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arXiv · 2601.23043

Dicke superposition probes for noise-resilient Heisenberg and super-Heisenberg Metrology

Sudha·B. N. Karthik·K. S. Akhilesh·A. R. Usha Devi
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Abstract

Phase sensing with entangled multi-qubit states in the presence of noise is a central theme of modern quantum metrology. The present work investigates Dicke state superposition probes for quantum phase sensing under parameter encoding generated by one- and two-body interaction Hamiltonians. Under linear collective-spin encoding, near-optimal Dicke superposition states are shown to exhibit significantly enhanced robustness against phase damping noise compared with Greenberger--Horne--Zeilinger (GHZ), W-superposition, and balanced Dicke states, while maintaining favorable metrological performance under realistic decoherence channels. For two-body interactions, optimal probe states maximizing the quantum Fisher information are identified. Their noise resilience and metrological scaling behaviour under phase damping, amplitude damping, and global depolarizing channels are analyzed. The associated near-optimal Dicke superposition states are found to exhibit improved resilience to phase damping, for the system sizes considered. These results establish tailored near-optimal Dicke state superposition probes as versatile and noise-resilient resources for Heisenberg and super-Heisenberg quantum phase sensing governed by one- and two-body interactions.

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Sudha, B. N. Karthik, K. S. Akhilesh, A. R. Usha Devi. 2026-01-30. Dicke superposition probes for noise-resilient Heisenberg and super-Heisenberg Metrology. https://arxiv.org/abs/2601.23043

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