Optimization of Entangling Logic Gates Based on the Rydberg Blockade Effect

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Abstract

The implementation of a quantum logic gate in a system of cold atoms in optical microtraps is analyzed. The dynamics of two spin qubits is simulated, and a number of processes that limit the efficiency of entanglement based on the Rydberg blockade effect are considered. A geometry of two-photon excitation of Rydberg states of atoms is proposed that makes it possible to increase the robustness of the system to variations in a number of parameters and to reduce losses associated with the incoherent scattering of the driving field.

About the authors

L. V. Gerasimov

Quantum Technology Centre, Faculty of Physics, Lomonosov Moscow State University; Center for Advanced Studies, Peter the Great St. Petersburg Polytechnic University

Email: gerasimov_lv@spbstu.ru
Moscow, 119991 Russia;St. Petersburg, 195251 Russia

D. V. Kupriyanov

Quantum Technology Centre, Faculty of Physics, Lomonosov Moscow State University

Email: gerasimov_lv@spbstu.ru
Moscow, 119991 Russia

S. S. Straupe

Quantum Technology Centre, Faculty of Physics, Lomonosov Moscow State University;Russian Quantum Center

Author for correspondence.
Email: gerasimov_lv@spbstu.ru
Moscow, 119991 Russia;Skolkovo, Moscow, 121205 Russia

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