2 papers
cond-mat.quant-gas2019
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…
cond-mat.str-el2018
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.…