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 28 for “"Quantum Simulations"”.
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Quantum simulations in interacting Rydberg synthetic dimensions
… atom arrays as a novel and flexible platform for quantum simulation. By coherently coupling a discrete set of Rydberg states via engineered microwave (MW) fields, we construct synthetic lattices in which internal atomic states serve as spatial sites. This framework emulates particle transport …
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Quantum simulations on square and triangular Hubbard models
… pairing. Moreover, our results show there is a quantum critical point (QCP) beneath the superconducting dome. The QCP is a zero-temperature instability which separates the Fermi liquid and pseudogap regions and exhibits the quantum _x001D_fluctuations which may lead to a high superconducting …
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Quantum simulations with 8̳8̳Sr+̳ ions on planar lattice traps
Quantum simulations are the use of well controlled many-body quantum systems to simulate and solve other many-body quantum systems that are not understood. This thesis describes theoretical proposals and experimental progress towards simulating quantum spin Hamiltonians with trapped SSSr+ ions on …
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Non-Perturbative studies of quantum field theories with classical and quantum simulations
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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Formation and dynamics of defects in pure and ion implanted a-titanium studied by quantum simulations
Density-functional theory calculations have been performed to study energetics of defects formation and diffusion in pure and krypton implanted hexagonal closed-packed (h.c.p) titanium. We employed the ab initio electronic structure calculations to study the formation energies of Ti vacancies and …
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Nonlinear Optics Quantum Computation and Quantum Simulation with Circuit-QED
Superconducting quantum circuits are a promising approach for realizations of large scale quantum information processing and quantum simulations. The Josephson junction, which forms the basis of superconducting circuits, is the only known nonlinear non-dissipative circuit element, and its inherent …
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Quantum simulation of many-body dynamics
Quantum computers and simulators have the potential to improve our understanding of physics, material science, chemistry, and biology by providing a window into the dynamics of quantum many-body systems that appear in these fields. In addition to growing our knowledge of fundamental science, an …
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Phase Transitions in driven 1D and Quasi-Periodic 2D Optical Lattices
… platform. They facilitate precisely controlled quantum simulations of a broad range of condensed matter phenomena. This thesis will describe work undertaken with this platform, to explore phase transitions in two different systems. The first is the observation of a first-order Mott transition in …
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Machine-Learned Representations of Basis Sets and Their Application in Quantum Computational Chemistry
Quantum simulations of electronic structure promise to deliver significant speedups over classical methods, but remain limited by the number of qubits on near-term devices. A key strategy to reduce quantum resource requirements is to truncate the molecular Hilbert space via compact and efficient …
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Multimode Circuit Quantum Electrodynamics With Superconducting Metamaterial Resonators
<p>Superconducting devices in circuit quantum electrodynamics (cQED) systems are one of the leading approaches for realizing scalable quantum information processors. The combination of cQED architectures with multimode resonator systems can provide a flexible platform for performing analog quantum …
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The quantum Fourier transform and quantum chaos
In this thesis I study control of quantum systems while implementing complex quantum operations. Through experimental implementations of such operations, I test the accuracy of control and provide methods for identifying the type and strength of experimental errors. The centerpiece of this work is …
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Diatomic excimer dynamics in microplasma lamps and alkali lasers
… emission occurs at 852.2 nm. By comparing full quantum simulations of Cs-Xe photoassociation to the gain spectrum of Cs-Xe in the red satellite of the Cs D2 line, it is shown that the structure of weakly bound Cs-Xe molecules (including the dissociation energy), correlated with Cs(62P3/2) + …
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Fabrication and Characterization of Superconducting Metamaterial Resonators
… low temperatures have led to rapid advances in quantum information processing as well as quantum optics in the microwave regime. Engineered quantum systems with a dense spectrum of modes coupled to artificial atoms, or qubits, formed from superconducting circuits offer an opportunity to explore …
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Open quantum system dynamics for describing state transfer
<p>In principle a quantum system could be used to simulate another quantum system. The purpose of such a simulation would be to obtain information about problems which are difficult to simulate on a classical computer due to the exponential increase of the Hilbert space with the size of the system, …
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Quantum Gas Microscopy of Bosonic Correlations in the Continuum
… experimental platform into a high-resolution quantum gas microscope for ultracold 87Rb atoms. Quantum gas microscopes enable site-resolved imaging, providing unprecedented access to quantum statistical effects and many-body phenomena. While such instruments are often employed to study physics …
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Dynamic and geometric control of electronic spins in diamond for quantum sensing and quantum information science
… system, has emerged as a promising platform for quantum sensing and quantum information science in ambient temperature. Its capability of robust but high-precision spin control allows the NV center to be not only a useful atomic-scale magnetic field sensor but also an attractive building block …
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Dynamics of impurities and trapped Bose-Einstein Condensates
… for a wide variety of applications, ranging from quantum simulations to quantum metrology. In this thesis, we investigate designing the confinement of tightly trapped impurities in a BEC reservoir to study their dissipative dynamics, and to study non-equilibrium dynamics of BECs confined in a …
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Towards Error-Resilience in Quantum Simulation of Lattice Gauge Theories
Digital quantum simulators may provide a powerful platform for addressing salient questions in a wide variety of fields including particle and condense-matter physics. A particularly rewarding target is given by lattice gauge theories. The fundamental principle of gauge-invariance imposes local …
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Algorithms for quantum simulation: design, analysis, implementation, and application
Simulating the Hamiltonian dynamics of quantum systems is one of the most promising applications of digital quantum computers. In this dissertation, we develop an understanding of quantum simulation algorithms concerning their design, analysis, implementation, and application. We implement three …
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Few- and many-body physics of dipoles in ion traps and optical lattice simulators
The presence of strong interactions in quantum many-body systems makes the analytical treatment of such systems very difficult. In this thesis we explore two possible proposals for simulating strongly correlated, quantum many-body systems: quantum simulations using trapped-ion quantum computers, …
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