84 citations · 334 across the 16 of their papers we have counts for
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The Coupled Cluster Method and Entanglement
Péter Lévay, Szilvia Nagy, János Pipek +1
The Coupled Cluster (CC) and full CI expansions are studied for three fermions with six and seven modes. Surprisingly the CC expansion is tailor made to characterize the usual SLOC…
On an economic prediction of the finer resolution level wavelet coefficients in electron structure calculations
Szilvia Nagy, János Pipek
In wavelet based electron structure calculations introducing a new, finer resolution level is usually an expensive task, this is why often a two-level approximation is used with ve…
A study of two-qubit density matrices with fermionic purifications
Szilárd Szalay, Péter Lévay, Szilvia Nagy +1
We study 12 parameter families of two qubit density matrices, arising from a special class of two-fermion systems with four single particle states or alternatively from a four-qubi…
An elementary formula for entanglement entropies of fermionic systems
Péter Lévay, Szilvia Nagy, János Pipek
An elementary formula for the von Neumann and Renyi entropies describing quantum correlations in two-fermionic systems having four single particle states is presented. An interesti…