36 citations · 95 across the 18 of their papers we have counts for
18 papers
3D Einstein action from 6D Kodaira-Spencer gravity
Johanna Erdmenger, Jonathan Karl, Jani Kastikainen +1
In view of embedding 3D gravity into topological string theory, we show that the dimensional reduction of 6D Kodaira-Spencer gravity on , i.e. the low-energ…
Covariant unification of holographic c-functions
Niko Jokela, Jani Kastikainen, Carlos Nunez +2
We propose a covariant holographic c-function, defined directly in a top-down background and constructed from the extrinsic curvature of codimension-two slices of the bulk geometry…
Topological Einstein gravity as Kodaira-Spencer gravity
Johanna Erdmenger, Jonathan Karl, Jani Kastikainen +2
As a contribution towards quantizing three-dimensional gravity, we show at the classical level that Euclidean three-dimensional Einstein gravity with a negative cosmological consta…
Entanglement C-functions of defects and interfaces in supersymmetric Yang-Mills theory
Niko Jokela, Jani Kastikainen, José Manuel Penín +2
We consider planar codimension-one defects and interfaces in supersymmetric Yang-Mills (SYM) theory, realized by the D3/D5-brane intersection. Working in the probe…
Driven inhomogeneous CFT as a theory in curved space-time
Johanna Erdmenger, Jani Kastikainen, Tim Schuhmann
For two-dimensional conformal field theories driven by evolving background space-time metrics in a closed universe, we present an operator formulation as a driven inhomogeneous CFT…
On entanglement c-functions in confining gauge field theories
Niko Jokela, Jani Kastikainen, Carlos Nunez +3
Entanglement entropy has proven to be a powerful tool for probing renormalization group (RG) flows in quantum field theories, with c-functions derived from it serving as candidate…
Holographic confining theories on space-times with constant positive curvature
Jani Kastikainen, Elias Kiritsis, Francesco Nitti
Varying the curvature, quantum phase transitions are investigated in holographic confining QFTs defined on a fixed constant positive curvature background. We find a competition bet…
Towards complexity of primary-deformed Virasoro circuits
Johanna Erdmenger, Jani Kastikainen, Tim Schuhmann
The Fubini-Study metric is a central element of information geometry. We explore the role played by information geometry for determining the circuit complexity of Virasoro circuits…
Flavors of entanglement
Niko Jokela, Jani Kastikainen, José Manuel Penín +1
We employ holography to investigate Liu-Mezei renormalization group monotones in conformal field theories influenced by massive flavor degrees of freedom. We examine the entangleme…
Cornering gravitational entropy
Jani Kastikainen, Andrew Svesko
We present a new derivation of gravitational entropy functionals in higher-curvature theories of gravity using corner terms that are needed to ensure well-posedness of the variatio…
Gravitational Rényi entropy from corner terms
Jani Kastikainen, Andrew Svesko
We provide a consistent first principles prescription to compute gravitational Rényi entropy using Hayward corner terms. For Euclidean solutions to Einstein gravity, we compute Rén…
Quantum information geometry of driven CFTs
Jan de Boer, Victor Godet, Jani Kastikainen +1
Driven quantum systems exhibit a large variety of interesting and sometimes exotic phenomena. Of particular interest are driven conformal field theories (CFTs) which describe quant…
Holographic BCFT Spectra from Brane Mergers
Shovon Biswas, Jani Kastikainen, Sanjit Shashi +1
We use holography to study the spectra of boundary conformal field theories (BCFTs). To do so, we consider a 2-dimensional Euclidean BCFT with two circular boundaries that correspo…
Flavored ABJM theory on the sphere and holographic F-functions
Niko Jokela, Jani Kastikainen, Elias Kiritsis +1
We study strongly coupled ABJM theory on the 3-sphere with massive quenched flavor using the AdS/CFT correspondence. The holographic dual consists of type IIA supergravity with pro…
Structure of Holographic BCFT Correlators from Geodesics
Jani Kastikainen, Sanjit Shashi
We compute correlation functions, specifically 1-point and 2-point functions, in holographic boundary conformal field theory (BCFT) using geodesic approximation. The holographic mo…
Quantum hypothesis testing in many-body systems
Jan de Boer, Victor Godet, Jani Kastikainen +1
One of the key tasks in physics is to perform measurements in order to determine the state of a system. Often, measurements are aimed at determining the values of physical paramete…
Conical defects and holography in topological AdS gravity
Jani Kastikainen
We study codimension-even conical defects that contain a deficit solid angle around each point along the defect. We show that they lead to a delta function contribution to the Love…
Quasi-local energy and ADM mass in pure Lovelock gravity
Jani Kastikainen
We study how the standard definitions of ADM mass and Brown-York quasi-local energy generalize to pure Lovelock gravity. The quasi-local energy is renormalized using the background…