QuantERA Call 2019 - 2ème Appel de l'ERA-NET Cofund QuantERA

Photon-Atom Cooperative Effects at Interfaces – PACE-IN

Pace-In

The overall objective of this proposal is to meet the critical challenge of studying, implementing and optimizing ground-breaking, dynamically-controlled interfaces between matter and light.

Two experiments from our group are involved in PACE-IN, named “Rb1” and “Rb2”.

Rb1 is devoted to the development of new method to generate and characterize nonclassical light using large ensemble of cold atoms. Experiments are currently on-going on the measurement on light fluctuation statistics after scattering and crossing a cold-atom sample, and preliminary data are encouraging.<br />Rb2 is devoted to the characterization and understanding of cooperative scattering phenomena such as superradiance and subradiance. After first observations of these phenomena, using dilute disorder clouds driven by a weak laser, in 2016 and several complementary studies (2017-2020), we are trying to determine if those phenomena can be useful for quantum-optical applications.

cold atoms
numerical simualtions

1. Weiss et al., Phys. Rev. A 103, 023702 (2021)
2. Cipris et al., Phys. Rev. Lett 126, 103604 (2021)
3. Cipris et al., Phys. Rev. A 103, 033714 (2021)
4. Darsheshdar et al., Phys. Rev. A 103, 053702 (2021)
5. Fofanov et al., Phys. Rev. A 104, 023705 (2021)

The scientific and technological challenge that will be addressed in this project is the conceptually and experimentally optimized quantum information processing and manipulation at interfaces for the successful implementation of scalable quantum technologies in combination with long distance quantum communication.

1. Weiss et al., Phys. Rev. A 103, 023702 (2021)
2. Cipris et al., Phys. Rev. Lett 126, 103604 (2021)
3. Cipris et al., Phys. Rev. A 103, 033714 (2021)
4. Darsheshdar et al., Phys. Rev. A 103, 053702 (2021)
5. Fofanov et al., Phys. Rev. A 104, 023705 (2021)

Functional devices for quantum information processing and communication must make use of appropriate matter-light interfaces. Their key role in bringing quantum devices towards practical applications is essential. Hence, building the conceptual and technological base for such interfaces will pave the way for the scalable quantum computation and quantum Internet. The overall objective of this proposal is to meet the critical challenge of studying, implementing and optimizing groundbreaking, dynamically-controlled interfaces between matter and light.

Photons can efficiently and durably transmit quantum information over large distances; cold, trapped ions can be manipulated to enable high-fidelity quantum information processing, while atomic ensembles are particularly suited for long-lived quantum memories, as well as nonlinear generation of non-classical correlations between optical beams. The aim of PACE-IN project is the development of reliable quantum interfaces between atomic systems and photons. We shall develop and demonstrate massive parallel processing, storage and transmission of quantum information by hitherto unexploited collective, multimode quantum states or atomic ensembles and ionic crystals, and design methods to characterize the entanglement and non-classicality of quantum states transferred from atoms and ions to photons.

Efficient interfacing mechanisms between “stationary” atomic qubits or ensembles and “flying” (photonic) quantum variables, whether discrete or continuous, must be robust and dynamically controllable to allow the best possible exploitation of their respective functionalities while maintaining the highest possible overall fidelity/coherence and speed. The scientific and technological challenge that will be addressed in this project is the conceptually and experimentally optimized quantum information processing and manipulation at interfaces for the successful implementation of scalable quantum technologies in combination with long distance quantum communication.

Project coordination

Robin Kaiser (Institut de Physique de Nice)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

PU Department of Optics, Palacky University
CNRS Institut de Physique de Nice
INFN INFN Sezione di Bari
WIS Weizmann Institute Science
UIBK UNIVERSITAET INNSBRUCK
FORTH Foundation for Research and Technology - Hellas

Help of the ANR 299,553 euros
Beginning and duration of the scientific project: February 2020 - 36 Months

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