105 citations · 256 across the 16 of their papers we have counts for
17 papers
The stress-energy distributional multipole for both uncharged and charged dust
Jonathan Gratus, Spyridon Talaganis, Willow Sparks
In this paper, we formulate the distributional uncharged and charged stress-energy tensors. These are integrals, along a worldline, of derivatives of the delta-function. These dist…
Qiskit Quantum Circuits Posit Singlet state in Radical Pair-based Magnetoreception of Migratory Birds
Hillol Biswas, Spyridon Talaganis
Quantum computing applications in diverse domains are emerging rapidly. Given the limitations of classical computing techniques, the peculiarity of quantum circuits, which can obse…
The tensorial representation of the distributional stress-energy quadrupole and its dynamics
Jonathan Gratus, Spyridon Talaganis
We investigate stress-energy tensors constructed from the covariant derivatives of delta functions on a worldline. Since covariant derivatives are used all the components transform…
The Distributional Stress-Energy Quadrupole
Jonathan Gratus, Paolo Pinto, Spyridon Talaganis
We investigate stress-energy tensors constructed from the delta function on a worldline. We concentrate on quadrupoles as they make an excellent model for the dominant source of gr…
Unitarity in Infinite Derivative Theories
Spyridon Talaganis
In this paper, we consider an infinite derivative scalar field action with infinite derivative kinetic and interaction terms. We establish that the theory is unitary if the correla…
Slavnov Identities for Infinite Derivative Theory of Gravity
Spyridon Talaganis
In this paper, we shall consider an infinite-derivative theory of gravity, with a view to making it renormalisable. First, we derive the modified superficial degree of divergence.…
Scale of non-locality for a system of particles
Spyridon Talaganis, Ali Teimouri
Higher derivative theories of gravity are associated with a mass scale to insure the correct dimensionality of the covariant derivatives. This mass scale is known as the scale of n…
Towards UV Finiteness of Infinite Derivative Theories of Gravity and Field Theories
Spyridon Talaganis
In this paper we will consider the ultraviolet (UV) finiteness of the most general one-particle irreducible (PI) Feynman diagrams within the context of ghost-free, infinite-deri…
Rotating black hole and entropy for modified theories of gravity
Spyridon Talaganis, Ali Teimouri
In this paper we obtain the entropy of the Kerr black hole for a number of modified theories of gravity. We show that as long as the deviation from Einstein Hilbert term consists p…
Hamiltonian Analysis for Infinite Derivative Field Theories and Gravity
Spyridon Talaganis, Ali Teimouri
Typically higher-derivative theories are unstable. Instabilities manifest themselves from extra propagating degrees of freedom, which are unphysical. In this paper, we will investi…
Generalised Boundary Terms for Higher Derivative Theories of Gravity
Ali Teimouri, Spyridon Talaganis, James Edholm +1
In this paper we wish to find the corresponding Gibbons-Hawking-York term for the most general quadratic in curvature gravity by using Coframe slicing within the Arnowitt-Deser-Mis…
High-Energy Scatterings in Infinite-Derivative Field Theory and Ghost-Free Gravity
Spyridon Talaganis, Anupam Mazumdar
In this paper, we will consider scattering diagrams in the context of infinite-derivative theories. First, we examine a finite-order higher-derivative scalar field theory and find…
Projecting the graviton to probe higher or lower dimensions
Anupam Mazumdar, Spyridon Talaganis
In this paper, we will discuss how in Einstein's theory a graviton can be enforced to probe fewer space-time dimensions in the deep ultraviolet (UV) as compared to far infrared (IR…
Non-local gravity in D-dimensions: Propagator, entropy and bouncing Cosmology
Aindriu Conroy, Anupam Mazumdar, Spyridon Talaganis +1
We present the graviton propagator for an infinite derivative, -dimensional, non-local action, up to quadratic order in curvature around a Minkowski background, and discuss the…
Quantum Loops in Non-Local Gravity
Spyridon Talaganis
In this proceedings, I will consider quantum aspects of a non-local, infinite-derivative scalar field theory - a depiction of a covariant infinite-derivative,…
String-Inspired Infinite-Derivative Theories of Gravity: A Brief Overview
Tirthabir Biswas, Spyridon Talaganis
In String Theory there often appears a rather interesting class of higher derivative theories containing an infinite set of derivatives in the form of an exponential. These theorie…
Towards understanding the ultraviolet behavior of quantum loops in infinite-derivative theories of gravity
Spyridon Talaganis, Tirthabir Biswas, Anupam Mazumdar
In this paper we will consider quantum aspects of a non-local, infinite-derivative scalar field theory - a depiction of a covariant infinite-derivative, non-loca…