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Frontiers in Optics

Near-Perfect Noisy NOON State Transfer in a Chain of Coupled Three-Level Atoms

Abuenameh Aiyejina, Ethan Wyke, Roger Andrews

Published Jan 1, 2021• 0 citations
Publisher

Abstract

We demonstrate the high-fidelity transfer of a n oisy two-excitation NOON state between the ends of a chain of 5 dipole-coupled three level atoms by engineering the values of the couplings between atoms.
DOI
10.1364/fio.2021.jtu1a.86

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Quantum state transfer in the presence of static disorder and noise is one of the main challenges in building quantum computers. We compare the quantum state transfer properties for two classes of qubit chains under the influence of static disorder. In fully engineered chains all nearest-neighbor couplings are tuned in such a way that a single-qubit state can be transferred perfectly between the ends of the chain, while in chains with modified boundaries only the two couplings between the transmitting and receiving qubits and the remainder of the chain can be optimized. We study how the disorder in the couplings affects the state transfer fidelity depending on the disorder model and strength as well as the chain type and length. We show that the desired level of fidelity and transfer time are important factors in designing a chain. In particular we demonstrate that transfer efficiency comparable or better than that of the most robust engineered systems can also be reached in chains with modified boundaries without the demanding engineering of a large number of couplings.
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