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quant-ph2026
Root-system structure of sloppiness in passive Gaussian metrology
A. Kafuri, B. M. Rodriguez-Lara
Passive transformations of an -mode squeezed probe become locally unidentifiable when the quantum Fisher matrix loses rank. For pure zero-mean Gaussian probes, we show that the…
quant-ph2026
Conditional Gaussian filtering by Arthurs--Kelly readout in a three-mode cluster wire
B. M. Rodríguez-Lara, J. A. Mendoza-Fierro
Measurement readout programs the Gaussian operation implemented by a continuous-variable cluster wire. For the standard three-node wire, momentum homodyne readout gives an additive…