Integrated conversion and photodetection of virtual photons in an ultrastrongly coupled superconducting quantum circuit
Loading...
Access rights
openAccess
CC BY
CC BY
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Date
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
European Physical Journal: Special Topics, Volume 232, pp. 3387–3392
Abstract
The ground state of an artificial atom ultrastrongly coupled to quantized modes is entangled and contains an arbitrary number of virtual photons. The problem of their detection has been raised since the very birth of the field, but despite the theoretical efforts still awaits experimental demonstration. Recently, experimental problems have been addressed in detail showing that they can be overcome by combining an unconventional design of the artificial atom with advanced coherent control. In this work, we study a simple scheme of control-integrated continuous measurement, which makes remarkably favorable the tradeoff between measurement efficiency and backaction showing that the unambiguous detection of virtual photons can be achieved within state-of-the-art quantum technologies.Description
Funding Information: We acknowledge J. Rajendran and A. Ridolfo who helped to develop our insight for this paper. This work was supported by the QuantERA grant SiUCs (Grant No. 731473), by the PNRR MUR project PE0000023-NQSTI, by ICSC–Centro Nazionale di Ricerca in High-Performance Computing, Big Data and Quantum Computing, by the University of Catania, Piano Incentivi Ricerca di Ateneo 2020-22, project Q-ICT. EP acknowledges the COST Action CA 21144 superqumap and GSP acknowledges financial support from the Academy of Finland under the Finnish Center of Excellence in Quantum Technology QTF (projects 312296, 336810, 352927,352925). Publisher Copyright: © 2023, The Author(s).
Keywords
Other note
Citation
Giannelli, L, Anfuso, G, Grajcar, M, Paraoanu, G S, Paladino, E & Falci, G 2023, 'Integrated conversion and photodetection of virtual photons in an ultrastrongly coupled superconducting quantum circuit', European Physical Journal: Special Topics, vol. 232, pp. 3387–3392. https://doi.org/10.1140/epjs/s11734-023-00989-0