7825572
Non-Relativistic Superstring Theories
We construct a supersymmetric version of the 'critical' non-relativistic bosonic string theory [1] with its manifest global symmetry. We introduce the anticommuting bc CFT which is the super partner of the {beta}{gamma} CFT. The conformal weights of the b and c fields are both 1/2. The action of the fermionic sector can be transformed into that of the relativistic superstring theory. We explicitly quantize the theory with manifest SO(8) symmetry and find that the spectrum is similar to that of Type IIB superstring theory. There is one notable difference: the fermions are non-chiral. We further consider 'noncritical' generalizations of the supersymmetric theory using the superspace formulation. There is an infinite range of possible string theories similar to the supercritical string theories. We comment on the connection between the critical non-relativistic string theory and the lightlike Linear Dilaton theory.
119213544
Aging logarithmic conformal field theory: a holographic view
A bstractWe consider logarithmic extensions of the correlation and response functions of scalar operators for the systems with aging as well as Schrödinger symmetry. Aging is known to be the simplest nonequilibrium phenomena, and its physical significances can be understood by the two-time correlation and response functions. Their logarithmic part is completely fixed by the bulk geometry in terms of the conformal weight of the dual operator and the dual particle number.Motivated by recent experimental realizations of Kardar-Parisi-Zhang universality class in growth phenomena and its subsequent theoretical extension to aging, we investigate our two-time correlation functions out of equilibrium, which show several qualitatively different behaviors depending on the parameters in our theory. They exhibit either growing or aging, i.e. power-law decaying, behaviors for the entire range of our scaling time. Surprisingly, for some parameter ranges, they exhibit growing at early times as well as aging at later times.
8879998
World Sheet Commuting beta-gamma CFT and Non-Relativistic StringTheories
We construct a sigma model in two dimensions with Galilean symmetry in flat target space similar to the sigma model of the critical string theory with Lorentz symmetry in 10 flat spacetime dimensions. This is motivated by the works of Gomis and Ooguri[1] and Danielsson et. al.[2, 3]. Our theory is much simpler than their theory and does not assume a compact coordinate. This non-relativistic string theory has a bosonic matter {beta}{gamma} CFT with the conformal weight of {beta} as 1. It is natural to identify time as a linear combination of {gamma} and {bar {gamma}} through an explicit realization of the Galilean boost symmetry. The angle between {gamma} and {bar {gamma}} parametrizes one parameter family of selection sectors. These selection sectors are responsible for having a non-relativistic dispersion relation without a nontrivial topology in the non-relativistic setup, which is one of the major differences from the previous works[1, 2, 3]. This simple theory is the non-relativistic analogue of the critical string theory, and there are many different avenues ahead to be investigated. We mention a possible consistent generalization of this theory with different conformal weights for the {beta}{gamma} CFT. We also mention supersymmetric generalizations of these theories.
55242680
Holographic quantum criticality and strange metal transport
A holographic model of a quantum critical theory at a finite but low temperature and a finite density is studied. The model exhibits non-relativistic z = 2 Schr¨ odinger symmetry and is realized by the anti- de-Sitter-Schwarzschild black hole in light-cone coordinates. Our approach addresses the electrical conductivities in the presence or absence of an applied magnetic field and contains a control parameter that can be associated with quantum tuning via charge carrier doping or an external field in correlated electron systems. The Ohmic resistivity, the inverse Hall angle, the Hall coefficient and magnetoresistance are shown to be in good agreement with experimental results of strange metals at very low temperature. The holographic model also predicts new scaling relations in the presence of a magnetic field.
118450242
Charged Dilatonic Black Holes and their Transport Properties
Crete Center for Theoretical Physics, Department of Physics, University of Crete, 71003 Heraklion, GreeceKey words Dilatonic Black Holes, Transport Properties, Effective Holographic Theories.We brieﬂy explain the consistency conditions imposed on the effective holographic theories, which are pa-rameterized by two real exponents (γ,δ)that control the IR dynamics. The general scaling of DC resistivitywith temperature at low temperature and AC conductivity at low frequency across the whole (γ,δ)planeare explained. There is a codimension-one region where the DC resistivity is linear in the temperature. Formassive carriers, it is shown that when the scalar operator is not the dilaton, the DC resistivity scales as theheat capacity (and entropy) for (2+1)-dimensional systems. Regions are identiﬁed where the theory atﬁnite density is a Mott-like insulator. This contribution is based on [C. Charmousis, et al. JHEP 1011, 151(2010)] [1] with emphasis on the transport properties of charged dilatonic black holes with potential.
15669145
Aspects of Puff Field Theory
We describe some features of the recently constructed ``Puff Field Theory,'' and present arguments in favor of it being a field theory decoupled from gravity. We construct its supergravity dual and calculate the entropy of this theory in the limit of large 't Hooft coupling. We also determine the leading irrelevant operator that governs its deviation from = 4 super Yang-Mills theory.
117807581
J/$\psi$ suppression with respect to the reaction plane in Au+Au collisions at $\sqrt{s}$=200 GeV by the PHENIX detector