Quantum computation over continuous variables

Details Quantum computation over continuous variables Quantum computation over continuous variables

1998-10-27

arxiv.org/abs/quant-ph/9810082v1

Phys.Rev.Lett. 82 (1999) 1784-1787

Physics

Quantum Physics

9 pages, TeX

Scientific paper

10.1103/PhysRevLett.82.1784

This paper provides necessary and sufficient conditions for constructing a universal quantum computer over continuous variables. As an example, it is shown how a universal quantum computer for the amplitudes of the electromagnetic field might be constructed using simple linear devices such as beam-splitters and phase shifters, together with squeezers and nonlinear devices such as Kerr-effect fibers and atoms in optical cavities. Such a device could in principle perform `quantum floating point' computations. Problems of noise, finite precision, and error correction are discussed.

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