Research description
Theory of fault tolerant methods in
quantum computing; experiments in quantum computing with trapped ions
Quantum computing is a form of information processing which exploits
quantum behaviour in order to gain computational advantages. In particular,
it involves the controlled manipulation of quantum entanglement. The aim of
the research is to achieve such manipulation in a system of laser-cooled ions,
and to apply basic ideas in information theory, such as error correction
coding, to quantum systems. This leads to fault-tolerant methods which allow
quantum information processing to work in the presence of noise. This is
crucial because the stabilisation methods which are an intrinsic part of
classical computers cannot be applied in the quantum regime, and without some
such stabilisation larger quantum computers will not work.
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Key Publications
Isotope-selective
photoionization for calcium ion trapping
D.
M. Lucas, A.
Ramos, J.
P. Home, M.
J. McDonnell, S.
Nakayama, J.-P.
Stacey, S.
C. Webster, D.
N. Stacey, and A.
M. Steane
Phys. Rev. A 69, 012711 (2004). First observation of
laser-cooled 43Ca+ crystals.
Efficient fault-tolerant quantum computing
Steane, A. Nature, vol. 399,
124-126 (1999).
Quantum Computing
Steane A. Rep. Prog. Phys. 61,
117-173 (1998). Review of quantum computing.
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Department of Physics
