22 citations · 56 across the 5 of their papers we have counts for
5 papers
From Classical to Quantum Information Geometry: A Guide for Physicists
J. Lambert, E. S. Sørensen
Recently, there has been considerable interest in the application of information geometry to quantum many body physics. This interest has been driven by three separate lines of res…
State Space Geometry of the Spin-1 Antiferromagnetic Heisenberg Chain
J. Lambert, Erik S. Sørensen
We study the phase diagram of the spin-1 antiferromagnetic Heisenberg chain with uniaxial anisotropy and applied magnetic field in terms of the genuine multipartite entanglement as…
Revealing divergent length scales using quantum Fisher information in the Kitaev honeycomb model
James Lambert, Erik S. Sørensen
We compute the quantum Fisher information (QFI) associated with two different local operators in the Kitaev honeycomb model, and find divergent behaviour in the second derivatives…
Quantum fluctuations inhibit symmetry breaking in the HMF model
Ryan Plestid, James Lambert
It is widely believed that mean-field theory is exact for a wide-range of classical long-range interacting systems. Is this also true once quantum fluctuations have been accounted…
Estimates of the Quantum Fisher Information in the Anti-Ferromagnetic Heisenberg Spin Chain with Uniaxial Anisotropy
James Lambert, Erik Sorensen
The quantum Fisher information is of considerable interest not only for quantum metrology but also because it is a useful entanglement measure for finite temperature mixed states.…