62 citations · 106 across the 9 of their papers we have counts for
9 papers
Time and causality in quantum gravity
Charis Anastopoulos
The problem of time in quantum gravity is often presented as a consequence of applying quantum theory to general relativity. These notes adopt a broader perspective. We first exami…
Singular Solutions of the Tolman Oppenheimer Volkoff Equation with a Cosmological Constant Classification and Properties
Christos Dounis, Charis Anastopoulos
We study the Tolman-Oppenheimer-Volkoff equation in the presence of a cosmological constant for general thermodynamically consistent equations of state, without imposing regularity…
Time of arrival on a ring and relativistic quantum clocks
Iason Vakondios, Charis Anastopoulos
We study the time-of-arrival problem for relativistic particles constrained to move on a ring, formulating the problem entirely within Quantum Field Theory (QFT). In contrast to it…
Including gravity in equilibrium thermodynamics
Eirini Sourtzinou, Charis Anastopoulos
This paper is part of a bottom-up approach to gravitational thermodynamics that is guided by the axiomatic frameworks of equilibrium thermodynamics. We identify a novel form of the…
Relativistic Quantum Information from Unequal-Time QFT Correlation Functions
Charis Anastopoulos, Konstantina Savvidou
This paper continues on the program of developing a relativistic quantum information theory in terms of unequal-time correlation functions in quantum field theory (QFT)[arXiv:2208.…
Towards a Field-Theory based Relativistic Quantum Information
Charis Anastopoulos, Bei-Lok Hu, Konstantina Savvidou
We present our program for the development of quantum informational concepts in relativistic systems in terms of the unequal-time correlation functions of quantum fields. We employ…
Quantum Field Theory based Quantum Information: Measurements and Correlations
Charis Anastopoulos, Bei-Lok Hu, Konstantina Savvidou
This is the first in a series of papers aiming to develop a relativistic quantum information theory in terms of unequal-time correlation functions in quantum field theory. In this…
The Deep Space Quantum Link: Prospective Fundamental Physics Experiments using Long-Baseline Quantum Optics
Makan Mohageg, Luca Mazzarella, Dmitry V. Strekalov +19
The National Aeronautics and Space Administration's Deep Space Quantum Link mission concept enables a unique set of science experiments by establishing robust quantum optical links…
Quantum Fields in Nonstatic background: A Histories Perspective
C. Anastopoulos
For a quantum field living on a non - static spacetime no instantaneous Hamiltonian is definable, for this generically necessitates a choice of inequivalent representation of the c…