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      Anomalous non-ergodic scaling in adiabatic multicritical quantum quenches

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          Abstract

          We investigate non-equilibrium dynamical scaling in adiabatic quench processes across quantum multicritical points. Our analysis shows that the resulting power-law scaling depends sensitively on the control path, and that anomalous critical exponents may emerge depending on the universality class. We argue that the observed anomalous behavior originates in the fact that the dynamical excitation process takes place asymmetrically with respect to the static multicritical point, and that non-critical energy modes may play a dominant role. As a consequence, dynamical scaling requires introducing new non-static exponents.

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          Author and article information

          Journal
          31 August 2009
          2009-09-01
          Article
          10.1103/PhysRevB.80.241109
          0908.4590
          1df463f1-6ba1-4f43-83b3-2f0e5b632dca

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

          History
          Custom metadata
          Phys. Rev. B 80, 241109(R) (2009)
          4 pages, 4 figures, minor change in figure 2
          cond-mat.stat-mech quant-ph

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