Multimode cOrrelations in microwave photonics with Superconducting quAntum Circuits

Projektinformationen

MOSAiC

ID Finanzhilfevereinbarung: 835791

DOI

10.3030/835791

Projekt abgeschlossen

EK-Unterschriftsdatum 9 April 2019

Startdatum 1 Oktober 2019

Enddatum 30 September 2021

Finanziert unter

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Gesamtkosten

€ 184 707,84

EU-Beitrag

€ 184 707,84

Koordiniert durch

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
France

Periodic Reporting for period 1 - MOSAiC (Multimode cOrrelations in microwave photonics with Superconducting quAntum Circuits)

Berichtszeitraum: 2019-10-01 bis 2021-09-30

Zusammenfassung vom Kontext und den Gesamtzielen des Projekts

Photonic multimode continuous variable (CV) quantum states have been experimentally demonstrated at optical frequencies, but they are still not established in the microwave regime.
“Mosaic” addresses this challenge, aiming at demonstrating multimode entangled quantum states with Josephson meta-materials.

Quantum states of light consisting of many entangled modes (multimode entangled states) provide a powerful quantum resource and have been recently proposed as a platform for universal quantum computing.
The aim of this project is to generate broadband multimode entangled states for the first time in the microwave regime.
Superconducting quantum circuits, specifically, Josephson meta-materials, are used to generate and control quantum correlations between different frequency modes in microwave photons.

The experimental proof that Josephson-metamaterial can be successfully used as sources of itinerant quantum states of microwave radiation represents a decisive step forward for the exploration of novel microwave photonics experiments for quantum technology applications.

Arbeit, die ab Beginn des Projekts bis zum Ende des durch den Bericht erfassten Berichtszeitraums geleistet wurde, und die wichtigsten bis dahin erzielten Ergebnisse

The first key achievement of Mosaic is the development of a novel superconducting device, a traveling wave parametric amplifier (TWPA) whose unit cell is a SNAIL (superconducting nonlinear asymmetric inductive element) circuit. It has been proved that such a device can be used to achieve near-quantum-limited parametric amplification with a novel phase matching mechanism (Reversed Kerr Phase matching) and with bandwidth performance that improved the state of the art.

The second key achievement is the first demonstration of two-mode squeezing generation in a travelling wave parametric amplifier. The novel Reversed Kerr TWPA, developed in the first part of the project, has been successfully used as a source of multimode entanglement. This experimental result is the main milestone of the whole project.

Fortschritte, die über den aktuellen Stand der Technik hinausgehen und voraussichtliche potenzielle Auswirkungen (einschließlich der bis dato erzielten sozioökonomischen Auswirkungen und weiter gefassten gesellschaftlichen Auswirkungen des Projekts)

Within this project, two-mode-squeezing and broadband entanglement generation in a TWPA device has been experimentally demonstrated for the first time.
Such a key achievement opens an interesting avenue to the use of TWPA devices as a playground for microwave photonics experiments.

Sketch of multimode entanglement generation with a Josephson meta-material