9.3k citations · 32.4k across the 146 of their papers we have counts for
137 papers · 1 filter
Non-local non-linear sigma models
Steven S. Gubser, Christian B. Jepsen, Ziming Ji +2
We study non-local non-linear sigma models in arbitrary dimension, focusing on the scale invariant limit in which the scalar fields naturally have scaling dimension zero, so that t…
Mixed field theory
Steven S. Gubser, Christian Jepsen, Ziming Ji +1
We consider scalar field theory defined over a direct product of the real and -adic numbers. An adjustable dynamical scaling exponent enters into the microscopic lagrangian,…
Spin in -adic AdS/CFT
Steven S. Gubser, Christian Jepsen, Brian Trundy
We study the holographic dual of the simplest notion of spin in a -adic field theory, namely Green's functions which involve non-trivial sign characters over the -adic number…
Higher melonic theories
Steven S. Gubser, Christian Jepsen, Ziming Ji +1
We classify a large set of melonic theories with arbitrary -fold interactions, demonstrating that the interaction vertices exhibit a range of symmetries, always of the form $\ma…
Continuum limits of sparse coupling patterns
Steven S. Gubser, Christian Jepsen, Ziming Ji +1
We exhibit simple lattice systems, motivated by recently proposed cold atom experiments, whose continuum limits interpolate between real and -adic smoothness as a spectral expon…
Signs of the time: Melonic theories over diverse number systems
Steven S. Gubser, Matthew Heydeman, Christian Jepsen +4
Melonic field theories are defined over the -adic numbers with the help of a sign character. Our construction works over the reals as well as the -adics, and it includes the…
Geodesic bulk diagrams on the Bruhat-Tits tree
Steven S. Gubser, Sarthak Parikh
Geodesic bulk diagrams were recently shown to be the geometric objects which compute global conformal blocks. We show that this duality continues to hold in -adic AdS/CFT, where…
A -adic version of AdS/CFT
Steven S. Gubser
In this summary of my talk at Strings 2016, I explain how classical dynamics on an infinite tree graph can be dual to a conformal field theory defined over the -adic numbers. An…
O(N) and O(N) and O(N)
Steven S. Gubser, Christian Jepsen, Sarthak Parikh +1
Three related analyses of theory with symmetry are presented. In the first, we review the model over the -adic numbers and the discrete renormalization group…
Edge length dynamics on graphs with applications to -adic AdS/CFT
Steven S. Gubser, Matthew Heydeman, Christian Jepsen +5
We formulate a Euclidean theory of edge length dynamics based on a notion of Ricci curvature on graphs with variable edge lengths. In order to write an explicit form for the discre…
Gapped Fermions in Top-down Holographic Superconductors
Oliver DeWolfe, Steven S. Gubser, Oscar Henriksson +1
We use holography to compute spectral functions of certain fermionic operators in three different finite-density, zero-temperature states of ABJM theory with a broken U(1) symmetry…
Segmented strings and the McMillan map
Steven S. Gubser, Sarthak Parikh, Przemek Witaszczyk
We present new exact solutions describing motions of closed segmented strings in in terms of elliptic functions. The existence of analytic expressions is due to the integra…
Evolution of segmented strings
Steven S. Gubser
I explain how to evolve segmented strings in de Sitter and anti-de Sitter spaces of any dimension in terms of forward-directed null displacements. The evolution is described entire…
Perturbations of vortex ring pairs
Steven S. Gubser, Bart Horn, Sarthak Parikh
We study pairs of co-axial vortex rings starting from the action for a classical bosonic string in a three-form background. We complete earlier work on the phase diagram of classic…
Nonlinear Sigma Models with Compact Hyperbolic Target Spaces
Steven Gubser, Zain H. Saleem, Samuel S. Schoenholz +2
We explore the phase structure of nonlinear sigma models with target spaces corresponding to compact quotients of hyperbolic space, focusing on the case of a hyperbolic genus-2 Rie…
Fermionic Response in Finite-Density ABJM Theory with Broken Symmetry
Oliver DeWolfe, Steven S. Gubser, Oscar Henriksson +1
We calculate fermionic response in domain wall backgrounds of four-dimensional gauged supergravity interpolating between distinct stable AdS vacua. The backgrounds, found by Bobev…
Segmented Strings in
Nele Callebaut, Steven S. Gubser, Andreas Samberg +1
We study segmented strings in flat space and in . In flat space, these well known classical motions describe strings which at any instant of time are piecewise linear. In $A…
Holographic Fermi surfaces at finite temperature in top-down constructions
Charles Cosnier-Horeau, Steven S. Gubser
We calculate the two-point Green's functions of operators dual to fermions of maximal gauged supergravity in four and five dimensions, in finite temperature backgrounds with finite…
Complexified boost invariance and holographic heavy ion collisions
Steven S. Gubser, Wilke van der Schee
At strong coupling holographic studies have shown that heavy ion collisions do not obey normal boost invariance. Here we study a modified boost invariance through a complex shift i…
Strings and vortex rings
Steven S. Gubser, Revant Nayar, Sarthak Parikh
We treat string propagation and interaction in the presence of a background Neveu-Schwarz three-form field strength, suitable for describing vortex rings in a superfluid or low-vis…
An axial gauge ansatz for higher spin theories
Steven S. Gubser, Wei Song
We present an ansatz which makes the equations of motion more tractable for the simplest of Vasiliev's four-dimensional higher spin theories. The ansatz is similar to axial gauge i…
Minding the Gap in N=4 Super-Yang-Mills
Oliver DeWolfe, Steven S. Gubser, Christopher Rosen
We analyze fermionic response in the geometry holographically dual to zero-temperature N=4 Super-Yang-Mills theory with two equal nonvanishing chemical potentials, which is charact…
Finite momentum at string endpoints
Andrej Ficnar, Steven S. Gubser
We argue that classical strings, both bosonic and supersymmetric, can have finite energy and momentum at their endpoints. We show that in a general curved background, string endpoi…
Heavy ions and string theory
Oliver DeWolfe, Steven S. Gubser, Christopher Rosen +1
We review a selection of recent developments in the application of ideas of string theory to heavy ion physics. Our topics divide naturally into equilibrium and non-equilibrium phe…