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Javid Naikoo

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Preprint Aug 2026

Entanglement depth and ancilla efficiency in quantum channel estimation

We study the role of ancillary entanglement in quantum channel parameter estimation and investigate the minimal ancilla dimension required to achieve the maximum Fisher information. We introduce the $k$-ancilla Fisher information, which quantifies the optimal estimation precision achievable with input states of rank at...

Javid Naikoo · 0 citations