Quantum measurements with a quantum computer

Details Quantum measurements with a quantum computer Quantum measurements with a quantum computer

1997-05-08

arxiv.org/abs/quant-ph/9705014v1

Physics

Quantum Physics

9 pages, 3 figures; RevTex

Scientific paper

We present a scheme in which an ion trap quantum computer can be used to make arbitrarily accurate measurements of the quadrature phase variables for the collective vibrational motion of the ion. The electronic states of the ion become the `apparatus', and the method is based on regarding the `apparatus' as a quantum computer register which can be prepared in appropriate states by running a Fourier transform algorithm on the data stored within it. The resolution of the measurement rises exponentially with the number of ions used.

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