Entanglement in fermion systems and quantum metrology
Quantum Physics
2014-03-20 v1 High Energy Physics - Theory
Abstract
Entanglement in fermion many-body systems is studied using a generalized definition of separability based on partitions of the set of observables, rather than on particle tensor products. In this way, the characterizing properties of non-separable fermion states can be explicitly analyzed, allowing a precise description of the geometric structure of the corresponding state space. These results have direct applications in fermion quantum metrology: sub-shot noise accuracy in parameter estimation can be obtained without the need of a preliminary state entangling operation.
Keywords
Cite
@article{arxiv.1403.1144,
title = {Entanglement in fermion systems and quantum metrology},
author = {F. Benatti and R. Floreanini and U. Marzolino},
journal= {arXiv preprint arXiv:1403.1144},
year = {2014}
}
Comments
26 pages, LaTeX