A5066219635- Quantum Information and Cryptography
- Neural Networks and Reservoir Computing
- Quantum optics and atomic interactions
- Quantum Computing Algorithms and Architecture
- Photonic and Optical Devices
- Quantum and electron transport phenomena
- Quantum Mechanics and Applications
- Mechanical and Optical Resonators
- Optical Network Technologies
- Semiconductor Quantum Structures and Devices
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Semiconductor Lasers and Optical Devices
- Magnetic properties of thin films
- Neural Networks and Applications
- Characterization and Applications of Magnetic Nanoparticles
- Advanced Optical Sensing Technologies
- Strong Light-Matter Interactions
- Molecular Communication and Nanonetworks
- Advanced Fluorescence Microscopy Techniques
Université Paris-Saclay
2017-2025
Quandela (France)
2022-2024
Virginia Tech
2021-2024
Leiden University
2022-2024
Vinci (France)
2023-2024
Huygens Institute for History and Culture of the Netherlands
2022-2024
NTT Basic Research Laboratories
2023
Centre de Nanosciences et de Nanotechnologies
2017-2022
Centre National de la Recherche Scientifique
2017-2022
Délégation Paris 7
2017-2020
A boson-sampling device is a quantum machine expected to perform tasks intractable for classical computer, yet requiring minimal nonclassical resources as compared full-scale computers. Photonic implementations date employed sources based on inefficient processes that only simulate heralded single-photon statistics when strongly reducing emission probabilities. Boson sampling with input has thus never been realized. Here, we report operated bright solid-state source of Fock states high...
Quantum technology is now at a point where practical work can begin on creating the quantum internet. However, numerous challenges must be overcome before this vision becomes reality. A global-scale internet requires development of repeater, device that stores and manipulates qubits while interacting with or emitting entangled photons. This review examines different approaches to repeaters networks, covering their conceptual frameworks, architectures, current progress in experimental implementation.
Light states composed of multiple entangled photons-such as cluster states-are essential for developing and scaling-up quantum computing networks. Photonic can be obtained from single-photon sources entangling gates, but so far this has only been done with probabilistic constrained to intrinsically low efficiencies, an increasing hardware overhead. Here, we report the resource-efficient generation polarization-encoded, individually-addressable photons in linear occupying a single spatial...
Spin noise spectroscopy has become a widespread technique to extract information on spin dynamics in atomic and solid-state systems, potentially nonperturbative way. Here we experimentally demonstrate new approach spectroscopy, based the detection of single photons. Because large spin-dependent polarization rotations provided by deterministically coupled quantum dot-micropillar device, giant signals induced single-hole are extracted form photon-photon cross-correlations. Ultimately, such can...
Single-photon sources based on semiconductor quantum dots have emerged as an excellent platform for high efficiency light generation. However, scalability remains a challenge since generally present inhomogeneous characteristics. Here we benchmark the performance of 15 deterministically fabricated single-photon sources. They display average purity 95.4% ± 1.5% with mean wavepacket overlap 88.0% 3.1% corresponding to indistinguishability 92.2% 2.6% and homogeneity in operation wavelength...
Since linear-optical two-photon gates are inherently probabilistic, measurement-based implementations particularly well suited for photonic platforms: a large highly-entangled resource state, called graph is consumed through measurements to perform computation. The challenge thus produce these states. Several generation procedures, which use either interacting quantum emitters or efficient spin-photon interface, have been proposed create states deterministically. Yet, solutions still out of...
Quantum threshold theorems impose hard limits on the hardware capabilities to process quantum information. We derive tight and fundamental upper bounds loss-tolerance thresholds in different linear-optical information processing settings through an adversarial framework, taking into account intrinsically probabilistic nature of linear optical Bell measurements. For logical state measurements—ubiquitous operations photonic information—we demonstrate analytically that optics can achieve loss...
We introduce an adaptable and modular hybrid architecture designed for fault-tolerant quantum computing. It combines emitters linear-optical entangling gates to leverage the strength of both matter-based photonic-based approaches. A key feature is its practicality, grounded in utilisation experimentally proven optical components. Our framework enables execution any error correcting code, but particular maintains scalability low-density parity check codes by exploiting built-in non-local...
Many proposals to scale quantum technology rely on modular or distributed designs where individual processors, called nodes, are linked together form one large multinode computer (MNQC). One scalable method construct an MNQC is using superconducting systems with optical interconnects. However, a limiting factor of these machines will be internode gates, which may two three orders magnitude noisier and slower than local operations. Surmounting the limitations gates require range techniques,...
While multiphoton entangled states are the essential building blocks of quantum photonic technologies, large-scale production such has proven to be difficult. This study utilizes unique structure hole spins in dot molecules propose an approach that overcomes many existing obstacles deterministic generation states. With high fidelity and rates unmatched among currently available protocols, this proposal seems quite promising as a basis for tomorrow's optical communication hardware.
Three-level Lambda systems appear in various quantum information processing platforms. In several control schemes, the excited level serves as an auxiliary state for implementing gate operations between lower qubit states. However, extra levels give rise to unwanted transitions that cause leakage and other errors, degrading fidelity. We focus on a coherent-population-trapping scheme gates design protocols reduce effects of off-resonant couplings improve performance up orders magnitude. For...
Many proposals to scale quantum technology rely on modular or distributed designs wherein individual processors, called nodes, are linked together form one large multinode computer (MNQC). One scalable method construct an MNQC is using superconducting systems with optical interconnects. However, internode gates in these may be two three orders of magnitude noisier and slower than local operations. Surmounting the limitations will require improvements entanglement generation, use...
We introduce a tomography approach to describe the optical response of cavity quantum electrodynamics device, beyond semiclassical image polarization rotation, by analyzing density matrix reflected photons in Poincaré sphere.Applying this an electrically-controlled dot-cavity we show that single resonantly-excited dot induces large rotation 20 • latitude and longitude sphere, with purity remaining above 84%.The resonance fluorescence is shown contribute via its coherent part, whereas...
Several emerging quantum technologies, including networks, and modular fusion-based computing, rely crucially on the ability to perform photonic Bell state measurements. Therefore, photon losses 50% success probablity upper bound of measurements pose a critical limitation technologies. Here, we develop protocols that overcome these two key challenges through logical encoding qubits. Our approach uses tree graph encoding, which can be produced deterministically with few emitters, achieves...
Quantum communication technologies show great promise for applications ranging from the secure transmission of secret messages to distributed quantum computing. Due fiber losses, long-distance requires use repeaters, which there exist memory-based schemes and all-photonic schemes. While approaches based on graph states generated linear optics avoid coherence time issues associated with memories, they outperform repeater-less protocols only at expense a prohibitively large overhead in...
By encoding logical qubits into specific types of photonic graph states, one can realize quantum repeaters that enable fast entanglement distribution rates approaching classical communication. However, the generation these states requires a formidable resource overhead using traditional approaches based on linear optics. Overcoming this challenge, number new schemes have been proposed employ emitters to deterministically generate states. Although potential significantly reduce cost,...
Pillar microcavities are excellent light-matter interfaces, providing an electromagnetic confinement in small mode volumes with high quality factors. They also allow the efficient injection and extraction of photons, into from cavity, potentially near-unity input output-coupling efficiencies. Optimizing output coupling is essential, particular, development solid-state quantum networks where artificial atoms manipulated single incoming photons. Here, we propose a technique to accurately...
Developing future quantum communication may rely on the ability to engineer cavity-mediated interactions between photons and solid-state artificial atoms, in a deterministic way. Here, we report set of technological experimental developments for coupling optical mode micropillar cavity dot trion transition. We first identify charged transition through in-plane magnetic field spectroscopy, then tune its energy via in-situ lithography. In addition, design an asymmetric tunneling barrier allow...
A quantum internet is the holy grail of information processing, enabling deployment a broad range technologies and protocols on global scale. However, numerous challenges exist before can become reality. Perhaps most crucial these realization repeater, an essential component in long-distance transmission information. As analog classical extender, or booster, repeater works to overcome loss noise channels comprising network. Here, we review conceptual frameworks architectures for repeaters,...
We present an all-fiber compact scheme to scalably generate arbitrary number polarization entangled photons. A single solid-state quantum dot was utilized as a high-brightness photon source. demonstrate entanglement of up four
Spin noise spectroscopy has become a widespread technique to extract information on spin dynamics in atomic and solid-state systems, potentially non-invasive way, through the optical probing of fluctuations. Here we experimentally demonstrate new approach spectroscopy, based detection single photons. Due large spin-dependent polarization rotations provided by deterministically-coupled quantum dot-micropillar device, giant signals induced single-hole are extracted form photon-photon...
Fault-tolerant quantum computing is crucial for realizing large-scale computation, and the interplay between hardware architecture error-correcting codes a key consideration. We present comparative study of two - surface code honeycomb Floquet implemented on variants spin-optical architecture, enabling direct comparison using consistent noise models. Our results demonstrate that significantly outperforms in this setting. Notably, we achieve photon loss threshold 6.4% implementation to our...