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quant-ph2026
Evaluation of the quantum Fisher information for large systems via an ancilla
Qi Liu, Xin-Yu Hao, Jing Liu
Quantum Fisher information (QFI) is a fundamental quantity in quantum information and quantum mechanics, and evaluating it in various physical systems has become an important resea…
quant-ph2024★ 5 cited
Enhancing Dynamic Range of Sub-Quantum-Limit Measurements via Quantum Deamplification
Qi Liu, Ming Xue, Matthew Radzihovsky +4
Balancing high sensitivity with a broad dynamic range is a fundamental challenge in measurement science, as improving one often compromises the other. While traditional quantum met…
quant-ph2024
Evaluation of quantum Fisher information for large system
Qi Liu
Quantum Fisher information (QFI) plays a vital role in quantum precision measurement, quantum information, many-body physics, and other domains. Obtaining the QFI from experiment f…