Maximally entangled fermions
Dirk-M. Schlingemann, Marco Cozzini, Michael Keyl, Lorenzo Campos, Venuti
TL;DR
This paper characterizes maximally entangled fermionic states, specifically quasifree Gaussian states, using covariance matrices, advancing understanding crucial for quantum information processing involving fermions.
Contribution
It provides a complete characterization of maximally entangled quasifree fermion states through covariance matrices, a novel step in fermionic entanglement theory.
Findings
Complete characterization of maximally entangled quasifree fermion states.
Use of covariance matrices to describe entanglement.
Foundation for fermionic entanglement distillation protocols.
Abstract
Fermions play an essential role in many areas of quantum physics and it is desirable to understand the nature of entanglement within systems that consists of fermions. Whereas the issue of separability for bipartite fermions has extensively been studied in the present literature, this paper is concerned with maximally entangled fermions. A complete characterization of maximally entangled quasifree (gaussian) fermion states is given in terms of the covariance matrix. This result can be seen as a step towards distillation protocols for maximally entangled fermions.
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Taxonomy
TopicsQuantum Mechanics and Applications · Relativity and Gravitational Theory · Biofield Effects and Biophysics