Tootfinder

Quantum Wall States for Noise Mitigation and Eternal Purity Bounds
Miguel Casanova, Francesco Ticozzi
https://arxiv.org/abs/2507.07944 https://

Quantum Wall States for Noise Mitigation and Eternal Purity Bounds
The present work analyzes state-stabilization techniques for decoupling a subsystem from environmental interactions. The proposed framework uses analytical and numerical tools to find an approximate decoherence-free subspace (DFS) with enhanced passive noise isolation. Active state-stabilizing control on a subsystem mediating dominant environmental interactions, which we call wall subsystem, creates an effective quantum wall state. The proposed method controls only the wall subsystem, leaving t…