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quant-ph2026
State preparation via measurement and feedback: pushing relations, state structures, and non-invertible symmetries
Yabo Li, Aditi Mitra, Tsung-Cheng Lu
Quantum circuits with measurements and unitary feedback (MF) can prepare long-range entangled states in constant depth, but a systematic construction of the MF preparation circuit…
quant-ph2026
Mixed-State Long-Range Entanglement from Dimensional Constraints
Leonardo A. Lessa, Tsung-Cheng Lu
We present a new mechanism for long-range entanglement (LRE) in strongly symmetric many-body mixed states that does not rely on symmetry anomalies or long-range correlations. Our p…
quant-ph2025
Higher-form anomaly and long-range entanglement of mixed states
Leonardo A. Lessa, Shengqi Sang, Tsung-Cheng Lu +2
In open quantum systems, we directly relate anomalies of higher-form symmetries to the long-range entanglement of any mixed state with such symmetries. First, we define equivalence…