426 citations · 3.4k across the 63 of their papers we have counts for
55 papers · 1 filter
An unusual BPS equation
Constantin Bachas, Lorenzo Bianchi, Zhongwu Chen
We prove a conjectured relation between the energy-momentum and the displacement norm of superconformal defects. The proof completes earlier results, and shows that supersymmetry i…
Invariant tensions from holography
Constantin Bachas, Zhongwu Chen
We revisit the problem of defining an invariant notion of tension in gravity. For spacetimes whose asymptotics are those of a Defect CFT we propose two independent definitions : Gr…
Energy Transport for Thick Holographic Branes
Constantin Bachas, Stefano Baiguera, Shira Chapman +2
Universal properties of two-dimensional conformal interfaces are encoded by the flux of energy transmitted and reflected during a scattering process. We develop an innovative metho…
Steady States of Holographic Interfaces
Constantin Bachas, Zhongwu Chen, Vassilis Papadopoulos
We find stationary thin-brane geometries that are dual to far-from-equilibrium steady states of two-dimensional holographic interfaces. The flow of heat at the boundary agrees with…
Phases of Holographic Interfaces
Constantin Bachas, Vassilis Papadopoulos
We compute the phase diagram of the simplest holographic bottom-up model of conformal interfaces. The model consists of a thin domain wall between three-dimensional Anti-de Sitter…
Energy Reflection and Transmission at 2D Holographic Interfaces
Constantin Bachas, Shira Chapman, Dongsheng Ge +1
Scattering from conformal interfaces in two dimensions is universal in that the flux of reflected and transmitted energy does not depend on the details of the initial state. In thi…
Massive AdS Supergravitons and Holography
Constantin Bachas
I compare two holographic mechanisms giving to the graviton a parametrically-small supersymmetric mass in Anti-de Sitter spacetime. In the context of bi-metric gravity these…
Marginal Deformations of 3d N=4 Linear Quiver Theories
Constantin Bachas, Ioannis Lavdas, Bruno Le Floch
We study superconformal deformations of the theories of Gaiotto-Hanany-Witten, paying special attention to mixed-branch operators with both electrically- and m…
Massive Anti-de Sitter Gravity from String Theory
Constantin Bachas, Ioannis Lavdas
We study top-down embeddings of massive Anti-de Sitter (AdS) gravity in type-IIB string theory. The supergravity solutions have a AdS fiber warped over a manifold M whose s…
Quantum Gates to other Universes
Constantin Bachas, Ioannis Lavdas
We present a microscopic model of a bridge connecting two large Anti-de-Sitter Universes. The Universes admit a holographic description as three-dimensional supersymme…
N=2 Moduli of AdS4 vacua: A fine-print study
Constantin Bachas, Massimo Bianchi, Amihay Hanany
We analyze the moduli spaces near N=4 supersymmetric AdS4 vacua of string theory by combining and comparing various approaches: (a) the known exact solutions of Type IIB string the…
Boundary Weyl anomaly of superconformal models
Constantin Bachas, Daniel Plencner
We calculate the trace and axial anomalies of superconformal theories with exactly marginal deformations, on a surface with boundary. Extending recent work by G…
Band Structure in Yang-Mills Theories
Constantin Bachas, Theodore Tomaras
We show how Yang-Mills theory on can exhibit a spectrum with continuous bands if coupled either to a topological 3-form gauge field, or to a dynamical axion with heav…
M-theory Solutions Invariant under
Constantin Bachas, Eric D'Hoker, John Estes +1
We simplify and extend the construction of half-BPS solutions to 11-dimensional supergravity, with isometry superalgebra D(2,1;γ) \oplus D(2,1;γ). Their space-time has the form AdS…
Calabi's diastasis as interface entropy
Constantin P. Bachas, Ilka Brunner, Michael R. Douglas +1
We show that the entropy of certain conformal interfaces between sigma models that belong to the same moduli space, has a natural geometric interpretation in the large vo…
Spin-2 spectrum of defect theories
Constantin Bachas, John Estes
We study spin-2 excitations in the background of the recently-discovered type-IIB solutions of D'Hoker et al. These are holographically-dual to defect conformal field theories, and…
Dynamics of Charged Events
C. Bachas, C. Bunster, M. Henneaux
In three spacetime dimensions the worldvolume of a magnetic source is a single point, an event. We make the event dynamical by regarding it as the imprint of a flux-carrying partic…
On the Symmetries of Classical String Theory
Constantin Bachas
I discuss some aspects of conformal defects and conformal interfaces in two spacetime dimensions. Special emphasis is placed on their role as spectrum-generating symmetries of clas…
Comments on Orientifolds without Vector Structure
Constantin Bachas, Massimo Bianchi, Ralph Blumenhagen +2
We revisit type I compactifications with a Spin(32)/Z2 gauge bundle that admits no vector structure. We elucidate the relation of this Z2 obstruction to discrete B-field flux and t…
Wetting and Minimal Surfaces
Constantin Bachas, Pierre Le Doussal, Kay Joerg Wiese
We study minimal surfaces which arise in wetting and capillarity phenomena. Using conformal coordinates, we reduce the problem to a set of coupled boundary equations for the contac…
Loop Operators and the Kondo Problem
Constantin Bachas, Matthias Gaberdiel
We analyse the renormalisation group flow for D-branes in WZW models from the point of view of the boundary states. To this end we consider loop operators that perturb the boundary…
World-sheet duality for D-branes with travelling waves
Constantin P. Bachas, Matthias R. Gaberdiel
We study D-branes with plane waves of arbitrary profiles as examples of time-dependent backgrounds in string theory. We show how to reproduce the quantum mechanical (one-to-one) op…
The scientific work of Sonia Stanciu
Constantin Bachas
The Leuven workshop on the `Quantum Structure of Space-time and the Geometrical Nature of the Fundamental Interactions' had a special session dedicated to the memory of Sonia Stanc…
Relativistic String in a Pulse
Constantin Bachas
I study a relativistic open string coupling through its endpoints to a plane wave with arbitrary temporal profile. The string's transverse oscillations respond linearly to the exte…