powers, along with enhanced sensing accuracy and data processing capabilities. These features will be enabled through …
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Deterministic spin and photon control with a symmetry protected colour centre
Quantum networking, whereby quantum mechanical entanglement is distributed through a network and used as a vector for information transfer, is an ambitious emerging technology. It requires a stationary, compute, qubit at a node in the network to interface with a flying, photonic, qubit for …
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Semiconductor-generated entangled photons for hybrid quantum networks
The deterministic generation and manipulation of quantum states has attracted much interest ever since the rise of quantum mechanics. Large-scale, distributed quantum states are the basis for novel applications such as quantum communication, quantum remote sensing, distributed quantum computing or …