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Experimental test of entropic noise-disturbance uncertainty relations for three-outcome qubit measurements

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Title: Experimental test of entropic noise-disturbance uncertainty relations for three-outcome qubit measurements
Authors: Sponar, Stephan Browse this author
Danner, Armin Browse this author
Pecile, Vito Browse this author
Einsidler, Nico Browse this author
Demirel, Bulent Browse this author
Hasegawa, Yuji Browse this author
Issue Date: 4-Jun-2021
Publisher: American Physical Society (APS)
Journal Title: Physical Review Research
Volume: 3
Issue: 2
Start Page: 023175
Publisher DOI: 10.1103/PhysRevResearch.3.023175
Abstract: Information-theoretic uncertainty relations formulate the joint immeasurability of two noncommuting observables in terms of information entropies. The tradeoff of the accuracy in the outcome of two successive measurements manifests in entropic noise-disturbance uncertainty relations. Recent theoretical analysis predicts that projective measurements are not optimal, with respect to the noise-disturbance tradeoffs. Therefore, the results in our previous paper [Phys. Rev. Lea. 115, 030401 (2015)] are outperformed by general quantum measurements. Here, we experimentally test a tight information-theoretic measurement uncertainty relation for three-outcome positive-operator-valued measures, using neutron spin-1/2 qubits. The obtained results violate the lower bound for projective measurements as theoretically predicted.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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