37 citations · 225 across the 12 of their papers we have counts for
12 papers
Bilocal geodesic operators in static spherically-symmetric spacetimes
Julius Serbenta, Mikołaj Korzyński
We present a method to compute exact expressions for optical observables for static spherically symmetric spacetimes in the framework of the bilocal geodesic operator formalism. Th…
Testing the null energy condition with precise distance measurements
Mikołaj Korzyński, Julius Serbenta
We present an inequality between two types of distance measures to a single source in general relativity. It states that for a given emitter and observer the distance between them…
Isolating non-linearities of light propagation in inhomogeneous cosmologies
Michele Grasso, Eleonora Villa, Mikołaj Korzyński +1
A new formulation for light propagation in geometric optics by means of the Bi-local Geodesic Operators is considered. We develop the BiGONLight Mathematica package, uniquely desig…
Weighing the spacetime along the line of sight using times of arrival of electromagnetic signals
Mikołaj Korzyński, Jan Miśkiewicz, Julius Serbenta
We present a new method of measuring the mass density along the line of sight, based on precise measurements of the variations of the times of arrival (TOA's) of electromagnetic si…
Geometric optics in relativistic cosmology: new formulation and a new observable
Mikołaj Korzyński, Eleonora Villa
We discuss a new formalism for light propagation which can be used within the regime of validity of geometric optics, but with no limitation on the scales of interest: from inside…
Variational principle for the Einstein-Vlasov equations
Lars Andersson, Mikołaj Korzyński
The Einstein-Vlasov equations govern Einstein spacetimes filled with matter which interacts only via gravitation. The matter, described by a distribution function on phase space, e…
Geometric optics in general relativity using bilocal operators
Michele Grasso, Mikołaj Korzyński, Julius Serbenta
We consider the standard problem of observational astronomy, i.e. the observations of light emission from a distant region of spacetime in general relativity. The goal is to descri…
Black-Hole Lattices as Cosmological Models
Eloisa Bentivegna, Timothy Clifton, Jessie Durk +2
The search for solutions of Einstein's equations representing relativistic cosmological models with a discrete matter content has been remarkably fruitful in the last decade. In th…
Inhomogeneous cosmology and backreaction: Current status and future prospects
Krzysztof Bolejko, Mikołaj Korzyński
Astronomical observations reveal hierarchical structures in the Universe, from galaxies, groups of galaxies, clusters and superclusters, to filaments and voids. On the largest scal…
Light propagation through black-hole lattices
Eloisa Bentivegna, Mikołaj Korzyński, Ian Hinder +1
The apparent properties of distant objects encode information about the way the light they emit propagates to an observer, and therefore about the curvature of the underlying space…
On the vacuum Einstein equations along curves with a discrete local rotational and reflection symmetry
Mikołaj Korzyński, Ian Hinder, Eloisa Bentivegna
We discuss the possibility of a dimensional reduction of the Einstein equations in S3 black-hole lattices. It was reported in previous literature that the evolution of spaces conta…
Backreaction and continuum limit in a closed universe filled with black holes
Mikołaj Korzyński
We discuss the continuum limit of the initial data for a vacuum, closed cosmological model with black holes as the only sources of the gravitational field. The model we consider is…