Fisher information as an indicator of quantum phenomena
Year: 2018
Type: preprint
Abstract: Fisher information quantifies how well we can detect small changes in a parameter. According to the parameter that we focus on, the Fisher information presents different quantum phenomena. Here we investigate quantum interference of two particles in a two-wave mixing operation. Due to the symmetry of the two-wave mixing operation, we construct the Fisher information only by counting the number of particles in one of the output modes. When we focus on an input state parameter, we cannot discriminate particle species, i.e., boson and fermion, but can observe Hong-Ou-Mandel effect. When we focus on a parameter of the two-wave mixing operation, on the other hand, we can discriminate the particle species and extend it to detect two-particle entanglement scenario.
Source: arXiv (Cornell University)
Authors: Su-Yong Lee, Jeongho Bang, Jaewan Kim
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2893469136