3 papers
quant-ph2020
A comparison between quantum and classical noise radar sources
Robert Jonsson, Roberto Di Candia, Martin Ankel +2
We compare the performance of a quantum radar based on two-mode squeezed states with a classical radar system based on correlated thermal noise. With a constraint of equal number o…
quant-ph2020
Communication through quantum fields near a black hole
Robert H. Jonsson, David Q. Aruquipa, Marc Casals +2
We study the quantum channel between two localized first-quantized systems that communicate in 3+1 dimensional Schwarzschild spacetime via a quantum field. We analyze the informati…
quant-ph2019
Minimal energy cost of entanglement extraction
Lucas Hackl, Robert H. Jonsson
We compute the minimal energy cost for extracting entanglement from the ground state of a bosonic or fermionic quadratic system. Specifically, we find the minimal energy increase $…