Experimental Quantum Advantage in the Odd-Cycle Game

• URL: http://arxiv.org/abs/2406.08412v2
• Date: Sun, 06 Oct 2024 15:48:32 GMT
• Title: Experimental Quantum Advantage in the Odd-Cycle Game
• Authors: P. Drmota, D. Main, E. M. Ainley, A. Agrawal, G. Araneda, D. P. Nadlinger, B. C. Nichol, R. Srinivas, A. Cabello, D. M. Lucas,
• Abstract summary: We report the first experimental demonstration of the odd-cycle game. We entangle two ions separated by 2 m and the players use them to win the game with a probability 26 sigma above that allowed by the best classical strategy.
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• Abstract: We report the first experimental demonstration of the odd-cycle game. We entangle two ions separated by ~2 m and the players use them to win the odd-cycle game with a probability ~26 sigma above that allowed by the best classical strategy. The experiment implements the optimal quantum strategy, is free of loopholes, and achieves 97.8(3) % of the theoretical limit to the quantum winning probability. We perform the associated Bell test and measure a nonlocal content of 0.54(2) -- the largest value for physically separate devices, free of the detection loophole, ever observed.

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