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Title: Entangled Many-body States As Resources of Quantum Information Processing
Authors: LI YING
Keywords: Measurement-Based Quantum Computation, Distributed Quantum Computation, Topological Quantum Error Correction, Quantum Light-Matter Interfaces
Issue Date: 11-Apr-2013
Citation: LI YING (2013-04-11). Entangled Many-body States As Resources of Quantum Information Processing. ScholarBank@NUS Repository.
Abstract: In this thesis we theoretically discuss some proposals of quantum information processing without precise manipulations of interactions over a large number of qubits. Firstly, we study the measurement-based quantum computation utilizing single-particle operations on the thermal state of a model spin Hamiltonian with always-on interactions. We find computational errors induced by thermal fluctuations can be corrected and thus the computation can be executed fault tolerantly if the temperature is below a threshold value. Next, the fault-tolerant quantum computation on distributed quantum computers is investigated. A distributed quantum computer is composed of many small components, each of which only contains one or few qubits. The distributed architecture can also be used for the long-distance quantum communication. Then, we propose a protocol for the creation of photonic Greenberger-Horne-Zeilinger and linear cluster states emitted from a single atom or ion coupled to an optical cavity field. Finally, we investigate hybrid entangling gates via scattering between a flying photonic qubit and an atomic qubit (an emitter) coupled with a one-dimensional wave guide.
Appears in Collections:Ph.D Theses (Open)

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