75 citations · 266 across the 7 of their papers we have counts for
7 papers
Quantum Estimation of Parameters of Classical Spacetimes
T. G. Downes, J. R. van Meter, E. Knill +2
We describe a quantum limit to measurement of classical spacetimes. Specifically, we formulate a quantum Cramer-Rao lower bound for estimating the single parameter in any one-param…
Quantum Communication with an Accelerated Partner
T. G. Downes, T. C. Ralph, N. Walk
An unsolved problem in relativistic quantum information research is how to model efficient, directional quantum communication between localised parties in a fully quantum field the…
Relativistic quantum information and time machines
Timothy C. Ralph, Tony G. Downes
Relativistic quantum information combines the informational approach to understanding and using quantum mechanics systems - quantum information - with the relativistic view of the…
Optimal Quantum Estimation for Gravitation
T. G. Downes, G. J. Milburn, C. M. Caves
Here we describe the quantum limit to measurement of the classical gravitational field. Specifically, we write down the optimal quantum Cramer-Rao lower bound, for any single param…
Entangling moving cavities in non-inertial frames
T. G. Downes, I. Fuentes, T. C. Ralph
An open question in the field of relativistic quantum information is how parties in arbitrary motion may distribute and store quantum entanglement. We propose a scheme for storing…
Quantum Connectivity of Space-Time and Gravitationally Induced Decorrelation of Entanglement
T. C. Ralph, G. J. Milburn, T. Downes
We discuss an alternative formulation of the problem of quantum optical fields in a curved space-time using localized operators. We contrast the new formulation with the standard a…