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pro vyhledávání: '"Faba, Javier"'
The performance of beyond mean field methods in solving the quantum many body problem for fermions is usually characterized by the correlation energy measured with respect to the underlying mean field value. In this paper we address the issue of char
Externí odkaz:
http://arxiv.org/abs/2203.09400
Publikováno v:
Phys. Rev. A 104, 032428 (2021)
Typically in many-body systems the correlation energy, which is defined as the difference between the exact ground state energy and the mean-field solution, has been a measure of the system's total correlations. However, under the quantum information
Externí odkaz:
http://arxiv.org/abs/2106.15993
Publikováno v:
Phys. Rev. A 103, 032426 (2021)
A simple expression to compute the quantum discord between two orbitals in fermion systems is derived using the parity superselection rule. As the correlation between orbitals depends on the basis chosen, we discuss a special orbital basis, the natur
Externí odkaz:
http://arxiv.org/abs/2012.01292
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