8 papers
Fisher geometry reshapes the effect of incompatibility in multiparameter quantum estimation
Jiayu He, Matteo G. A. Paris
Multiparameter quantum estimation faces two fundamental obstacles: sloppiness, i.e., anisotropy of the quantum Fisher information matrix (QFIM) that renders some parameter directio…
Temporal modulation as a resource: enhanced frequency estimation in continuous variable systems
Ningxin Kong, Qiongyi He, Matteo G. A. Paris
Frequency estimation, a cornerstone of quantum metrology, has been significantly enhanced by advanced quantum sensing strategies. However, most protocols rely either on static or t…
Enhanced quantum metrology by criticality-assisted noncommutative preparation
Ningxin Kong, Matteo G. A. Paris, Qiongyi He
Quantum criticality is a resource for quantum-enhanced metrology, but existing schemes face intrinsic limitations. These arise because using criticality directly in the encoding dy…
Shake before use: universal enhancement of quantum thermometry by unitary driving
Emanuele Tumbiolo, Lorenzo Maccone, Chiara Macchiavello +2
Quantum thermometry aims at determining temperature with ultimate precision in the quantum regime. Standard equilibrium approaches, limited by the Quantum Fisher Information given…
Multi-Parameter Multi-Critical Metrology of the Dicke Model
Luca Previdi, Yilun Xu, Qiongyi He +1
Critical quantum metrology exploits the hypersensitivity of quantum systems near phase transitions to achieve enhanced precision in parameter estimation. While single-parameter est…
Optimizing quantum sensing networks via genetic algorithms and deep learning
Asghar Ullah, Ãzgür E. MüstecaplıoÄlu, Matteo G. A. Paris
We investigate the optimization of graph topologies for quantum sensing networks designed to estimate weak magnetic fields. The sensors are modeled as spin systems governed by a tr…