Tunneling Transfer Protocol in a Quantum Dot Chain Immune to Inhomogeneity

K. Korzekwa and P. Machnikowski Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

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We propose a quantum dot implementation of a quantum state transfer channel. The proposed channel consists of N vertically stacked quantum dots with the nearest neighbor tunnel coupling, placed in an axial electric field. We show that the system supports high-fidelity transfer of the state of a terminal dot both by free evolution and by adiabatic transfer. The protocol is to a large extent insensitive to inhomogeneity of the energy parameters of the dots and requires only a global electric field.

DOI: 10.12693/APhysPolA.120.859 PACS numbers: 73.21.La, 03.67.Hk