A5024562044- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Particle physics theoretical and experimental studies
- Noncommutative and Quantum Gravity Theories
- Astrophysical Phenomena and Observations
- Nonlinear Waves and Solitons
- Quantum Chromodynamics and Particle Interactions
- Pulsars and Gravitational Waves Research
- Geophysics and Gravity Measurements
- Algebraic structures and combinatorial models
- Geometry and complex manifolds
- Advanced Mathematical Physics Problems
- Computational Physics and Python Applications
- Advanced X-ray Imaging Techniques
- Magnetic properties of thin films
- Superconducting Materials and Applications
- Power System Optimization and Stability
- Electromagnetic Simulation and Numerical Methods
- Quantum and electron transport phenomena
- Homotopy and Cohomology in Algebraic Topology
- Geophysics and Sensor Technology
- Quantum Electrodynamics and Casimir Effect
- Geometric Analysis and Curvature Flows
- High-pressure geophysics and materials
- Quantum, superfluid, helium dynamics
Johns Hopkins University
2015-2024
Nanjing University of Information Science and Technology
2022
University of California, San Diego
2017
University of Southern California
2014-2015
Institut de Physique Théorique
2013-2014
University of Michigan
2009-2013
CEA Paris-Saclay
2013
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2013
The grand challenges of contemporary fundamental physics---dark matter, dark energy, vacuum inflation and early universe cosmology, singularities the hierarchy problem---all involve gravity as a key component. And all gravitational phenomena, black holes stand out in their elegant simplicity, while harbouring some most remarkable predictions General Relativity: event horizons, ergoregions. hitherto invisible landscape Universe is being unveiled before our eyes: historical direct detection...
We propose a systematic approach to deriving symmetry generators of quantum field theories in holography. Central this analysis are the Gauss law constraints Hamiltonian quantization topological (SymTFTs), which obtained from supergravity. In turn, we realize world-volume D-branes Our main focus is on noninvertible symmetries, have emerged past year as new type d≥4 QFTs. exemplify our proposal holographic confinement setup, dual 4D N=1 Super-Yang Mills. brane picture, fusion symmetries...
A bstract We study the Symmetry Topological Field Theory in holography associated with 4d 𝒩 = 1 Super Yang-Mills theory gauge algebra 𝔰𝔲( M ). From this, all bulk symmetry operators are computed and matched to various D-brane configurations. The fusion of emerges from brane dynamics. In particular, we show that purely determined center-of-mass modes branes. identify TQFT coefficients relative motion also establish origin condensation defects, arising non-invertible operators, as consequence...
We provide the first example of a geometric transition that resolves Schwarzschild black hole into smooth microstructure in eleven-dimensional supergravity on seven-torus. The geometry is indistinguishable from dressed with scalar field four dimensions, referred to as scalarwall. In eleven arises moduli torus. resolution occurs at an infinitesimal scale above horizon, set by size internal torus, where it transitions bubbling spacetime supported M2-brane flux. Published American Physical Society 2024
In this letter we describe an infinite family of new $\mathcal{N}=1$ ${\mathrm{AdS}}_{5}/{\mathrm{CFT}}_{4}$ dual pairs which arise from M5-branes wrapping Riemann surfaces in Calabi-Yau threefolds. We use the relevant brane constructions to compute central charges infrared fixed points M5-brane anomaly polynomial. then present ${\mathrm{AdS}}_{5}\ifmmode\times\else\texttimes\fi{}{M}_{6}$ solutions 11-dimensional supergravity are these conformal field theories (CFTs) at large $N$. Finally,...
Compactifying $$ \mathcal{N}=\left(1,0\right) theories on a torus, with additional fluxes for global symmetries, we obtain \mathcal{N}=1 supersymmetric in four dimensions. It is shown that many choices of flux these models are toric quiver gauge singlet fields. In particular compare the anomalies deduced from description six-dimensional theory and theories. We also give predictions four-dimensional corresponding to general compactifications M5-branes probing...
A bstract We use the classical double copy to identify a necessary condition for Maxwell theory sources constitute single copies of Kerr-Schild solutions Einstein’s equations. In case four-dimensional spacetimes on Minkowski backgrounds, we extend this parameterization corresponding copies. These are given by Líenard-Wiechert fields charges complex worldlines. This unifies known instances black holes flat backgrounds into framework. Furthermore, more generic identified show why ring in five...
We initiate a study of the holographic duals class four-dimensional $\mathcal{N}=2$ superconformal field theories that are engineered by wrapping M5-branes on sphere with an irregular puncture. These notably include strongly-coupled Argyres-Douglas type. Our solutions obtained in 7d gauged supergravity, where they take form warped product $AdS_5$ and "half-spindle." The puncture is modeled localized M5-brane source internal space gravity duals. feature realization supersymmetry distinct from...
A bstract We consider the scattering of high energy and ultra relativistic spherically symmetric shells in asymptotically AdS D spacetimes. analyze an exclusive amplitude where a single shell goes one comes out, such that two have different global symmetry charges effective gravity theory. study simple wormhole configuration computes square its properties.
The authors study photon geodesics in the gravitational background generated by smooth horizonless topological solitons with same large distance behaviour as neutral non-rotating black holes. They show that incoming photons experience very high redshift, inducing phenomenological horizon-like behaviors from point of view scattering. Thus, they provide a compelling case for real-world and alternatives to
We study a class of four-dimensional $$ \mathcal{N}=1 superconformal field theories obtained by wrapping M5-branes on Riemann surface with punctures. identify fourdimensional UV descriptions the SCFTs corresponding to curves The quiver tails appearing in these differ significantly from their \mathcal{N}=2 counterpart. find new type object that we call 'Fan'. show how construct using Fan. Various dual for can be identified different colored pair-of-pants decompositions. For example, an analog...
A bstract We describe a systematic way of computing the ’t Hooft anomalies for continuous symmetries Quantum Field Theories in even dimensions that can be geometrically engineered from M5-branes. Our approach is based on anomaly inflow, and characterizes polynomial QFT terms geometric definition field theory. In particular, when admits holographic dual, topological data solution sufficient to compute dual theory, including finite N . study several classes examples four six dimensions, with...
We study smooth bubble spacetimes in five-dimensional Einstein-Maxwell theory that resemble four-dimensional magnetic black holes upon Kaluza-Klein reduction. denote them as topological stars since they have cycles supported by flux. They can be macroscopically large compared to the size of circle and could describe qualitative properties microstate geometries for astrophysical holes. also strings without curvature singularity, interior caps a two-dimensional Milne space with bubble.
We construct the first smooth bubbling geometries using Weyl formalism. The solutions are obtained from Einstein theory coupled to a two-form gauge field in six dimensions with two compact directions. classify charged this framework. Smooth consist of chain Kaluza-Klein bubbles that can be neutral or wrapped by electromagnetic fluxes, and free curvature conical singularities. discuss how such topological structures prevented gravitational collapse without struts. When embedded type IIB,...
A bstract We construct the first class of topological solitons in gravity that are supported by internal electromagnetic flux with vanishing net charges. The solutions obtained a six-dimensional Einstein-Maxwell theory three-form flux, and admit an uplift to type IIB supergravity on T 4 . They asymptotic torus fibration over four-dimensional Minkowski spacetime. An interesting corresponds BPS particle its anti-BPS partner held apart vacuum bubble. In IIB, they correspond bound states D1-D5...
We study scalar perturbations of topological solitons, smooth horizonless solutions in five-dimensional Einstein-Maxwell theory that correspond to coherent states gravity via the dynamics extra compact dimensions. First, we compute quasinormal modes for stars have a single unstable photon sphere, and show spectrum is very similar black hole with same sphere. Next, both stable inner sphere an one. The first few are localized around also contains ''black-hole like modes'' at outer frequencies...
A bstract We construct large classes of non-BPS smooth horizonless geometries that are asymptotic to AdS 3 × S T 4 in type IIB supergravity. These supported by electromagnetic flux corresponding D1-D5 charges. show Einstein equations for systems with eight commuting Killing vectors decompose into a set Ernst equations, thereby admitting an integrable structure. This feature, which can priori be applied other $$ {\textrm{AdS}}_D\times \mathcal{C} <mml:math...
We derive the anomaly polynomials of 4d $\mathcal{N}=2$ theories that are obtained by wrapping M5-branes on a Riemann surface with arbitrary regular punctures, using inflow in corresponding M-theory setup. Our results match known for class $\mathcal{S}$ SCFTs. In our approach, contributions to 't Hooft anomalies due boundary conditions at punctures determined entirely $G_4$-flux 11d geometry. This computation provides top-down derivation these utilizes geometric definition field theories,...
We construct smooth static bubble solutions, denoted as topological stars, in five-dimensional Einstein-Maxwell theories which are asymptotic to $\mathbb{R}^{1,3}\times$S$^1$. The bubbles supported by allowing electromagnetic fluxes wrap cycles. solutions live the same regime non-extremal charged black strings, that reduce holes four dimensions. generalize multi-body configurations on a line constructing closed-form generalized Weyl theory. Generic consist of stars and strings stacked line,...
We analyze the global symmetries and anomalies of 4d $\mathcal{N} = 1$ field theories that arise from a stack $N$ M5-branes probing class flux backgrounds. These backgrounds consist resolved $\mathbb{C}^2 / \mathbb{Z}_k$ singularity fibered over smooth Riemann surface genus $g \geq 2$, supported by non-trivial $G_4$-flux configuration labeled collection $2(k-1)$ quanta, $\{N_i\}$. For $k=2$, this setup defines superconformal theory (SCFT) in IR, which is holographically dual to an explicit...
A bstract We find AdS 5 solutions holographically dual to compactifications of six- dimensional $$ \mathcal{N} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>N</mml:mi> </mml:math> = (1, 0) supersymmetric field theories on Riemann surfaces with punctures. simplify a previous analysis IIA solutions, and suitable Ansatz we explicit organized in three classes, where an O8-D8 stack, D6-and D4-branes are simultaneously present, localized partially localized. The smeared over...