42 citations · 67 across the 2 of their papers we have counts for
2 papers
quant-ph2012★ 25 cited
Computing complexity measures for quantum states based on exponential families
Sönke Niekamp, Tobias Galla, Matthias Kleinmann +1
Given a multiparticle quantum state, one may ask whether it can be represented as a thermal state of some Hamiltonian with k-particle interactions only. The distance from the expon…
hep-th2009★ 42 cited
The XXZ model with anti-periodic twisted boundary conditions
Sönke Niekamp, Tobias Wirth, Holger Frahm
We derive functional equations for the eigenvalues of the XXZ model subject to anti-diagonal twisted boundary conditions by means of fusion of transfer matrices and by Sklyanin's m…