71 citations · 865 across the 38 of their papers we have counts for
32 papers · 1 filter
Carrollian fluids and spontaneous breaking of boost symmetry
Jay Armas, Emil Have
In the hydrodynamic regime, field theories typically have their boost symmetry spontaneously broken due to the presence of a thermal rest frame although the associated Goldstone fi…
Approximate higher-form symmetries, topological defects, and dynamical phase transitions
Jay Armas, Akash Jain
Higher-form symmetries are a valuable tool for classifying topological phases of matter. However, emergent higher-form symmetries in interacting many-body quantum systems are not t…
A stable and causal model of magnetohydrodynamics
Jay Armas, Filippo Camilloni
We formulate the theory of first-order dissipative magnetohydrodynamics in an arbitrary hydrodynamic frame under the assumption of parity-invariance and discrete charge symmetry. W…
Approximate symmetries, pseudo-Goldstones, and the second law of thermodynamics
Jay Armas, Akash Jain, Ruben Lier
We propose a general hydrodynamic framework for systems with spontaneously broken approximate symmetries. The second law of thermodynamics naturally results in relaxation in the hy…
Effective field theory for hydrodynamics without boosts
Jay Armas, Akash Jain
We formulate the Schwinger-Keldysh effective field theory of hydrodynamics without boost symmetry. This includes a spacetime covariant formulation of classical hydrodynamics withou…
Thermal transitions of metastable M-branes
Jay Armas, Nam Nguyen, Vasilis Niarchos +1
We use blackfold methods to analyse the properties of putative supergravity solutions in M-theory that describe the backreaction of polarised anti-M2 branes (namely, M5 branes wrap…
One-form superfluids and magnetohydrodynamics
Jay Armas, Akash Jain
We use the framework of generalised global symmetries to study various hydrodynamic regimes of hot electromagnetism. We formulate the hydrodynamic theories with an unbroken or a sp…
Magnetohydrodynamics as superfluidity
Jay Armas, Akash Jain
We show that relativistic magnetohydrodynamics (MHD) can be recast as a novel theory of superfluidity. This new theory formulates MHD just in terms of conservation equations, inclu…
Dissipative hydrodynamics with higher-form symmetry
Jay Armas, Jakob Gath, Akash Jain +1
A theory of parity-invariant dissipative fluids with -form symmetry is formulated to first order in a derivative expansion. The fluid is anisotropic with symmetry $\text{SO}(D-1…
On actions for (entangling) surfaces and DCFTs
Jay Armas, Javier Tarrio
The dynamics of surfaces and interfaces describe many physical systems, including fluid membranes, entanglement entropy and the coupling of defects to quantum field theories. Based…
On the surface of superfluids
Jay Armas, Jyotirmoy Bhattacharya, Akash Jain +1
Developing on a recent work on localized bubbles of ordinary relativistic fluids, we study the comparatively richer leading order surface physics of relativistic superfluids, coupl…
Forced Fluid Dynamics from Blackfolds in General Supergravity Backgrounds
Jay Armas, Jakob Gath, Vasilis Niarchos +2
We present a general treatment of the leading order dynamics of the collective modes of charged dilatonic -brane solutions of (super)gravity theories in arbitrary backgrounds. T…
Gravitational Tension, Spacetime Pressure and Black Hole Volume
Jay Armas, Niels A. Obers, Marco Sanchioni
We study the first law of black hole thermodynamics in the presence of surrounding gravitational fields and argue that variations of these fields are naturally incorporated in the…
Surface transport in plasma-balls
Jay Armas, Jyotirmoy Bhattacharya, Nilay Kundu
We study the surface transport properties of stationary localized configurations of relativistic fluids to the first two non-trivial orders in a derivative expansion. By demanding…
New Geometries for Black Hole Horizons
Jay Armas, Matthias Blau
We construct several classes of worldvolume effective actions for black holes by integrating out spatial sections of the worldvolume geometry of asymptotically flat black branes. T…
Blackfolds, Plane Waves and Minimal Surfaces
Jay Armas, Matthias Blau
Minimal surfaces in Euclidean space provide examples of possible non-compact horizon geometries and topologies in asymptotically flat space-time. On the other hand, the existence o…
Uniqueness of Black Holes with Bubbles in Minimal Supergravity
Jay Armas
We generalise uniqueness theorems for non-extremal black holes with three mutually independent Killing vector fields in five-dimensional minimal supergravity in order to account fo…
Constraints on the effective fluid theory of stationary branes
Jay Armas, Troels Harmark
We develop further the effective fluid theory of stationary branes. This formalism applies to stationary blackfolds as well as to other equilibrium brane systems at finite temperat…
Black Probes of Schrödinger Spacetimes
Jay Armas, Matthias Blau
We consider black probes of Anti-de Sitter and Schrödinger spacetimes embedded in string theory and M-theory and construct perturbatively new black hole geometries. We begin by rev…
Black Holes and Biophysical (Mem)-branes
Jay Armas, Troels Harmark
We argue that the effective theory describing the long-wavelength dynamics of black branes is the same effective theory that describes the dynamics of biophysical membranes. We imp…
(Non)-Dissipative Hydrodynamics on Embedded Surfaces
Jay Armas
We construct the theory of dissipative hydrodynamics of uncharged fluids living on embedded space-time surfaces to first order in a derivative expansion in the case of codimension-…
Electroelasticity of Charged Black Branes
Jay Armas, Jakob Gath, Niels A. Obers
We present the first-order corrected dynamics of fluid branes carrying higher-form charge by obtaining the general form of their equations of motion to pole-dipole order. Assuming…
Null-Wave Giant Gravitons from Thermal Spinning Brane Probes
Jay Armas, Niels A. Obers, Andreas Vigand Pedersen
We construct and analyze thermal spinning giant gravitons in type II/M-theory based on spherically wrapped black branes, using the method of thermal probe branes originating from t…
How Fluids Bend: the Elastic Expansion for Higher-Dimensional Black Holes
Jay Armas
Hydrodynamics can be consistently formulated on surfaces of arbitrary co-dimension in a background space-time, providing the effective theory describing long-wavelength perturbatio…