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This research resolves long-standing ambiguities in calculating geometric phases for open paths by introducing a coordinate-free mathematical framework that uniquely defines the solid angle associated with qubit state evolution. By grounding these calculations in rigorous mathematics rather than experimental approximations, the study provides a more precise foundation for manipulating polarization states and enhancing qubit fidelity. This advancement directly addresses fundamental challenges in quantum control theory, offering improved predictability for future quantum hardware development.
Kyungpook Team Defines Qubit Path Ambiguity with Monopole Connection

Previously, calculating quantum mechanical phases along open paths admitted infinitely many solutions, hindering precise control of systems like qubits. Now, displacing level degeneracy closes these paths with a uniquely defined solid angle Ω(εu) = Ω[C] + 2α + O(ε), establishing a verifiable computation for previously approximate methods. This coordinate-free derivation provides a foundation for manipulating polarisation states and improving qubit fidelity.
A computable method now determines geometric phases along open paths; previously, infinitely many geodesics could close such paths leading to ambiguous calculations. It resolves this ambiguity by defining how displacing a system's degeneracy closes the path with a predictable solid angle dependent on its curvature at that point. A precise method for calculating geometric phases, fundamental properties influencing quantum systems such as qubits and spin particles, defines these phases. Previously, calculations relied…
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