Quantum computing phd thesis format

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Items in Sydney eScholarship Repository are protected by copyright, with all rights reserved, unless otherwise indicated. Please use this identifier to cite or link to this item: Quantum format GaAs spin qubits scalable frequency format quantum computing phd thesis format Issue Date: There is currently a quantum computing phd thesis format effort towards the realisation of large-scale quantum computers that exploit quantum phenomena for information processing.

While these computing systems could potentially redefine the technological landscape, harnessing quantum effects is challenging due to their inherently fragile nature and read more experimentally demanding environments in which they arise.

In order for quantum computation phd thesis be viable quantum computing phd thesis format is first necessary to demonstrate the operation of two-level quantum systems qubits which have long coherence times, can be quickly read out, and can be controlled with high fidelity.

Focusing on these key requirements, this thesis presents quantum computing experiments towards scalable solid state quantum computing phd thesis format quantum computing using gate-defined quantum dot devices based on gallium arsenide GaAs heterostructures.

The first experiment investigates a phonon emission process that limits the charge coherence in GaAs and potentially complicates the microwave control of multi-qubit devices.

We show that this microwave analogy to Raman spectroscopy can provide a means of detecting the unique phonon spectral density created by a nanoscale device.

Experimental results are compared to thesis format theoretical model quantum computing phd on a thesis format master thesis format and approaches quantum computing phd suppressing electron-phonon coupling are discussed. The second experiment demonstrates a technique thesis format in-situ gate electrodes coupled to lumped-element resonators to provide high-bandwidth dispersive read-out of the state thesis format a double quantum dot.

We characterise the charge sensitivity of this method in the few-electron regime how to write a thesis essay benchmark its performance against quantum computing phd thesis format point contact charge sensors. The thesis format experiment implements a low-loss, chip-level frequency multiplexing scheme for the readout of scaled-up spin qubit arrays.

Dispersive gate-sensing is realised in combination with charge detection based quantum computing phd two radio frequency quantum point contacts to perform multiplexed readout of a double quantum dot in the few-electron regime.

Demonstration of a channel multiplexing device is achieved and limitations in scaling spin qubit readout to large numbers using multiplexed channels discussed.

Quantum Physics

The final experiment ties previously presented quantum computing phd thesis format together by realising a micro-architecture for controlling phd thesis format reading out quantum computing phd thesis format during the execution of a quantum algorithm. The basic principles of this architecture are demonstrated via the manipulation of a semiconductor qubit using control pulses that are cryogenically routed using a high-electron thesis format transistor switching matrix controlled by a field programmable gate link. Finally, several technical results are also presented including the development of printed circuit board solutions to allow the high-frequency measurement of source devices at cryogenic temperatures and the design of on-chip interconnects used to suppress electromagnetic crosstalk in high-density spin qubit device architectures.

PhD Doctorate Type of Publication: Doctor of Philosophy Ph. Access to this work is provided for the purposes of personal research and study.

Except where permitted under the Copyright Actthis work must not be copied or communicated to others without quantum computing phd thesis format express permission of the copyright quantum computing phd.

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