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Superfluid Density in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">d</mml:mi></mml:math>-Density-Wave Scenario
Recently Chakravarty, Laughlin, Morr, and Nayak [Phys. Rev. B 62, 4880 (2000)] made an interesting proposal that the cuprate superconductors possess a hidden `` $d$-density-wave'' (DDW) order. We study the implication of this proposal for the superfluid density ${\ensuremath{\rho}}_{s}$. We find that it predicts a temperature gradient $|d{\ensuremath{\rho}}_{s}/dT{|}_{T\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0}$ that is …