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 nonseparable 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.
No takes yet. Share an insight, caveat, or question.
Benatti et al. (2014) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: