Simon nickerson phd thesis

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Items thesis Spiral are protected by copyright, simon nickerson phd thesis all rights reserved, unless otherwise indicated. Quantum computing has the potential thesis transform information technology by offering algorithms for certain tasks, such as quantum simulation, that are vastly more efficient than what is possible with any classical device.

But experimentally implementing practical quantum information processing is a very difficult task.

Here we study two important, and closely related, aspects of this challenge: In Part I of this thesis we analyse one approach phd thesis building a scalable quantum computer by networking together many simple processor cells, simon nickerson avoiding the phd thesis to create a single complex structure.

The difficulty is that realistic quantum links are very error prone.

Here we describe a method by which even thesis error-prone cells can perform quantum error correction. Simon nickerson phd thesis of cells generate and purify shared resource states, which then enable continue reading of topologically encoded data. Furthermore, we thesis that with some adjustments, the protocols we employ can be made robust also against simon nickerson phd thesis levels of loss in the network interconnects.

We go on to analyse the potential running speed of such a device.

Simon Nickerson's Research

Using levels of fidelity that are either already achievable thesis experimental systems, or will be in the near-future, we find that employing a surface code approach in a highly noisy and lossy network architecture can result in kilohertz computer clock speeds.

In Part II we consider the question of quantum error correction beyond the surface simon nickerson phd. We consider several families of topological codes, and determine the minimum requirements to demonstrate thesis error suppression in thesis type of code. A particularly promising code is the gauge color code, which admits a universal transversal gate set.

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Furthermore, a recent result of Bombin shows the gauge color code simon nickerson phd thesis an error-correction protocol simon nickerson phd achieves tolerance to noisy measurements without /thesis-about-money-management.html click for repeated measurements, so called single-shot error correction. Here, we demonstrate the promise of single-shot error correction by designing a decoder and investigating its performance.

We simulate thesis error correction with the gauge color code, and estimate simon nickerson phd thesis sustainable error rate, i. Engineering and Physical Sciences Research Council.

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