60 citations · 444 across the 35 of their papers we have counts for
35 papers
Superposition of dynamics, indefinite causal order, and quantum histories
Charis Anastopoulos, Ntina Savvidou
The process-matrix formalism describes quantum processes without assuming a fixed global causal order, but the physical meaning of indefinite causal order remains open. We address…
Quantum field theory measurements for relativistic particles
Nadia Koliopoulou, Charis Anastopoulos, Ntina Savvidou
The formulation of a consistent measurement theory for relativistic quantum fields has become a problem of growing foundational and practical significance. Standard non-relativisti…
Quantum Information in Relativity: the Challenge of QFT Measurements
Charis Anastopoulos, Ntina Savvidou
Proposed quantum experiments in deep space will be able to explore quantum information issues in regimes where relativistic effects are important. In this essay, we argue that a pr…
Classification theorem and properties of singular solutions to the Tolman-Oppenheimer-Volkoff equation
Charis Anastopoulos, Ntina Savvidou
The Tolman-Oppenheimer-Volkoff (TOV) equation admits singular solutions in addition to regular ones. Here, we prove the following theorem. For any equation of state that (i) is obt…
Multi-Time Measurements in Hawking Radiation: Information at Higher-Order Correlations
Charis Anastopoulos, Ntina Savvidou
It is believed that no information can be stored in Hawking radiation, because correlations between quanta of different field modes vanish. However, such correlations have been def…
Time of arrival and localization of relativistic particles
Charis Anastopoulos, Ntina Savvidou
Constructing observables that describe the localization of relativistic particles is an important foundational problem in relativistic quantum field theory (QFT). The description o…