Phys. Rev. Lett. 96, 020408 (2006) [4 pages]Realization of a Minimal Disturbance Quantum MeasurementReceived 13 October 2005; published 20 January 2006 We report the first experimental realization of an “optimal” quantum device able to perform a minimal disturbance measurement on polarization encoded qubits saturating the theoretical boundary established between the classical knowledge acquired of any input state, i.e., a “classical guess,” and the fidelity of the same state after disturbance due to measurement. The device has been physically realized by means of a linear optical qubit manipulation, postselection measurement, and a classical feed-forward process. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.020408
DOI:
10.1103/PhysRevLett.96.020408
PACS:
03.65.Ta, 03.67.Hk, 42.50.Xa
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