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

P Lu, X Rao, T Liu, Y Liu, J Bian, F Zhu, L Luo - Physical Review A, 2024 - APS
The Leggett-Garg inequality (LGI) delineates a boundary between quantum and classical
systems. While the temporal quantum correlations represented by LGIs have been …

Observation of quantum temporal correlations well beyond Lüders bound

CW Wu, MC Zhang, YL Zhou, T Chen, R Huang… - Physical Review …, 2025 - APS
The ability of achieving strong quantum spatial correlations has helped the emergence of
quantum information science. In contrast, how to achieve strong quantum temporal …

Maximizing temporal quantum correlation by approaching an exceptional point

CW Wu, MC Zhang, YL Zhou, T Chen, R Huang… - arxiv preprint arxiv …, 2023 - arxiv.org
Quantum correlations, both spatial and temporal, are the central pillars of quantum
mechanics. Over the last two decades, a big breakthrough in quantum physics is its complex …

Quantum state engineering in three-level systems via Lewis-Riesenfeld invariants

XM Yu, K Zhou, HY Zhang, SX Li, Z Huang, J Wen… - Physical Review A, 2025 - APS
Coherent manipulation of three-level systems is of critical significance to quantum
information processing. Here, we propose a scheme to achieve quantum state engineering …

Resonant fluorescence of a bichromatically driven three-level atom with the electron shelving effect

J Li, Y Yang - Physical Review A, 2024 - APS
The electron shelving effect significantly improves the control accuracy of medium energy
level transitions, enabling high-sensitivity fluorescence signal detection in precision …

Observation of quantum-classical transition behavior of LGI in a dissipative quantum gas

Q Peng, B Jiao, H Yu, L Sun, H Zhang, J Li… - arxiv preprint arxiv …, 2024 - arxiv.org
The Leggett-Garg inequality (LGI) is a powerful tool for distinguishing between quantum and
classical properties in studies of macroscopic systems. Applying the LGI to non-Hermitian …

Bell's theorem in time without inequalities

MM Ali - Europhysics Letters, 2023 - iopscience.iop.org
Bell's theorem revealed that a local hidden-variable model cannot completely reproduce the
quantum mechanical predictions. Bell's inequality provides an upper bound under the …

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

P Lu, X Rao, T Liu, Y Liu, J Bian, F Zhu… - arxiv preprint arxiv …, 2023 - arxiv.org
The Leggett-Garg inequality (LGI) places a bound for the distinction between quantum
systems and classical systems. Despite that the tests of temporal quantum correlations on …

Fractional Conformal Map, Qubit Dynamics and the Leggett-Garg Inequality

S Paul, AV Varma, S Das - arxiv preprint arxiv:2401.10602, 2024 - arxiv.org
Any pure state of a qubit can be geometrically represented as a point on the extended
complex plane through stereographic projection. By employing successive conformal maps …

Non-Hermitian quantum correlations in the time domain: well beyond Luders bound

PX Chen, C Wu, MC Zhang, YL Zhou, T Chen… - 2023 - researchsquare.com
The powerful ability of achieving and manipulating strong spatial quantum correlations has
helped the emergence of quantum information science. In contrast, strong temporal quantum …