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This research demonstrates that controlling energy flow in non-Hermitian quantum systems can be achieved by engineering connectivity within the system's mathematical structure rather than manipulating physical space. By reshaping these internal connections, scientists can induce strong skin localization and govern dynamics in exotic materials where conventional rules fail. This fundamental shift offers new pathways for studying phenomena like quantum scars and fractons, potentially advancing the design of future quantum devices.

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Singapore Team Controls Spectral Amplification Via Connectivity

Quantum ZeitgeistOctober 6, 20265 min read

Until now, controlling energy flow in complex quantum systems relied on manipulating physical space itself. This work reveals how reshaping the connections *within* a system’s underlying mathematical structure, its Hilbert space, fundamentally alters where energy concentrates and amplifies. Interaction-engineered connectivity reshapes competition between amplification channels, yielding dynamics distinct from those observed in conventional materials.

Interaction-engineered connectivity within the structure of many-body systems fundamentally governs how energy amplifies and states become localised. The National University of Singapore investigated this phenomenon in non-Hermitian systems, differing from conventional models through their intricate feedback loops connecting particle symmetries. Zichang Hao, Wen-Tan Xue, and Ching Hua Lee demonstrated that manipulating constraints on particle occupation can induce strong skin localisation even when processes would normally be reciprocal. Energy movement through quantum systems depends heavily on connections within their fundamental structure; this dictates both signal strength and particle confinement. Manipulating these connections enables control over…

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