Experimental demonstration of enhanced violations of Leggett-Garg inequalities in a $\mathcal{P}\mathcal{T}$-symmetric trapped-ion qubit

Pengfei Lu, Xinxin Rao, Teng Liu +4

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 LGIs…