3 papers
quant-ph2026
Measuring unconventional causal structures in monitored dynamics
Hong-Yi Wang, Haifeng Tang, Xiao-Liang Qi
Causality underpins all logical reasoning. However, the causal structure in quantum processes can be far from intuitive, often differing from its classical counterpart in relativit…
quant-ph2025
Estimating time in quantum chaotic systems and black holes
Haifeng Tang, Shreya Vardhan, Jinzhao Wang
We characterize new universal features of the dynamics of chaotic quantum many-body systems, by considering a hypothetical task of "time estimation." Most macroscopic observables i…
quant-ph2025
Measurement induced scrambling and emergent symmetries in random circuits
Haifeng Tang, Hong-Yi Wang, Zhong Wang +1
Quantum entanglement is affected by unitary evolution, which spreads the entanglement through the whole system, and also by measurements, which usually tends to disentangle subsyst…