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quant-ph2024★ 1 cited
Quantum causal inference via scattering circuits in NMR
Hongfeng Liu, Xiangjing Liu, Qian Chen +5
We report NMR scattering circuit experiments that reveal causal structure. The scattering circuit involves interacting a probe qubit with the system of interest and finally measuri…
quant-ph2024★ 1 cited
Experimental demonstration of quantum causal inference via noninvasive measurements
Hongfeng Liu, Xiangjing Liu, Qian Chen +5
We probe the foundations of causal structure inference experimentally. The causal structure concerns which events influence other events. We probe whether causal structure can be d…
quant-ph2023
Inferring the arrow of time in quantum spatiotemporal correlations
Xiangjing Liu, Qian Chen, Oscar Dahlsten
We consider how to tell the time-ordering associated with measurement data from quantum experiments at two times and any number of qubits. We define an arrow of time inference prob…