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22 January 2010Entanglement enhanced quantum sensing
W. Wieczorek,1,2 R. Krischek,2 N. Kiesel,3 Ch. Schmid,4 H. Weinfurter1,2
1Max-Planck Institute for Quantum Optics (Germany) 2Ludwig-Maximilians-Univ. Munich (Germany) 3Univ. of Vienna (Austria) 4European Space Observatory (Germany)
Entanglement between quantum objects can be used to enhance the sensitivity of measurements. We demonstrate this
effect by using entangled multi-photon states to go beyond the shot noise limit when observing polarization rotations.
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W. Wieczorek, R. Krischek, N. Kiesel, Ch. Schmid, H. Weinfurter, "Entanglement enhanced quantum sensing," Proc. SPIE 7608, Quantum Sensing and Nanophotonic Devices VII, 76080P (22 January 2010); https://doi.org/10.1117/12.837531