15 citations · 67 across the 16 of their papers we have counts for
12 papers · 1 filter
Quantum Response of a Harmonically Trapped Detector to Classical and Non-classical Gravitational Fields
Anom Trenggana, Freddy P. Zen, Seramika Ariwahjoedi
In this work, we study the response of a detector confined in a harmonic oscillator potential when interacting with classical and quantum gravitational fields. The detector respons…
Black-Body Radiation in a Uniformly Accelerated Frame
Seramika Ariwahjoedi, Apriadi Salim Adam, Hadyan Luthfan Prihadi +1
We derive Planck's radiation law in a uniformly accelerated frame expressed in Rindler coordinates. The black-body spectrum is time-dependent by its temperature and Planckian at ea…
Replica Trick Calculation for Entanglement Entropy of Static Black Hole Spacetimes
Hadyan Luthfan Prihadi, Freddy Permana Zen, Seramika Ariwahjoedi +1
We calculate the entanglement entropy between two (maximally-extended) spacetime regions of static black hole, seperated by horizon. As a first case, we consider the Schwarzschild…
(3+1)-Formulation for Gravity with Torsion and Non-Metricity II: The Hypermomentum Equation
Seramika Ariwahjoedi, Agus Suroso, F. P. Zen
In this article, we consider a special case of Metric-Affine f(R)-gravity for f(R) = R, i.e. the Metric-Affine General Relativity (MAGR). As a companion to the first article in the…
(3+1)-Formulation for Gravity with Torsion and Non-Metricity: The Stress-Energy-Momentum Equation
Seramika Ariwahjoedi, Agus Suroso, F. P. Zen
We derive the generalized Gauss-Codazzi-Mainardi (GCM) equation for a general affine connection with torsion and non-metricity. Moreover, we show that the metric compatibility and…
Hermiticity of the Volume Operators in Loop Quantum Gravity
S. Ariwahjoedi, I. Husin, I. Sebastian +1
The aim of this article is to provide a rigorous-but-simple steps to prove the hermiticity of the volume operator of Rovelli-Smolin and Ashtekar-Lewandowski using the angular momen…
Contracted Bianchi Identity and Angle Relation on n-dimensional Simplicial Complex of Regge Calculus
Seramika Ariwahjoedi, Freddy P. Zen
In this article, we prove the theorems concerning the trace relation of SO(3), SU(2), and SO(n) which are representation of SO(3) and SU(2). An interesting fact we found is the tra…
(2+1) Regge Calculus: Discrete Curvatures, Bianchi Identity, and Gauss-Codazzi Equation
Seramika Ariwahjoedi, Freddy P. Zen
The first results presented in our article are the clear definitions of both intrinsic and extrinsic discrete curvatures in terms of holonomy and plane-angle representation, a clea…
Statistical discrete geometry
Seramika Ariwahjoedi, Valerio Astuti, Jusak Sali Kosasih +2
Following our earlier work, we construct statistical discrete geometry by applying statistical mechanics to discrete (Regge) gravity. We propose a coarse-graining method for discre…
Degrees of freedom in discrete geometry
Seramika Ariwahjoedi, Jusak Sali Kosasih, Carlo Rovelli +1
Following recent developments in discrete gravity, we study geometrical variables (angles and forms) of simplices in the discrete geometry point of view. Some of our relatively new…
Curvatures and discrete Gauss-Codazzi equation in (2+1)-dimensional loop quantum gravity
Seramika Ariwahjoedi, Jusak Sali Kosasih, Carlo Rovelli +1
We derive the Gauss-Codazzi equation in the holonomy and plane-angle representations and we use the result to write a Gauss-Codazzi equation for a discrete (2+1)-dimensional manifo…
How many quanta are there in a quantum spacetime?
Seramika Ariwahjoedi, Jusak Sali Kosasih, Carlo Rovelli +1
Following earlier insights by Livine and Terno, we develop a technique for describing quantum states of the gravitational field in terms of coarse grained spin networks. We show th…