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

Royal Institute of Technology (KTH)

IQM Finland Oy

Gustav Andersson

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology

Pritzker School of Molecular Engineering

J. C.Rivera Hernández

Royal Institute of Technology (KTH)

Ingrid Strandberg

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology

Isaac Fernando Quijandria Diaz

Okinawa Institute of Science and Technology Graduate University

Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics

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 120601

Subject Categories

Atom and Molecular Physics and Optics

Signal Processing

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1103/PhysRevLett.130.120601

PubMed

37027873

More information

Latest update

4/12/2023