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5 papers · 2 filters
Experimental measurement of Hilbert-Schmidt distance between two-qubit states as means for speeding-up machine learning
Vojtěch Trávníček, Karol Bartkiewicz, Antonín Černoch +1
We report on experimental measurement of the Hilbert-Schmidt distance between two two-qubit states by many-particle interference. We demonstrate that our three-step method for meas…
Experimental kernel-based quantum machine learning in finite feature space
Karol Bartkiewicz, Clemens Gneiting, Antonín Černoch +3
We implement an all-optical setup demonstrating kernel-based quantum machine learning for two-dimensional classification problems. In this hybrid approach, kernel evaluations are o…
Experimental verification of time-order-dependent correlations in three-qubit Greenberger-Horne-Zeilinger-class states
Artur Barasiński, Antonín Černoch, Karel Lemr +1
In this paper, we investigate the genuine three-way nonlocality which is recognized as the strongest form of tripartite correlations. We consider theoretically and experimentally a…
Conserved quantities in parity-time symmetric systems
Zhihao Bian, Lei Xiao, Kunkun Wang +6
Conserved quantities such as energy or the electric charge of a closed system, or the Runge-Lenz vector in Kepler dynamics are determined by its global, local, or accidental symmet…
Interplay between strong and weak measurement: Comparison of three experimental approaches to weak value estimation
Jan Roik, Karel Lemr, Antonín Černoch +1
Weak values are traditionally obtained using a weak interaction between the measured system and a pointer state. It has, however, been pointed out that weak coupling can be replace…