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 20 of 22 for “"quantum sensors"”.
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Interfacing spin-based quantum sensors with complex systems
… centres in bulk diamond crystals that enable quantum sensing via optically active spin ground states. They have demonstrated high sensitivity in thermometry and magnetometry, reaching a temperature precision of 5mK/√Hz and magnetic field sensitivity of a single nuclear spin. Due to their …
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Micro-fabricated diffractive optics for quantum sensors and atomic clocks
… of the GMOT facilitates proof-of-principle quantum sensing for future miniaturised atomic devices and instruments. These initial measurements include in situ magnetometry from compensating effects of homogeneous and inhomogeneous magnetic fields. Coherent population trapping was studied on …
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Solid-state cavity quantum electrodynamics with spin ensembles
Quantum sensors have the potential to operate at fundamental physical performance limits. Among various quantum sensing platforms, solid-state spin emitters stand out due to advantageous characteristics such as room-temperature spin polarization and readout, atomic-scale spatial resolution, and …
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Pulsed Magnetic Imaging of Broad-Frequency Fields using Nitrogen-Vacancy Centers in Diamond
… physics, and electronics troubleshooting. These quantum sensors yield widefield-of-view images with micron-scale spatial resolution and operate in ambient conditions. Most of the sensing work with NV centers in diamond has focused on DC and low frequency AC fields. This thesis demonstrates a …
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State-selective imaging of single rubidium atoms in a solid neon matrix
The development of single-spin quantum sensors with nanoscale resolution would provide immense utility in the determination of molecular structure, with applications in fields such as biology and chemistry. This dissertation discusses our progress toward using rubidium atoms trapped in solid neon …
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Quantum sensing and simulation with solid-state defects
… recent years due to their potential for various quantum applications, ranging from sensing, simulation to communications. Despite the fast progress of the field in the past decades, numerous challenges remain before these applications can be fully realized in broader scenarios. Among the issues …
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Hamiltonian engineering for quantum sensing and quantum simulation
Quantum sensing and quantum simulation are emerging areas in quantum science and technology with broad applications. In this thesis, we explore Hamiltonian engineering techniques to build better quantum sensors and quantum simulators. In quantum sensing, advanced control techniques are required to …
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Optical and spin coherence properties of Rb atoms in solid neon for magnetic field sensing
… in rare-gas matrices have been proposed for quantum sensing, fundamental physics measurements, and dark matter detection. Prior work shows that the electron spin state of alkali atoms in the inert gas matrix can be optically polarized, read out, and coherently manipulated. The matrix can be …
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Non-Gaussian Noise in Superconducting Circuits
… a system of Transmon qubits as ultra-sensitive quantum sensors and make the first clear experimental observation of non-Gaussian noise in a qubit system. I achieve this using multi-qubit dynamical decoupling sequences that characterize noise during two-qubit gates when the system is coupled …
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Coherent control of nitrogen-vacancy centers in diamond nanostructures for quantum sensing and networking
… of previously untested new phenomena using quantum entanglement for information processing and sensing. The solid-state environment of the diamond allows us to engineer nanostructures, which are promising for enhancing the optical and spin properties of the NV-. To help develop a component …
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Development of a Compact Diamond NV- Magnetometer
… new design possibilities for mobile and embedded quantum sensors, making quantum magnetometry more accessible for real-world deployment. The work also serves as a strong foundation for future investigations into system calibration and miniaturization.
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Solid-state spin-integrated circuits for quantum sensing and control
Spin systems are an increasingly important quantum-sensing platform. In particular, atomic defect centers in diamond called nitrogen-vacancy (NV) centers offer impressive room temperature imaging capabilities for both magnetic fields and temperature. NV-based sensing platforms have found utility in …
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Device- and application-adapted quantum error correction
Precise control of coherent quantum systems could enable new generations of sensing, communication and computing technologies. Such systems, however, are typically noisy and difficult to stabilize. One promising technique to this end is called quantum error correction, which encodes quantum states …
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Taming Quantum Noise in the Open: Spin Biophysics under Optimal Control
The quantum control of spin-correlated radical pairs (SCRPs) holds promise for the targeted manipulation of magnetic field effects (MFEs), with potential applications ranging from the design of noise-resilient quantum information processors to genetically encodable quantum sensors. However, …
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Vector magnetometry using cavity-enhanced microwave readout of solid-state spin sensors
Robust, high-fidelity readout is central to quantum device performance. Overcoming poor readout is therefore an increasingly urgent challenge for devices based on solid-state spin defects, particularly given their rapid adoption in quantum sensing, quantum information, and tests of fundamental …
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Generation and Uses of Distributed Entanglement in Quantum Information
In this thesis, we focus on the questions of how quantum entanglement can be generated between two or more spatially separated systems and, once generated, how it can be applied in quantum technology. First we will discuss a protocol, which we conjecture to be optimal in some regimes, that quickly …
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Exploring quantum geometry and quantum sensing with spin defects in diamond
… have witnessed rapid development in the field of quantum information science. Quantum technologies are promising to revolutionize many fields, ranging from fast computation and simulation to precise sensing and secure communication. While the performance of quantum devices in the current noisy …
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Quantum control of optically active defects in the solid state
A common thread in the realization of quantum computers, quantum networks, and quantum sensors is the search for promising physical platforms. The dislocations of atoms in the solid state, referred to as defects, have historically been deemed undesirable as they can be deleterious to the operation …
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Opportunities for multimodal quantum sensing in intracellular environments
Nanoscale quantum sensors offer an opportunity to probe systems with high sensitivity and spatial resolution. Nitrogen vacancy centers (NV) in diamond have emerged as one of the leading candidates for room temperature quantum sensing due to their stable photoluminescence and exceptional electronic …
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The First Laboratory Searches for Low-Mass Axion Dark Matter
… LC circuit and measured with high-sensitivity quantum sensors. The entire device must be kept only barely above absolute zero in order to reduce backgrounds that could mask a signal. The prototype experiment that is the primary focus of this thesis, ABRACADABRA-10 cm, set world-leading limits …
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