Experimental demonstration of enhanced violations of Leggett-Garg inequalities in a 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="script">PT</mml:mi></mml:math>
-symmetric trapped-ion qubit

Lu, Pengfei; Rao, Xinxin; Liu, Teng; Liu, Yang; Bian, Ji; Zhu, Feng; Luo, Le

doi:10.1103/physreva.109.042205

Phys. Rev. A

2024

DOI: 10.1103/physreva.109.042205

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Experimental demonstration of enhanced violations of Leggett-Garg inequalities in a PT -symmetric trapped-ion qubit

Pengfei Lu,

Xinxin Rao,

Teng Liu

et al.

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“…Here, the term Tr (𝜎𝑧𝜌nor) represents a nonlinear factor that induces non-uniform evolution dynamics. [23][24][25] This is illustrated by the uneven evolution speeds shown in Fig. 4, where the subtraction of the normalized popula- This indicates that the uneven flipping induced by the nonlinear term becomes more pronounced.…”

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confidence: 99%

Non-Hermitian CHSH* Game with a Single Trapped-Ion Qubit

Song 宋,

Liu 刘,

Bian 边

et al. 2024

Chinese Phys. Lett.

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The Clauser-Horne-Shimony-Holt (CHSH) game provides a captivating illustration of the advantages of quantum strategies over classical ones. In a recent study, a variant of the CHSH game leveraging a single qubit system, referred to as the CHSH* game, has been identified. We demonstrate that this mapping relationship between these two games remains effective even for a non-unitary gate. In this context, we delve into the breach of Tsirelson’s bound in a nonHermitian system, predicting changes in the upper and lower bounds of the player’s winning probability when employing quantum strategies in a single dissipative qubit system. We experimentally explore the impact of the CHSH* game on the player's winning probability in a single trapped-ion dissipative system, demonstrating a violation of Tsirelson's bound under the influence of parity-time (PT) symmetry. These results contribute to a deeper understanding of the influence of non-Hermitian systems on quantum games and the behavior of quantum systems under PT symmetry, which is crucial for designing more robust and efficient quantum protocols.

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confidence: 99%

Non-Hermitian CHSH* Game with a Single Trapped-Ion Qubit

Song 宋,

Liu 刘,

Bian 边

et al. 2024

Chinese Phys. Lett.

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Experimental demonstration of enhanced violations of Leggett-Garg inequalities in a PT -symmetric trapped-ion qubit

Cited by 1 publication

References 42 publications

Non-Hermitian CHSH* Game with a Single Trapped-Ion Qubit

Non-Hermitian CHSH* Game with a Single Trapped-Ion Qubit

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