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Karol Bartkiewicz on Muck Rack

Karol Bartkiewicz

As seen in: Physical Review B
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Articles

Experimental relative entanglement potentials of single-photon states

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By Josef Kadlec, Karol Bartkiewicz, Adam Mickiewicz, Antonín Černoch
| Physical Review B
Entanglement potentials (EPs) enable the characterization and quantification of the nonclassicality of single-mode optical fields by measuring the entanglement generated through beam splitting. We experimentally generated single-photon states and tomographically reconstructed the corresponding two-qubit states to determine EPs defined via popular two-qubit measures of entanglement. These include the potentials for the relative entropy of entanglement (REEP), concurrence, and negativity.
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Sensitivity versus selectivity in entanglement detection via collective witnesses

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By Adam Mickiewicz, Ip As Cr, Jan Roik, Karol Bartkiewicz
| Physical Review B
In this paper, we introduce a supervised learning technique that harnesses artificial neural networks, along with the outcomes of collective entanglement measurements, to estimate the negativity of quantum states in two-qubit and qubit-qutrit systems. The resulting deep-learned collective entanglement witnesses offer the unique capability of continuous sensitivity and selectivity tuning.
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