Abstract
The process of quantum tomography of polarization-entangled photon pairs was simulated on quantum computers of different generations of the IBM Q Experience platform. The simulation was carried out for all four two-qubit Bell states. It turned out that the contribution of basis states that are absent in Bell states does not exceed 10\(\%\) even on quantum computers of the first generations, and is reduced to several percent on quantum computers of the latest generation. The simulation quality was evaluated using Fidelity. The Fidelity values were in a range of 68.6–94.9\(\%\), depending on the generation of computers. It was shown that for Bell states Fidelity can be calculated using three tomographic measurements instead of the nine required for determination of the density matrix using quantum state tomography.
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ACKNOWLEDGMENTS
We thank professor V.M. Gordienko for support of the work and professor A.S. Chirkin for discussion of the results and helpful remarks.
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Manko, S.D., Frolovtsev, D.N. & Magnitsky, S.A. Simulation of Quantum Tomography Process of Biphoton Polarization States on a Quantum Computer. Moscow Univ. Phys. 76, 97–103 (2021). https://doi.org/10.3103/S0027134921020065
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DOI: https://doi.org/10.3103/S0027134921020065