Quantum Tomography for Measuring Experimentally the Matrix Elements of an Arbitrary Quantum Operation

G. M. D'Ariano and P. Lo Presti
Phys. Rev. Lett. 86, 4195 – Published 7 May 2001
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Abstract

Quantum operations describe any state change allowed in quantum mechanics, including the evolution of an open system or the state change due to a measurement. We present a general method based on quantum tomography for measuring experimentally the matrix elements of an arbitrary quantum operation. As input the method needs only a single entangled state. The feasibility of the technique for the electromagnetic field is shown, and the experimental setup is illustrated based on homodyne tomography of a twin beam.

  • Received 14 December 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.4195

©2001 American Physical Society

Authors & Affiliations

G. M. D'Ariano and P. Lo Presti

  • Theoretical Quantum Optics Group, INFM Unità di Pavia, Dipartimento di Fisica “Alessandro Volta,” Università di Pavia, via Bassi 6, I-27100 Pavia, Italy

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Vol. 86, Iss. 19 — 7 May 2001

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