At the Journal Club for Condensed Matter there is a very nice and clear commentary Identifying a spin liquid on Kagome lattice by quantum entanglement by Ashvin Vishwanath. I learnt a lot from reading it.
It reviews two recent preprints which use numerical methods (density matrix renormalisation group = DMRG) to establish topological order in the ground state of the Heisenberg spin-1/2 model on the Kagome lattice.
An earlier post considered earlier DMRG evidence that was suggestive of a spin liquid, with an energy gap, but did not establish topological order.
Subscribe to:
Post Comments (Atom)
Measuring the social, ethical, and political values of different AI models
I continue to enjoy reading my hard copy of The Economist every week. Occasionally, I post examples of insightful graphics presented in arti...
-
This week Nobel Prizes will be announced. I have not done predictions since 2020 . This is a fun exercise. It is also good to reflect on w... -
The Ising model is a paradigm in both statistical mechanics and condensed matter physics. Today for most theorists it is so familiar that so... -
Nitrogen fluoride (NF) seems like a very simple molecule and you would think it would very well understood, particularly as it is small enou...
The appendices in the Balents paper are great.
ReplyDeleteEntanglement spectra in fractional quantum Hall systems and Chern insulators has popped up a lot over the last couple of years. My understanding is that a gap in the entanglement spectrum can give information about topological order and is some sort of generalization of entanglement entropy (Haldane?).
The commentary by Vishvanath was very helpful.