Quantum Tomography for Measuring Experimentally the Matrix Elements of an Arbitrary Quantum Operation
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- 7 May 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 86 (19) , 4195-4198
- https://doi.org/10.1103/physrevlett.86.4195
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.Keywords
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