A quantum-instrument framework shows that nonlocality sharing is limited by Kraus-structure-dependent back-action, enabling unbounded unilateral sharing across many observers and some bilateral sharing.
Consider the small-angle limitϕ→0 + with the parametrizationsε=ϕ e andξ= cos 2θ≡sinϕ, which fixes the initial entanglement angle atθ= π 4 − ϕ 2
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Unified Framework for Quantum Resource Recycling via Instrument-Dependent Back-action
A quantum-instrument framework shows that nonlocality sharing is limited by Kraus-structure-dependent back-action, enabling unbounded unilateral sharing across many observers and some bilateral sharing.