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quant-ph2026
Ward-Takahashi Identity and Gauge-Invariant Response Theory for Open Quantum Systems
Hongchao Li, Xie-Hang Yu, Masaya Nakagawa +1
We derive the Ward-Takahashi identity and establish the gauge-invariant response theory for open quantum systems described by Lindbladians to show that particle-number conservation…
quant-ph2025
Optimizing digital quantum simulation of open quantum lattice models
Xie-Hang Yu, Hongchao Li, J. Ignacio Cirac +1
Many-body systems arising in condensed matter physics and quantum optics inevitably couple to the environment and need to be modelled as open quantum systems. While near-optimal al…