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arXiv · 1504.04200

Experimental test of entropic noise-disturbance uncertainty relations for spin-1/2 measurements

Georg Sulyok·Stephan Sponar·Buelent Demirel·Francesco Buscemi·Michael J. W. Hall·Masanao Ozawa·Yuji Hasegawa
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Abstract

Information-theoretic definitions for noise and disturbance in quantum measurements were given in Phys. Rev. Lett. 112, 050401 (2014) and a state-independent noise-disturbance uncertainty relation was obtained. Here, we derive a tight noise-disturbance uncertainty relation for complementary qubit observables and carry out an experimental test. Successive projective measurements on the neutron's spin-1/2system, together with a correction procedure which reduces the disturbance, are performed. Our experimental results saturate the tight noise-disturbance uncertainty relation for qubits when an optimal correction procedure is applied.

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Georg Sulyok, Stephan Sponar, Buelent Demirel, Francesco Buscemi, Michael J. W. Hall, Masanao Ozawa, Yuji Hasegawa. 2015-04-16. Experimental test of entropic noise-disturbance uncertainty relations for spin-1/2 measurements. https://doi.org/10.1103/physrevlett.115.030401

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