Quantum Logic circuits for solid-state quantum information processing

Created by W.Langdon from gp-bibliography.bib Revision:1.3872

  author =       "Andrea {Del Duce}",
  title =        "Quantum Logic circuits for solid-state quantum
                 information processing",
  school =       "University College London",
  year =         "2009",
  address =      "UK",
  month =        oct,
  keywords =     "genetic algorithms, genetic programming",
  URL =          "http://discovery.ucl.ac.uk/20166/1/20166.pdf",
  bibsource =    "OAI-PMH server at eprints.ucl.ac.uk",
  language =     "eng",
  oai =          "oai:eprints.ucl.ac.uk.OAI2:20166",
  URL =          "http://eprints.ucl.ac.uk/20166/",
  size =         "175 pages",
  abstract =     "This thesis describes research on the design of
                 quantum logic circuits suitable for the experimental
                 demonstration of a three-qubit quantum computation
                 prototype. The design is based on a proposal for
                 optically controlled, solid-state quantum logic gates.
                 In this proposal, typically referred to as SFG model,
                 the qubits are stored in the electron spin of donors in
                 a solid-state substrate while the interactions between
                 them are mediated through the optical excitation of
                 control particles placed in their proximity.

                 After a brief introduction to the area of quantum
                 information processing, the basics of quantum
                 information theory required for the understanding of
                 the thesis work are introduced. Then, the literature on
                 existing quantum computation proposals and experimental
                 implementations of quantum computational systems is
                 analysed to identify the main challenges of
                 experimental quantum computation and typical system
                 parameters of quantum computation prototypes. The
                 details of the SFG model are subsequently described and
                 the entangling characteristics of SFG two-qubit quantum
                 gates are analysed by means of a geometrical approach,
                 in order to understand what entangling gates would be
                 available when designing circuits based on this
                 proposal. Two numerical tools have been developed in
                 the course of the research. These are a quantum logic
                 simulator and an automated quantum circuit design
                 algorithm based on a genetic programming approach. Both
                 of these are used to design quantum logic circuits
                 compatible with the SFG model for a three-qubit
                 Deutsch-Jozsa algorithm. One of the design aims is to
                 realise the shortest possible circuits in order to
                 reduce the possibility of errors accumulating during
                 computation, and different design procedures which have
                 been tested are presented. The tolerance to
                 perturbations of one of the designed circuits is then
                 analysed by evaluating its performance under increasing
                 fluctuations on some of the parameters relevant in the
                 dynamics of SFG gates. Because interactions in SFG
                 two-qubit quantum gates are mediated by the optical
                 excitation of the control particles, the solutions for
                 the generation of the optical control signal required
                 for the proposed quantum circuits are discussed.
                 Finally, the conclusions of this work are presented and
                 areas for further research are identified.",

Genetic Programming entries for Andrea Del Duce