A5068922848- Quantum Information and Cryptography
- Neural Networks and Reservoir Computing
- Photonic and Optical Devices
- Quantum optics and atomic interactions
- Semiconductor Quantum Structures and Devices
- Optical Network Technologies
- Orbital Angular Momentum in Optics
- Advanced Thermodynamics and Statistical Mechanics
- Mechanical and Optical Resonators
- Quantum Mechanics and Applications
- Near-Field Optical Microscopy
- Physics of Superconductivity and Magnetism
- Spectroscopy and Quantum Chemical Studies
- Quantum and electron transport phenomena
- Advanced Optical Sensing Technologies
- Laser Design and Applications
- Quantum Computing Algorithms and Architecture
- Laser-Matter Interactions and Applications
- Magnetic and transport properties of perovskites and related materials
- Advanced Fiber Laser Technologies
- Characterization and Applications of Magnetic Nanoparticles
- Semiconductor Lasers and Optical Devices
- Plasmonic and Surface Plasmon Research
- Random lasers and scattering media
- Magnetic properties of thin films
Université Paris-Saclay
2021-2024
Centre National de la Recherche Scientifique
2021-2024
Quandela (France)
2023-2024
Centre de Nanosciences et de Nanotechnologies
2022-2023
Université Paris-Sud
2023
Polytechnique Montréal
2021
Abstract Quantum computing aims at exploiting quantum phenomena to efficiently perform computations that are unfeasible even for the most powerful classical supercomputers. Among promising technological approaches, photonic offers advantages of low decoherence, information processing with modest cryogenic requirements, and native integration networks. So far, demonstrations light have implemented specific tasks specialized hardware, notably Gaussian boson sampling, which permits...
Abstract Mutually entangled multi-photon states are at the heart of all-optical quantum technologies. While impressive progresses have been reported in generation such light using free space apparatus, high-fidelity high-rate on-chip entanglement is crucial for future scalability. In this work, we use a bright quantum-dot based single-photon source to demonstrate high fidelity 4-photon Greenberg-Horne-Zeilinger (GHZ) with low-loss reconfigurable glass photonic circuit. We reconstruct density...
How does quantum coherence impact energy exchanges between systems? This key question of thermodynamics is also prime importance for the management emerging technologies based on coherence. Pioneering theoretical frameworks have been proposed to describe role in energetic a qubit and electromagnetic field. Here, we experimentally study work transferred during spontaneous emission solid-state into reservoir modes field, step that energetically corresponds charging battery. We show amount...
We report on a universal method to measure the genuine indistinguishability of n-photons - crucial parameter that determines accuracy optical quantum computing. Our approach relies low-depth cyclic multiport interferometer with N = 2n modes, leading interference fringe whose visibility is direct measurement n-photon indistinguishability. experimentally demonstrate this technique for 8-mode integrated fabricated using femtosecond laser micromachining and four photons from dot single-photon...
Engineering single-photon states endowed with orbital angular momentum (OAM) is a powerful tool for quantum information photonic implementations. Indeed, due to its unbounded nature, OAM suitable encoding qudits, allowing single carrier transport large amount of information. Most the experimental platforms employ spontaneous parametric down-conversion processes generate photons, even if this approach intrinsically probabilistic, leading scalability issues an increasing number qudits....
Spins in semiconductor quantum dots are promising local memories to generate polarization-encoded photonic cluster states, as proposed the pioneering Rudolph-Lindner scheme [1]. However, harnessing polarization degree of freedom optical transitions is hindered by resonant excitation schemes that widely used obtain high photon indistinguishability. Here we show acoustic phonon-assisted excitation, a preserves indistinguishability, also allows fully exploit selective initialise and measure...
Quantum computing aims at exploiting quantum phenomena to efficiently perform computations that are unfeasible even for the most powerful classical supercomputers. Among promising technological approaches, photonic offers advantages of low decoherence, information processing with modest cryogenic requirements, and native integration networks. To date, demonstrations light have implemented specific tasks specialized hardware, notably Gaussian Boson Sampling which permitted computational...
Energy can be transferred between two quantum systems in forms: unitary energy-that used to drive another system-and correlation reflects past correlations. We propose and implement experimental protocols access these energy transfers interactions a emitter light fields. Upon spontaneous emission, we measure the transfer from field show that it never exceeds half total is reduced when introducing decoherence. then study interference of emitted coherent laser at beam splitter nature...
Mutually entangled multi-photon states are at the heart of all-optical quantum technologies. While impressive progresses have been reported in generation such light using free space apparatus, high-fidelity high-rate on-chip entanglement is crucial for future scalability. In this work, we use a bright quantum-dot based single-photon source to demonstrate high fidelity 4-photon Greenberg-Horne-Zeilinger (GHZ) with low-loss reconfigurable glass photonic circuit. We reconstruct density matrix...
We report on a universal method to measure the genuine indistinguishability of n-photons - crucial parameter that determines accuracy optical quantum computing. Our approach relies low-depth cyclic multiport interferometer with N = 2n modes, leading interference fringe whose visibility is direct measurement n-photon indistinguishability. experimentally demonstrate this technique for 8-mode integrated fabricated using femtosecond laser micromachining and four photons from dot single-photon...
Semiconductor quantum dots in microcavities are an excellent platform for the efficient generation of indistinguishable single photons. However, their use a wide range technologies requires controlled fabrication and integration compact closed-cycle cryocoolers, with key challenge being stable extraction photons into single-mode fiber. Here we report on novel method fiber-pigtailing deterministically fabricated single-photon sources. Our technique allows nanometer-scale alignment accuracy...
Generating identical photons from remote emitter-based bright single-photon sources is an important step for scaling up optical quantum technologies. Here, we study the Hong-Ou-Mandel interference of emitted based on semiconductor dots. We make use a deterministic fabrication technique to position dots in spectrally resonant micropillar cavity and fine tune their operation wavelength electrically. Doing so, can match four pairs between five distinct sources, them under various excitation...
We present a laser-written glass photonic circuit that, in synergy with quantum dot based single photon source, generates four-photon Greenberger-Horne-Zeilinger entangled state at the rate of 0.5 Hz 86.0 ± 0.4% fidelity.
The integration of Quantum Computers (QC) within High-Performance Computing (HPC) environments holds significant promise for solving real-world problems by leveraging the strengths both computational paradigms. However, a complex QC platform in an HPC infrastructure poses several challenges, such as operation stability non-laboratory like environments, and scarce access maintenance. Currently, only few fully-assembled QCs currently exist worldwide, employing highly heterogeneous cutting-edge...
Motional narrowing is a phenomenon by which quantum state can be entangled with noisy environment and still retain its intrinsic coherence. Using two optically induced motional forces driving the environmental electrical field amplitude fluctuations, we present compelling illustration of effects on energy, line shape, width single emitter, Te2 molecule embedded in ZnSe, subject to spectral diffusion. achieved several regimes, irrespectively inhomogeneous disorder initially charge reservoir...
Abstract: We propose a scalable measurement of the indistinguishability n-photon state harnessing multi-port interferometer. demonstrate this method using four photons from quantum dot single-photon source with an integrated cyclic
The generation of quantum states many indistinguishable photons is a crucial resource for the realization photonic computer architectures that can enable speedup and create fault-tolerant multi-party networks. On experimental side, measurement indistinguishability multi-photon state challenging task. In case two-photon state, photon fully assessed by visibility interference fringe Hong-Ou-Mandel (HOM) experiment on balanced beam splitter. However, pairwise HOM experiments are unable to...
The on-demand generation of orbital angular momentum entangled states is a pivotal task in quantum information. Here, we investigated it both the inter- and intraparticle regime producing single photons via dot source.
The integration of Quantum Computers (QC) within High-Performance Computing (HPC) environments holds significant promise for solving real-world problems by leveraging the strengths both computational paradigms. However, a complex QC platform in an HPC infrastructure poses several challenges, such as operation stability non-laboratory like environments, and scarce access maintenance. Currently, only few fully-assembled QCs currently exist worldwide, employing highly heterogeneous cutting-edge...
Engineering single-photon states endowed with Orbital Angular Momentum (OAM) is a powerful tool for quantum information photonic implementations. Indeed, thanks to its unbounded nature, OAM suitable encode qudits allowing single carrier transport large amount of information. Nowadays, most the experimental platforms use nonlinear crystals generate photons through Spontaneous Parametric Down Conversion processes, even if this kind approach intrinsically probabilistic leading scalability...
We introduce a novel method to directly characterize the indistinguishability of state multiple photons using multiport interferometer. demonstrate this four from quantum dot single-photon source.