Previously I posted about recent numerical work which suggested that the Hubbard model on the honeycomb lattice and the Heisenberg model on the kagome lattice may have spin liquid ground states. At the Journal Club for Condensed Matter Physics, Steve Kivelson has a nice commentary on these two papers. One point important question he focuses on is whether or not these states have topological order, signified by a degenerate ground state, whose degeneracy only depends on the topology of the lattice [e.g. a torus].
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Superconductivity: a poster child for emergence
Superconductivity beautifully illustrates the characteristics of emergent properties. Novelty. Distinct properties of the superconducting s...

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I welcome discussion on this point. I don't think it is as sensitive or as important a topic as the author order on papers. With rega...
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If you look on the arXiv and in Nature journals there is a continuing stream of people claiming to observe superconductivity in some new mat...
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