Phys. Rev. Lett. 99, 067003 (2007) [4 pages]Theory of the Quantum Critical Fluctuations in Cuprate SuperconductorsReceived 25 October 2006; published 9 August 2007 The statistical mechanics of the time-reversal and inversion symmetry breaking order parameter, possibly observed in the pseudogap region of the phase diagram of the cuprates, can be represented by the Ashkin-Teller model. We add kinetic energy and dissipation to the model for a quantum generalization and show that the spectrum of the quantum-critical fluctuations is of the form postulated in 1989 to give the marginal Fermi-liquid properties. The model solved and the methods devised are likely to be of interest also to other quantum phase transitions. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.067003
DOI:
10.1103/PhysRevLett.99.067003
PACS:
74.72.−h, 71.10.Hf, 74.81.Fa
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