A5027841451- Quantum Information and Cryptography
- Quantum optics and atomic interactions
- Photonic and Optical Devices
- Neural Networks and Reservoir Computing
- Optical Network Technologies
- Quantum Mechanics and Applications
- Quantum Computing Algorithms and Architecture
- Mechanical and Optical Resonators
- Advanced Fiber Laser Technologies
- Photorefractive and Nonlinear Optics
- Atomic and Subatomic Physics Research
- Laser Design and Applications
- Semiconductor Lasers and Optical Devices
- Physical Unclonable Functions (PUFs) and Hardware Security
- Quantum-Dot Cellular Automata
- Semiconductor Quantum Structures and Devices
- Random lasers and scattering media
- Computability, Logic, AI Algorithms
- Advancements in Semiconductor Devices and Circuit Design
- Probability and Statistical Research
- Laser-Matter Interactions and Applications
- Biomedical Text Mining and Ontologies
- Advanced Optical Sensing Technologies
Quandela (France)
2023-2024
Vinci (France)
2023-2024
University of Geneva
2020-2022
Institute of Photonic Sciences
2014-2018
Universitat Politècnica de Catalunya
2018
J.M. Huber Corporation (United States)
2018
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...
Photonic integrated circuits offer a compact and stable platform for generating, manipulating, detecting light. They are instrumental classical quantum applications. Imperfections stemming from fabrication constraints, tolerances, operation wavelength impose limitations on the accuracy thus utility of current photonic devices. Mitigating these imperfections typically necessitates model underlying physical structure estimation parameters that challenging to access. Direct solutions currently...
Integrated photonics represents a technology that could greatly improve quantum communication networks in terms of cost, size, scaling, and robustness.A key benchmark for this is to demonstrate their performance complex networking protocols, such as entanglement swapping between independent photon-pair sources.Here, using time-resolved detection, two integrated Si3N4 microring resonator sources, operating the CW regime at telecom wavelengths, we obtained spectral purities up 0.97 ± 0.02 HOM...
Abstract Photonic platforms occupy a central place in quantum technologies. They appear networks and communication, near-term advantage schemes, as well fault-tolerant computing proposals. In this perspective article, we review the advances challenges of technology, focus on algorithms protocols that call photon-native, i.e. which closely follow specificities hardware.
We report on an experiment that demonstrates the frequency up-conversion of telecommunication wavelength single-photon-level pulses to be resonant with a : crystal. convert telecom photons at using periodically-poled potassium titanyl phosphate nonlinear waveguide. The maximum device efficiency (which includes all optical loss) is inferred (internal ) signal noise ratio exceeding 1 for durations up 560 ns. converted light then stored in crystal atomic comb scheme storage and retrieval...
Future ground-based quantum information networks will likely use single photons transmitted through optical fibers to entangle individual network nodes.To extend communication distances and overcome limitations due photon absorption in fibers, the concept of repeaters has been proposed.For that purpose, it is required achieve correlations between material nodes at telecom wavelengths, which can be sent over long fibers.Here, we demonstrate nonclassical correlation a frequency-converted...
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...
We report on quantum frequency conversion of memory-compatible narrow-bandwidth photons at 606 nm to the telecom C-band 1552$\,$nm. The 200$\,$ns long photons, compatible with Praseodymium-based solid-state memories are converted using a single-step difference generation process in periodically poled Lithium Niobate waveguide. characterize noise processes involved and by applying strong spectral filtering noise, we demonstrate high signal-to-noise ratio single photon level (SNR$\,>\,$100 for...
We report the experimental realization of heralded distribution single-photon path entanglement at telecommunication wavelengths in a repeater-like architecture. The is established upon detection single photon, originating from one two spontaneous parametric down conversion photon pair sources, after erasing photon's which-path information. In order to certify entanglement, we use an witness which does not rely on post-selection. herald between locations, separated by total distance 2 km...
Reliable randomness is a core ingredient in algorithms and applications ranging from numerical simulations to statistical sampling cryptography. The outcomes of measurements on entangled quantum states can violate Bell inequalities, thus guaranteeing their intrinsic randomness. This constitutes the basis for certified generation. However, this certification requires spacelike separated devices, making it unfit compact apparatus. Here we provide general method generation small-scale...
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...
How can a multipartite single-photon path-entangled state be certified efficiently by means of local measurements? We address this question constructing an entanglement witness based on photon detections preceded displacement operations to reveal genuine entanglement. Our is defined as sum three observables that measured locally and assessed with two measurement settings for any number parties <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>N</mml:mi></mml:math>. For...
We present protocols for quantum key distribution in a prepare-and-measure setup with an asymmetric level of trust. While the device sender (Alice) is partially characterized, receiver&apos;s (Bob&apos;s) treated as black-box. The security based on assumption that Alice&apos;s prepared states have limited overlaps, but no explicit bound Hilbert space dimension required. are immune to attacks device, such blinding attacks. users can establish secret while continuously monitoring...
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...
Reliable randomness is a core ingredient in algorithms and applications ranging from numerical simulations to statistical sampling cryptography. The outcomes of measurements on entangled quantum states can violate Bell inequalities, thus guaranteeing their intrinsic randomness. This constitutes the basis for certified generation. However, this certification requires spacelike separated devices, making it unfit compact apparatus. Here we provide general method generation small-scale...
Photonic integrated circuits (PICs) are attractive platforms for manipulating quantum light. Imperfections limit the fidelity of photonically information protocols. We use machine learning and a clear box approach to characterize large PICs mitigate imperfections, achieving high-fidelity scalable implementations.
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...
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...