Anomalous non-ergodic scaling in adiabatic multicritical quantum quenches

Details Anomalous non-ergodic scaling in adiabatic multicritical quantum quenches Anomalous non-ergodic scaling in adiabatic multicritical quantum quenches

2009-08-31

arxiv.org/abs/0908.4590v2

Phys. Rev. B 80, 241109(R) (2009)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures, minor change in figure 2

Scientific paper

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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