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 19 of 19 for “"Quantum measurement"”.
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A quantum measurement model of reaction-transport systems
Made available in DSpace on 2018-09-04T20:26:47Z (GMT). No. of bitstreams: 6 PERCEL-DISSERTATION-2018.pdf: 1004552 bytes, checksum: bffccde00ce59b48fcba202beda50fbc (MD5) Dissertation final draft 03-24-18.tex: 580978 bytes, checksum: b4b500d8ffa47e05d4bcc590c0360c62 (MD5) …
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Non-destructive electron microscopy through interaction-free quantum measurement
… this thesis, the possibility of interaction-free quantum measurements with electrons is investigated. With a scheme based on existing charged particle trapping techniques, it is demonstrated that such interaction-free measurements are possible in the presence of previously measured quantum …
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Fault-Tolerant Quantum Measurement of Error Syndromes and Logical Operators
<p>Fault-tolerant quantum computation requires the measurements of error syndromes and logical operators in a way that minimizes undesired correlated errors on the quantum data. This thesis explores possible forms for performing these measurements. Our first result aims at minimizing the number of …
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Ultracold bosons in optical lattices for quantum measurement and simulation
… and have found uses in both the fields of quantum measurement and quantum simulation. Optical lattices, created by the AC Stark shift of a coherent laser beam, are a versatile tool to control ultracold atoms and implement novel Hamiltonians. In this thesis, I report on three experiments …
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Interference Purcell Filter for Fast, Modular, and Hardware-Efficient Quantum Measurement
… decay for fast, modular, and hardware-efficient quantum measurement that we call an “interference” Purcell filter. Superconducting qubits experience many decay channels, one of which is Purcell decay, or leakage of the qubit state into the readout line. The proposed work suppresses Purcell decay …
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Applications of Quantum Measurement Techniques: Counterfactual Quantum Computation, Spin Hall Effect of Light, and Atomic-Vapor-Based Photon Detectors
… have tremendous implications, e.g., for optical quantum information processing. The feasibility of operation of this approach at the desired level is studied theoretically and several promising physical systems are investigated.
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Applications of quantum measurement techniques: counterfactual quantum computation, spin hall effect of light, and atomic-vapor-based photon detectors
… phenomena in atomic and optical physics, and quantum information science, by utilizing various types and techniques of quantum measurements. It is the deeper concepts of these measurements, and the way they are integrated into the seemingly unrelated topics investigated, which binds together …
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Generalized entanglement in quantum information theory : optimization free measures and faithful extraction protocols
By studying generalizations of entanglement to quantum resource theories,we will provide a continuous family of optimization free measures to quantify the resource in a system, for any theory whose set of free states is given by the image of an idempotent and unital quantum operation. With the help …
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Calibration and Utilization of High-Fidelity Two-Qubit Operations
… strides have been made in the field of quantum computing. Quantum advantage has been reported, and there is now an ecosystem of cloud-based quantum processors and companies interested in using them. However, high error rates continue to limit circuit depth, such that solving real-world …
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Fabrication of Superconducting Reflectionless Filters for Quantum Microwave Circuits
… performance and scalability of superconducting quantum circuits depends critically on the microwave environment. Minimizing signal reflections and suppressing thermal noise are essential for achieving high-fidelity readout and preserving qubit coherence. A significant challenge arises from the …
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Quantum signal processing
Quantum signal processing (QSP) as formulated in this thesis, borrows from the formalism and principles of quantum mechanics and some of its interesting axioms and constraints, leading to a novel paradigm for signal processing with applications in areas ranging from frame theory, quantization and …
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Value Indefiniteness, Randomness and Unpredictability in Quantum Foundations
The outcomes of quantum measurements are generally considered to be random, but despite the fact that this randomness is an important element in quantum information theory, its nature is not well understood. In this thesis, we study several issues relating to the origin and certification of quantum …
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Electron Transport through Carbon Nanotube Quantum Dots in A Dissipative Environment
… is essential in understanding funda- mental quantum-mechanical concepts, such as quantum measurement and quantum entanglement. It is thought that a dissipative environment may be responsible for certain types of quantum (i.e. zero-temperature) phase transitions. We observe such a quantum …
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On the Generation of Entanglement in Ytterbium Clock Atoms and a Novel Interpretation of the Madelung Fluid Theory of Quantum Mechanics
… a novel interpretation of the Madelung Theory of Quantum Mechanics, namely that of a particle-fluid decomposition and it's consequences. In more detail, in one experiment, we demonstrate near-unitary squeezing of the collective spin state of ~10³ atoms in an optical lattice clock atom wiht a …
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Extracting classical information from quantum states : fundamental limits, adaptive and finite-length measurements
… and efficient optical communication systems, quantum mechanics of information processing has become the key element in determining the fundamental limits of physical channels, and in designing quantum communication systems that approach those fundamental limits. To achieve higher data rates …
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Locally Adaptive Protocols for Quantum State Discrimination
… contributions to two rapidly developing fields: quantum information theory and machine learning. It has recently been demonstrated that reinforcement learning is an effective tool for a wide variety of tasks in quantum information theory, ranging from quantum error correction to quantum control …
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Investigations of quantum sensing techniques for deflection and displacement metrology
… designing experiments to surpass the standard quantum limit in deflection and displacement measurements. First, we review weak measurement techniques, then describe our strategy and results from implementing recycling to measure a beam deflection. We then discuss how spatial correlations emerge …
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Algorithmic Quantum-State Generation for Simulating Quantum Field Theories on a Quantum Computer
Simulating a quantum field theory (QFT) on a quantum computer comprises three steps: generating an initial state, simulating time evolution and measuring observables, with the initial-state generation being the most expensive step for the entire simulation. In this thesis, we introduce a general …
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Novel protocols for entanglement characterization and protection
L'abstract è presente nell'allegato / the abstract is in the attachment