3 papers
quant-ph2026
Fragility of Optimal Measurements due to Noise in Probe States for Quantum Sensing
Andrew Kolmer Forbes, Marco A. Rodríguez-García, Ivan H. Deutsch
For a given quantum state used in sensing, the quantum Cramér-Rao bound (QCRB) sets a fundamental limit on the precision achievable by an unbiased estimator of an unknown parameter…
quant-ph2025
Long-Range Interacting Many-Body Systems in the Irrep Basis
Ivy Pannier-Günther, Andrew Kolmer Forbes, Pablo M. Poggi +1
Spin models featuring infinite-range, homogeneous all-to-all interactions can be efficiently described due to the existence of a symmetry-restricted Hilbert subspace and an underly…
quant-ph2025
A Hybrid Measurement Scheme for Generating nonGaussian Spin States
Andrew Kolmer Forbes, Ivan H. Deutsch
We present a protocol for generating nonclassical states of atomic spin ensembles through the backaction induced by a hybrid measurement of light that is entangled with atoms, comb…