Physical challenges of quantum computation

Yung, Man Hong

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Description

Title

Physical challenges of quantum computation

Author(s)

Yung, Man Hong

Issue Date

2010-01-06T16:12:29Z

Director of Research (if dissertation) or Advisor (if thesis)

Leggett, Anthony J.

Doctoral Committee Chair(s)

Kwiat, Paul G.

Committee Member(s)

• Leggett, Anthony J.
• Schulten, Klaus J.
• Weissman, Michael B.

Department of Study

Physics

Discipline

Physics

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

Ph.D.

Degree Level

Dissertation

Keyword(s)

• quantum computation
• quantum information
• decoherence
• quantum state transfer
• error correlation
• adiabatic quantum computing
• quantum simulation

Abstract

This is a study of several physical challenges for building a quantum computer, a hypothetical device which is capable of accomplishing tasks unachievable by the classical model of computation. In chapter 1, we will give an overview of quantum computation and discuss the physical challenges for building a realistic quantum computer. In chapter 2, we shall explore the applications of quantum computation for the simulation of molecular quantum systems. In particular, an efficient algorithm for evaluating the partition function (and hence free energy) is proposed. In chapter 3, quantum information transfer over spin chains is then discussed. A proof about the most efficient way to transfer quantum information in one dimension is constructed. In chapter 4, we shall consider the effects of quantum correlation induced by quantum mechanical environments on the efficiency of the methods of quantum error correction. In chapter 5, we consider how the thermal noise affects the reliability of an adiabatic quantum computer.

Graduation Semester

2009-12

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Copyright and License Information

Copyright 2009 Man Hong Yung

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