Related papers: Optimal recoil-free state preparation in an optical atom tweezer

Optimal recoil-free state preparation in an optical atom tweezer

URL: http://arxiv.org/abs/2411.02262v1
Date: Mon, 04 Nov 2024 16:53:46 GMT
Title: Optimal recoil-free state preparation in an optical atom tweezer
Authors: Lia Kley, Nicolas Heimann, Aslam Parvej, Lukas Broers, Ludwig Mathey,
Abstract summary: We demonstrate the optimal implementation of the transition $|0rangle rightarrow |1rangle$ of two levels, driven by a single-photon Rabi pulse. The Rabi pulse generates a photon recoil of the atom, due to the Lamb-Dicke coupling between the internal and motional degree of freedom. We generate optimal protocols composed of a Rabi protocol and a force protocol, corresponding to dynamically displacing the tweezer.
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Abstract: Quantum computing in atom tweezers requires high-fidelity implementations of quantum operations. Here, we demonstrate the optimal implementation of the transition $|0\rangle \rightarrow |1\rangle$ of two levels, serving as a qubit, of an atom in a tweezer potential, driven by a single-photon Rabi pulse. The Rabi pulse generates a photon recoil of the atom, due to the Lamb-Dicke coupling between the internal and motional degree of freedom, driving the system out of the logical subspace. This detrimental effect is strongly suppressed in the protocols that we propose. Using pulse engineering, we generate optimal protocols composed of a Rabi protocol and a force protocol, corresponding to dynamically displacing the tweezer. We generate these for a large parameter space, from small to large values of the Rabi frequency, and a range of pulse lengths. We identify three main regimes for the optimal protocols, and discuss their properties. In all of these regimes, we demonstrate infidelity well below the current technological standard, thus mitigating a universal challenge in atom tweezers and other quantum technology platforms.

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