Browsing by Title
Now showing items 106047-106066 of 143333
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Quantum sensing and simulation with solid-state defects
(Massachusetts Institute of Technology, 2023-06)Solid-state spin defects have garnered significant interest in recent years due to their potential for various quantum applications, ranging from sensing, simulation to communications. Despite the fast progress of the field ... -
Quantum signal processing
(Massachusetts Institute of Technology, 2002)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 ... -
Quantum signal processing by single-qubit dynamics
(Massachusetts Institute of Technology, 2017)Quantum computation is the most powerful realizable model of computation, and is uniquely positioned to solve specialized problems intractable to classical computers. This quantum advantage arises from directly exploiting ... -
Quantum Simulation of Generic Many-Body Open System Dynamics Using Classical Noise
(American Physical Society, 2017-04)We introduce a scheme for the quantum simulation of many-body decoherence based on the unitary evolution of a stochastic Hamiltonian. Modulating the strength of the interactions with stochastic processes, we show that the ... -
Quantum simulation of many-body dynamics
(Massachusetts Institute of Technology, 2022-09)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 ... -
Quantum Simulation of Many-body Systems with Superconducting Qubits
(Massachusetts Institute of Technology, 2023-06)The study of interacting many-body quantum systems is central to the understanding of wide a range of physical phenomena in condensed-matter systems, quantum gravity, and quantum circuits. However, quantum systems are often ... -
Quantum Simulation of Spin-1 Physics with Bosons in Optical Lattice
(Massachusetts Institute of Technology, 2021-06)Mott insulators of ultracold atoms in optical lattices are widely used as an experimental platform for simulating and studying many-body physics. A topic at the frontier of quantum simulation with Mott insulators is the ... -
Quantum Simulation via Filtered Hamiltonian Engineering: Application to Perfect Quantum Transport in Spin Networks
(American Physical Society, 2013-05)We propose a method for Hamiltonian engineering that requires no local control but only relies on collective qubit rotations and field gradients. The technique achieves a spatial modulation of the coupling strengths via a ... -
Quantum simulations of hydrodynamics via the Madelung transformation
(American Physical Society (APS), 2022) -
Quantum simulations with 8̳8̳Sr+̳ ions on planar lattice traps
(Massachusetts Institute of Technology, 2008)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 ... -
Quantum Simulators: Architectures and Opportunities
(American Physical Society (APS), 2021)Quantum simulators are a promising technology on the spectrum of quantum devices from special- ized quantum experiments to universal quantum computers. These quantum devices utilize entanglement and many-particle behavior ... -
Quantum singular-value decomposition of nonsparse low-rank matrices
(American Physical Society, 2018-01)We present a method to exponentiate nonsparse indefinite low-rank matrices on a quantum computer. Given access to the elements of the matrix, our method allows one to determine the singular values and their associated ... -
Quantum Solution to the Arrow-of-Time Dilemma
(American Physical Society, 2009-08)The arrow-of-time dilemma states that the laws of physics are invariant for time inversion, whereas the familiar phenomena we see everyday are not (i.e., entropy increases). I show that, within a quantum mechanical framework, ... -
Quantum Speed Limits across the Quantum-to-Classical Transition
(American Physical Society, 2018-02)Quantum speed limits set an upper bound to the rate at which a quantum system can evolve. Adopting a phase-space approach, we explore quantum speed limits across the quantum-to-classical transition and identify equivalent ... -
Quantum speed limits, coherence, and asymmetry
(2016-05)The resource theory of asymmetry is a framework for classifying and quantifying the symmetry-breaking properties of both states and operations relative to a given symmetry. In the special case where the symmetry is the set ... -
Quantum speed limits, coherence, and asymmetry
(American Physical Society, 2016-05)The resource theory of asymmetry is a framework for classifying and quantifying the symmetry-breaking properties of both states and operations relative to a given symmetry. In the special case where the symmetry is the set ... -
Quantum speed-ups in reinforcement learning
(SPIE-Intl Soc Optical Eng, 2021) -
Quantum speedups in query complexity
(Massachusetts Institute of Technology, 2017)In this thesis, we study randomized and quantum algorithms in the query complexity model. We investigate when and by how much quantum algorithms provide a speedup over the best possible classical algorithm in the query ... -
Quantum Spin Hall Effect and Topological Field Effect Transistor in Two-Dimensional Transition Metal Dichalcogenides
(American Association for the Advancement of Science (AAAS), 2014-11)Quantum spin Hall (QSH) effect materials feature edge states that are topologically protected from backscattering. However, the small band gap in materials that have been identified as QSH insulators limits applications. ... -
Quantum spin ice on the breathing pyrochlore lattice
(American Physical Society, 2016-08)The Coulombic quantum spin liquid in quantum spin ice is an exotic quantum phase of matter that emerges on the pyrochlore lattice and is currently actively searched for. Motivated by recent experiments on the Yb-based ...
