82 citations · 378 across the 26 of their papers we have counts for
21 papers · 1 filter
Schwinger-Keldysh effective actions for non-hydrodynamic poles and branch cuts
Andrea Amoretti, Matteo Anselmi, Daniel K. Brattan
Retarded thermal correlators, analytically continued to complex frequency, exhibit non-hydrodynamic poles and branch cuts that constrain hydrodynamics. We construct Gaussian Schwin…
Linear response beyond hydrodynamic poles
Andrea Amoretti, Daniel K. Brattan, Jonas Rongen
We consider the problem of writing an effective, linearised theory in small derivatives that reproduces the Mittag-Leffler expansion of a charge current correlator with an arbitrar…
A new web of dualities from Majorana Fermions
Andrea Amoretti, Matteo Anselmi, Daniel K. Brattan
We explore new infrared dualities in -dimensional quantum field theories involving Majorana fermions. Building on the recently proposed operator-deformation approach to boso…
Relaxation terms for anomalous hydrodynamic transport in Weyl semimetals from kinetic theory
Andrea Amoretti, Daniel K. Brattan, Luca Martinoia +2
We consider as a model of Weyl semimetal thermoelectric transport a -dimensional charged, relativistic and relaxed fluid with a chiral anomaly. We…
Restoring time-reversal covariance in relaxed hydrodynamics
Andrea Amoretti, Daniel K. Brattan, Luca Martinoia +1
In hydrodynamics, for generic relaxations, the stress tensor and charge current two-point functions are not time-reversal covariant. This remains true even if the Martin-Kad…
Leading order magnetic field dependence of conductivities in anomalous hydrodynamics
Andrea Amoretti, Daniel K. Brattan, Luca Martinoia +1
We show that literature results claimed for the magnetic field dependence of the longitudinal conductivity in anomalous first-order hydrodynamics are frame dependent at this deriva…
Non-dissipative electrically driven fluids
Andrea Amoretti, Daniel K. Brattan, Luca Martinoia +1
Existing hydrodynamic models of charged fluids consider any external electric field acting on the fluid as either first order in the hydrodynamic derivative expansion and completel…
On the hydrodynamics of (2 + 1)-dimensional strongly coupled relativistic theories in an external magnetic field
Andrea Amoretti, Daniel K. Brattan
In this paper we review recent progress on relativistic hydrodynamics in (2 + 1)-dimensions with an external magnetic field. We discuss the formalism allowing for momentum loss due…
Hydrodynamic magneto-transport in holographic charge density wave states
Andrea Amoretti, Daniel Arean, Daniel K. Brattan +1
We employ hydrodynamics and gauge/gravity to study magneto-transport in phases of matter where translations are broken (pseudo-)spontaneously. First we provide a hydrodynamic descr…
Hydrodynamic magneto-transport in charge density wave states
Andrea Amoretti, Daniel Arean, Daniel K. Brattan +1
In this paper we study the dynamical properties of charged systems immersed in an external magnetic field and perturbed by a set of scalar operators breaking translations either sp…
Magneto-thermal transport implies an incoherent Hall conductivity
Andrea Amoretti, Daniel K. Brattan, Nicodemo Magnoli +1
We consider magnetohydrodynamics with an external magnetic field. We find that in general one must allow for a non-zero incoherent Hall conductivity to correctly describe the DC lo…
The curious behaviour of the scale invariant -dimensional Lifshitz scalar
Daniel K. Brattan
We demonstrate the existence of an exactly marginal deformation, with derivative coupling, about the free theory of a -dimensional charged, Lifshitz scalar with dynamic crit…
On the landscape of scale invariance in quantum mechanics
Daniel K. Brattan, Omrie Ovdat, Eric Akkermans
We consider the most general scale invariant radial Hamiltonian allowing for anisotropic scaling between space and time. We formulate a renormalisation group analysis of this syste…
supersymmetry and anisotropic scale invariance
Daniel K. Brattan
We find a class of scale-anomaly-free supersymmetric quantum systems with non-vanishing potential terms where space and time scale with distinct exponents. Our resu…
Scale anomaly of a Lifshitz scalar: a universal quantum phase transition to discrete scale invariance
Daniel K. Brattan, Omrie Ovdat, Eric Akkermans
We demonstrate the existence of a universal transition from a continuous scale invariant phase to a discrete scale invariant phase for a class of one-dimensional quantum systems wi…
Drag phenomena from holographic massive gravity
Matteo Baggioli, Daniel K. Brattan
We consider the motion of point particles in a strongly coupled field theory with broken translation invariance. We obtain the energy and momentum loss rates and drag coefficients…
A strongly coupled anyon material
Daniel K. Brattan
We use alternative quantisation of the D3-D5 system to explore properties of a strongly coupled anyon material at finite density and temperature. We study the transport properties…
Collective Excitations of Holographic Quantum Liquids in a Magnetic Field
Daniel K. Brattan, Richard A. Davison, Simon A. Gentle +1
We use holography to study N=4 supersymmetric SU(Nc) Yang-Mills theory in the large-Nc and large-coupling limits coupled to a number Nf << Nc of (n+1)-dimensional massless supersym…
CFT dual of the AdS Dirichlet problem: Fluid/Gravity on cut-off surfaces
Daniel K. Brattan, Joan Camps, R. Loganayagam +1
We study the gravitational Dirichlet problem in AdS spacetimes with a view to understanding the boundary CFT interpretation. We define the problem as bulk Einstein's equations with…
Shear channel correlators from hot charged black holes
Daniel K. Brattan, Simon A. Gentle
We compute numerically the full retarded Green's functions for conserved currents in the shear channel of a (2+1)-dimensional field theory at non-zero temperature and density. This…
Charged, conformal non-relativistic hydrodynamics
Daniel K. Brattan
We embed a holographic model of an U(1) charged fluid with Galilean invariance in string theory and calculate its specific heat capacity and Prandtl number. Such theories are gener…