Energy Storage and Fluctuations in a Central-Spin Quantum Battery with Nearest-Neighbour Interactions

In this thesis the stored energy and its fluctuations of a central spin battery with nearest-<br/>neighbour interactions between the battery spins are investigated. Using analytical ex-<br/>pressions, it is shown that for 2 battery spins and equal strength in the flip-flop interaction<br/>g and nearest-neighbour interaction J, the fluctuations...

Quantum battery implementation on the Quantum Inspire platform

Quantum Batteries (QBs) are quantum-mechanical devices for energy storage, gaining interest due to a potential quantum advantage in power. Recently, the first experimental implementations of QBs were realised. This study characterises the superconducting transmon qubits of Starmon-5 as QBs using the Quantum Inspire platform. In addition to...

Optimal charging of a quantum battery

Synchronisation in complex networks

The main investigation in this thesis is the research on a future quantum internet. The focus is laid on<br/>the network structure of this quantum network. The network is rst examined by the investigation of the<br/>Kuramoto model for classical oscillators. The main property of the network is the ability to synchronise all<br/>nodes such that...

Optimizing quantum entanglement distillation

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...

Investigation of the Inelastic Tunneling Current for Electron Tunneling Spectroscopy on a Chain of Magnetic Atoms

The aim of this report is to investigate the inelastic tunneling current that would be measured during an inelastic electron tunneling spectroscopy experiment performed on a one dimensional chain of magnetic atoms. A chain consisting of n magnetic iron atomswith spin 2 has been examined. The spins of the iron atoms in the chain have been treated...

Optimal charging of a quantum battery consisting of electron spin qubits

When the size of a system is reduced to the scale of single particles, classical thermodynamics fails to predict the system’s behaviour as quantum fluctuations come into play. Recently it has been proven by Binder et all. [1] that theoretically a quantum battery, consisting of qubits, can be charged faster (i.e. with higher power per qubit) when...

Fidelity of a photon stream during transmission

A boolean QPQ using single photons

I propose an implementation of the quantum private query protocol as described in an article using a photon to encode a question and reflectionor transmission of the photon as answer options. Each question is represented by a photon in a transmission line with both ends returning to the user, and the answer is represented by reflection or...

Towards Secure Quantum Cloud Computing through NV-center enabled MDI-QKD

Feasibility of Quantum Genetic Algorithm in Optimizing Construction Scheduling

The increasing scale of projects in civil engineering industries leads to the increase of the amount and complexity of data that need to be treated and calculated. As a new non-traditional way of computing, quantum computing shows extremely powerful capabilities in huge data analysis and processing. In this research we focus on optimizing civil...