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Wabeke, Ronne (author)Ecology as an equal user of the city <br/>The city is designed to be human-centred. In the multispecies urban environment humans take on roles of management and ownership over flora and fauna. This leaves the richness and biodiversity of urban habitats in the hands of humans (Denters, 2020). Ecology is often treated as a second class citizen and...master thesis 2024
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Dijksman, Calvin (author)The distribution of multiple entangled pairs plays a vital role in various applications, such as quantum metrology, blind quantum computing, quantum key distribution, and quantum teleportation. While qubit-based protocols exist, they are often limited by short coherence times in quantum memories and the need for individual pair generation,...master thesis 2023
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Bharos, Niveda (author)For many quantum applications we require high-fidelity entanglement between multiple pairs of solid state qubits at a distance. To achieve a high fidelity, we have to minimize the time during which the generated qubits need to stay coherent. Entanglement protocols often used in practice only generate one qubit at the same time. To generate...master thesis 2023
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van der Leun, Joanna (author)In advanced capitalist societies, nature has become more dependent on human influence. But some species are living in closer proximity than others. Including the Lesser Black-backed Gull. Throughout the 20th century, human activities have led to changes in the environment of this “synanthropic” species, a species living in close proximity to...master thesis 2023
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Talsma, Lars (author)Quantum computers can solve certain problems faster than classical computers, but they require many qubits to solve valuable problems. Distributed quantum computing provides a scalable approach to increasing the number of qubits by interconnecting small-capacity quantum devices, or quantum nodes. Entangled states shared between nodes, so-called...master thesis 2023
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Sharma, Hemant (author)Quantum repeaters are critical in the development of the quantum internet because they enable quantum communication over long distances. Third-generation quantum repeaters or one-way quantum repeaters are the most advanced quantum repeaters that do not require two-way com- munication between nodes. Borregaard et al. (2019) proposed an...master thesis 2022
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MIYAWAKI, YU (author)Entanglement is an essential resource for a variety of applications, such as distributed quantum computing and quantum cryptography. However, long-distance entanglement generation is challenging because of two reasons: photon loss occurs as an exponential function of distance through an optical fiber and the no-cloning theorem prevent us from...master thesis 2022
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Ubbens, Otmar (author)Crucial to the behaviour of a Nitrogen-Vacancy (NV) centre are its excited state cyclicities, determining the ability to perform high fidelity readout, spin-photon entanglement generation or fast spinpumping. This work presents a unified model to predict these excited state cyclicities over a wide range of strain, electric field, magnetic field...master thesis 2022
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SOTIROPOULOS, YORGOS (author)High fidelity GHZ states among remote nodes is a precious commodity which can allow for non-local stabilizer measurements and thus pave the way for a modular fault-tolerant quantum computer. To this end, we extend the high fidelity intracavity gate introduced by Borregaard et al. (2015) to distributed paradigm, consisting of SnV-inspired atomic...master thesis 2022
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Teepe, Annick (author)Generation of high fidelity entanglement between quantum nodes is a key component of a future quantum internet. Heralded entanglement generation of two spatially separated qubit nodes can be established by interference and measurement of two photons, each entangled with one qubit state. The two-node entanglement fidelity is limited by the degree...master thesis 2021
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Bharos, Niveda (author)Many applications of quantum communication require a high amount of entanglement between the states of two separated parties, for example quantum teleportation or superdense coding. However, when states are locally entangled and then separated, errors arise during transportation of the qubits. This results in a lower amount of entanglement...bachelor thesis 2021
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Klijnjan, Tim (author)Synchronisation is the remarkable phenomenon of in-phase movement of coupled oscillators during a prolonged period of time, which even occurs when these have different natural frequencies. This property is used in many fields like physics, biology and chemistry, to model various system behaviours, for instance: circadian rhythms in the chemistry...bachelor thesis 2021
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Bosma, Jan (author)The first part of this thesis provides a mathematical description for bipartite quantum correlations, aiming to analyze the geometry of several sets of correlations. We explain why quantum entanglement can be used to simulate shared randomness: C<sub>loc</sub>(Γ) ⊆ C<sub>q</sub><sup>d</sup>(Γ) for a sufficiently large d. The known bound for this...bachelor thesis 2020
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van Laarhoven, Menno (author)The concept of entanglement is one of the distinguishing features in quantum mechanics. Information about one particle can determine the state of another particle. This information and entanglement in subsystems is quantified by the entanglement entropy. The entanglement entropy has become an important research topic in recent years....bachelor thesis 2020
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Jansen, S.E.D. (author)This thesis deals with n-to-1 entanglement distillation protocols for bipartite quantum systems in a group theoretical setting. The local operations in the protocols are restricted to Clifford operations. An efficient representation of the elements of the Clifford group in terms of binary matrices is presented. Moreover, a characterization of...bachelor thesis 2020
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Loor, Stephan (author)In this thesis, two topics are studied: mathematical inequalities and non-linear quantum entanglement witnesses. First, various inequalities, like the Cauchy-Schwarz inequality (on finite dimensional vector spaces) and Jensen's inequality, along with their extensions and generalisations, are proved and discussed. The intimate relationship...bachelor thesis 2019
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Ivlev, Sasha (author)This thesis will focus on verifying the area-law for the entanglement entropy SN for spin-1 2 lattice systems in 2 dimensions, with ferromagnetic interactions defined by the nearest neighbour XX-model. The area-law implies that the SN of a subsystem is expected to scale proportionally to the size of the boundary through which that subsystem...bachelor thesis 2019
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ter Hoeven, Roeland (author)The realisation of a quantum network in the near future has been made possible by the developments in qubit systems. Links between quantum nodes in major cities in The Netherlands are scheduled to be demonstrated by 2020. There are many things that need to be considered in the development of a quantum network, in this thesis a few of these will...master thesis 2018
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Wesdorp, Jaap (author)We generate entanglement between two transmon qubits each coupled to a readout resonator and located on different chips via engineering a half-parity measurement. This measurement does not distinguish |01> from |10>, thus if started in an initial full twoqubit superposition it will project the qubits to an odd Bell state 50% of the time....master thesis 2017
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Schiet, T. (author)Quantum entanglement is a physical resource that is essential for many quantum information processing tasks, such as quantum communication and quantum computing. Although entanglement is essential for practical implementations in those fields, it is hard to create and transmit entanglement reliably. External factors introduce noise which may...bachelor thesis 2016