Experimental quantum communication enhancement by superposing trajectories

Rubino，Giulia1; Rozema，Lee A.1; Ebler，Daniel2,3,4; Kristjánsson，Hlér5,6; Salek，Sina7; Allard Guérin，Philippe1,8; Abbott，Alastair A.9; Branciard，Cyril10; Brukner，Časlav1,8; Chiribella，Giulio4,5,6,11; Walther，Philip1,12

2021-01-29

10.1103/PhysRevResearch.3.013093

Physical Review Research   影响因子和分区

2643-1564

In quantum communication networks, wires represent well-defined trajectories along which quantum systems are transmitted. In spite of this, trajectories can be used as a quantum control to govern the order of different noisy communication channels, and such a control has been shown to enable the transmission of information even when quantum communication protocols through well-defined trajectories fail. This result has motivated further investigations on the role of the superposition of trajectories in enhancing communication, which revealed that the use of quantum control of parallel communication channels, or of channels in series with quantum-controlled operations, can also lead to communication advantages. Building upon these findings, here we experimentally and numerically compare different ways in which two trajectories through a pair of noisy channels can be superposed. We observe that, within the framework of quantum interferometry, the use of channels in series with quantum-controlled operations generally yields the largest advantages. Our results contribute to clarify the nature of these advantages in experimental quantum-optical scenarios, and showcase the benefit of an extension of the quantum communication paradigm in which both the information exchanged and the trajectory of the information carriers are quantum.

EI ; ESCI

英语

其他

WOS:000613149500003

20210709916899

Communication channels (information theory) ; Control theory ; Optical communication ; Quantum theory ; Trajectories

Telecommunication; Radar, Radio and Television:716 ; Information Theory and Signal Processing:716.1 ; Optical Communication Systems:717.1 ; Control Systems:731.1 ; Quantum Theory; Quantum Mechanics:931.4

2-s2.0-85102227099

Scopus

1.Vienna Center for Quantum Science and Technology (VCQ),Faculty of Physics,University of Vienna,Vienna,Boltzmanngasse 5,1090,Austria
2.Institute for Quantum Science and Engineering,Department of Physics,Southern University of Science and Technology (SUSTech),Shenzhen,1088 Xueyuan Avenue,518055,China
3.Wolfson College,University of Oxford,Oxford,Linton Road,OX2 6UD,United Kingdom
4.QICI Quantum Information and Computation Initiative,Department of Computer Science,University of Hong Kong,Hong Kong,Pok Fu Lam Road,999077,Hong Kong
5.Quantum Group,Department of Computer Science,University of Oxford,Wolfson Building,Oxford,Parks Road,OX1 3QD,United Kingdom
6.HKU-Oxford Joint Laboratory for Quantum Information and Computation,University of Hong Kong,Hong Kong,Pok Fu Lam Road,999077,Hong Kong
7.Fujitsu Laboratories of Europe,Hayes, Middlesex,Hyde Park Hayes, 11 Millington Road,UB3 4AZ,United Kingdom
8.Institute for Quantum Optics and Quantum Information (IQOQI),Austrian Academy of Sciences,Vienna,Boltzmanngasse 3,1090,Austria
9.Department of Applied Physics,University of Geneva,Geneva,1211,Switzerland
10.Université Grenoble Alpes,CNRS,Grenoble INP,Institut Nel,Grenoble,38000,France
11.Perimeter Institute for Theoretical Physics,Waterloo,31 Caroline Street North,N2L 2Y5,Canada
12.Research Platform TURIS,University of Vienna,Vienna,Boltzmanngasse 5,1090,Austria

Rubino，Giulia,Rozema，Lee A.,Ebler，Daniel,et al. Experimental quantum communication enhancement by superposing trajectories[J]. Physical Review Research,2021,3(1).

Rubino，Giulia.,Rozema，Lee A..,Ebler，Daniel.,Kristjánsson，Hlér.,Salek，Sina.,...&Walther，Philip.(2021).Experimental quantum communication enhancement by superposing trajectories.Physical Review Research,3(1).

Rubino，Giulia,et al."Experimental quantum communication enhancement by superposing trajectories".Physical Review Research 3.1(2021).