82 citations · 378 across the 26 of their papers we have counts for
29 papers
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…
The price of locality: Maxwell-Cattaneo charge transport in Schwinger-Keldysh effective field theory
Andrea Amoretti, Matteo Anselmi, Daniel K. Brattan
We determine the conditions under which the nonlinear Maxwell-Cattaneo theory of charge transport admits a local Gaussian Schwinger-Keldysh embedding with a particular modified dyn…
Staying positive: bounds for non-Gaussian noise in Schwinger-Keldysh effective field theory
Andrea Amoretti, Daniel K. Brattan
Modern effective field theories of dissipative hydrodynamics, built on the Schwinger-Keldysh (SK) formalism, include thermal noise that is not Gaussian. The resultant higher-order…
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…
The Hamiltonian mechanics of exotic particles
Andrea Amoretti, Daniel K. Brattan, Luca Martinoia
We develop Hamiltonian mechanics on Aristotelian manifolds, which lack local boost symmetry and admit absolute time and space structures. We construct invariant phase space dynamic…
Dissipative electrically driven fluids
Andrea Amoretti, Daniel K. Brattan, Luca Martinoia +1
We consider entropy generating flows for fluids that achieve a steady state in the presence of a driving electric field. Having chosen one among the space of stationarity constrain…
Thermodynamic constraints and exact scaling exponents of flocking matter
Andrea Amoretti, Daniel K. Brattan, Luca Martinoia
We use advances in the formalism of boost agnostic passive fluids to constrain transport in polar active fluids, which are subsequently described by the Toner-Tu equations. Acknowl…
Relaxed hydrodynamic theory of electrically driven non-equilibrium steady states
Daniel K. Brattan, Masataka Matsumoto, Matteo Baggioli +1
The capability of hydrodynamics to accurately describe slow and long-wavelength fluctuations around non-equilibrium steady states (NESS), characterized by a stationary flow of ener…
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…
Destroying superconductivity in thin films with an electric field
Andrea Amoretti, Daniel K. Brattan, Nicodemo Magnoli +3
In this paper we use a Ginzburg-Landau approach to show that a suitably strong electric field can drive a phase transition from a superconductor to a normal metal. The transition i…
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…
A hydrodynamical description for magneto-transport in the strange metal phase of Bi-2201
Andrea Amoretti, Martina Meinero, Daniel K. Brattan +7
High temperature superconductors are strongly coupled systems which present a complicated phase diagram with many coexisting phases. This makes it difficult to understand the mecha…
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…