Multipartite Entanglement in a Microwave Frequency Comb
Journal article, 2023
Significant progress has been made with multipartite entanglement of discrete qubits, but continuous variable systems may provide a more scalable path toward entanglement of large ensembles. We demonstrate multipartite entanglement in a microwave frequency comb generated by a Josephson parametric amplifier subject to a bichromatic pump. We find 64 correlated modes in the transmission line using a multifrequency digital signal processing platform. Full inseparability is verified in a subset of seven modes. Our method can be expanded to generate even more entangled modes in the near future.
Author
Shan W. Jolin
IQM Finland Oy
Royal Institute of Technology (KTH)
Gustav Andersson
Pritzker School of Molecular Engineering
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology
J. C.Rivera Hernández
Royal Institute of Technology (KTH)
Ingrid Strandberg
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology
Isaac Fernando Quijandria Diaz
Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics
Okinawa Institute of Science and Technology Graduate University
José Aumentado
National Institute of Standards and Technology (NIST)
Riccardo Borgani
Intermodulation Products AB
Royal Institute of Technology (KTH)
Mats O. Tholén
Royal Institute of Technology (KTH)
Intermodulation Products AB
D. Haviland
Royal Institute of Technology (KTH)
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 130 12 120601Wallenberg Centre for Quantum Technology (WACQT)
Knut and Alice Wallenberg Foundation (KAW 2017.0449, KAW2021.0009, KAW2022.0006), 2018-01-01 -- 2030-03-31.
Subject Categories (SSIF 2011)
Atom and Molecular Physics and Optics
Signal Processing
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1103/PhysRevLett.130.120601
PubMed
37027873