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Scientific research
Georgia Institute Of Technology Finds Limits To Ground State Preparation
The document presents a spectral criterion, via space analyticity, that governs when locally implemented dissipation can prepare the ground state of geometrically local free-fermion Hamiltonians. It proves a no-go result for 1D systems with sign-changing Fermi-level crossings, notes higher-dimensional obstructions, and uses quadratic-band-touching models to illustrate locality constraints. It links spectral properties, translation invariance, and momentum-space analysis to the feasibility of local jump operators for ground-state preparation, showing that analytic jump coefficients lead to meromorphic energy relations and potential local dissipation within a dark subspace.