26ème Congrès Général de la SFP

Session

Mini-colloques: MC08 Dernières avancées dans le domaine des technologies quantiques

3 juil. 2023, 16:45

Centre des Congrès de la Villette (Cité des sciences et de l'Industrie, Paris)

528. Josephson waveguide: a new platform for quantum optics

Nicolas ROCH (Institut Néel, Grenoble)

03/07/2023 16:45

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

Josephson waveguides have recently emerged as very promising platform for superconducting quantum science and technologies. Their distinguishing potential resides in ability to engineer them at sub-wavelength scales, which allows complete control over wave dispersion and nonlinear interaction. In this talk I will discuss a Josephson waveguide with strong third order nonlinearity, which can be...

387. Quantum control of an ultracoherent mechanical resonator with a fluxonium qubit

Kyrylo GERASHCHENKO (Laboratoire Kastler Brossel, CNRS, Laboratoire de Physique de l'ENS, Collège de France, Sorbonne University)

03/07/2023 17:25

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

Nowadays, the state-of-the-art chip-scale phononic-crystal membranes can achieve lifetimes over 100 s and coherence times in the order of seconds in a thermal environment at 10 mK. [1]. It can be achieved using softly-clamped silicon-nitride membranes (typically in MHz frequency range). The strong coupling between these outstanding mechanical resonators and the superconducting qubits...

482. Single-electron-spin resonance by microwave photon counting

Emmanuel Flurin (SPEC - CEA)

03/07/2023 17:45

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

Electron spin resonance (ESR) spectroscopy is the method of choice for characterizing paramagnetic impurities in a sample, with applications ranging from chemistry to quantum computing but it gives access only to ensemble-averaged quantities due to its limited signal-to-noise ratio. Here, we report a new method for the detection of single electron spins at millikelvin temperatures. Analogous...

410. Interaction ion-ion véhiculée par la contrainte dans les cristaux dopés aux ions de terres rares

Anne LOUCHET-CHAUVET (Institut Langevin)

03/07/2023 18:05

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

Les ions de terre rare en matrice cristalline sont aujourd'hui au coeur d'intenses efforts de recherche fondamentale et appliquée, relevant des technologies quantiques (mémoires optiques, mémoires micro-ondes, transduction optique-micro-ondes, calcul quantique), mais aussi du traitement de signaux (analyse spectrale de signaux radio-fréquence, retournement temporel, ou encore filtrage). Dans...

37. ANALOGUE QUANTUM SIMULATION OF ROTATING BLACK HOLES IN POLARITONS

Killian Guerrero-Feuillet (Laboratoire Kastler Brossel)

03/07/2023 18:25

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

Since their discovery, black holes have motivated many theoretical works in the framework of general relativity, where the curvature of spacetime and trajectory of particles are of particular interest. Furthermore, they have also driven the theoretical study of quantum field effects such as Hawking radiation or rotational superradiance, although these remain unobserved due to their very weak...

529. Communications sûres dans un monde quantique

Eleni DIAMANTI (CNRS, Sorbonne Université)

05/07/2023 08:30

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

Les technologies quantiques ont le potentiel d'améliorer d’une manière inédite la sécurité et l'efficacité des communications dans les infrastructures de réseau. Dans cet exposé, nous discutons du paysage actuel de la communication et de la cryptographie quantiques, et nous nous concentrons en particulier sur des implémentations photoniques des protocoles de réseaux quantiques, permettant la...

243. Entangled photonic qudits encoded in 21GHz spaced frequency bins generated on-chip using a silicon microring for Quantum Communications with telecom devices.

George CRISAN (Centre de Nanosciences et de Nanotechnologies, C2N)

05/07/2023 09:10

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

High dimensional quantum states, qudits, leverage the ability to store more information in a single photon. They can be used for quantum computing and quantum cryptography, as they are also enable more tolerant to noise [1]. Frequency domain, for example, grants access to a high dimensional Hilbert space. It is furthermore compatible with integration and can leverage multiplexing, since all...

332. A faster source to generate optical Schrödinger cat states

Viviane Cotte

05/07/2023 09:30

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

The field of quantum information consists in exploiting quantum superposition of information bits to bring new perspectives for multiple applications such as quantum communications or quantum computing. Our team works on the development of one possible way to encode quantum information with light. Indeed, it is possible to use coherent state coding, with optical Schrödinger cat states, as a...

408. Broadband Biphoton Generation and Polarization Splitting in a Monolithic AlGaAs Chip

Othmane Meskine (Université Paris Cité, CNRS, Laboratoire Matériaux et Phénoménes Quantiques, 75013 Paris, France)

05/07/2023 09:50

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

Summary
Integrated quantum photonics is a key tool towards large scale quantum technologies. In this work we present an AlGaAs-based photonic circuit for on-chip generation and manipulation of broadband orthogonally polarized photon pairs [1]. Among different platforms used for the development of quantum photonic chips AlGaAs is extremely interesting for integrability [2]. This material...

355. Deterministic Free-Propagating Photonic Qubits with Negative Wigner Functions

Valentin MAGRO (JEIP, Collège de France)

05/07/2023 10:10

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

Engineering quantum states of free-propagating light is of paramount importance for quantum technologies. Coherent states ubiquitous in classical and quantum communications, squeezed states used in quantum sensing, and even highly-entangled cluster states studied in the context of quantum computing can be produced deterministically, but they obey quasi-classical optical field statistics...

517. Magnetism and spin squeezing with arrays of Rydberg atoms

antoine Browaeys (Institut d'Optique, CNRS)

06/07/2023 08:30

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

This talk will present our recent work on the use of arrays of Rydberg atoms to study quantum magnetism and to generate entangled states useful for quantum metrology. We rely on laser-cooled ensembles of up to hundred individual atoms trapped in microscopic optical tweezer arrays. By exciting the atoms into Rydberg states, we make them interact by the resonant dipole interaction. The system...

302. Ten quectonewton local force sensor with atom interferometry

Yann Balland (SYRTE / Observatoire de Paris)

06/07/2023 09:10

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

Atom interferometers are exquisite tools for force measurements such as gravity. However, state-of-the-art such sensors use free-falling atoms and hence cannot perform purely local force measurements. Instead, we use here optically trapped atoms to perform force sensing close to the surface of a mirror and probe with unprecedented sensitivity atom-surface interactions.

We start with a...

292. Métrologie quantique avec des horloges optiques

Jérôme Lodewyck (LNE-SYRTE Observatoire de Paris)

06/07/2023 09:30

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

Les horloges à réseau optique sont des étalons de fréquence qui utilisent une transition optique de grand facteur de qualité dans un ensemble d'atomes froids dans un piège dipolaire. Elles offrent maintenant des incertitudes statistiques et systématiques proches de 10⁻¹⁸, avec des applications en physique fondamentale, en géodésie... À ce niveau de performances, le bruit quantique devient une...

112. Observation of Universal Hall Response in Strongly Interacting Fermions

Michele Filippone (CEA Grenoble)

06/07/2023 09:50

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

The Hall effect, which originates from the motion of charged particles in a magnetic field, has deep consequences for the description and characterization of materials, extending far beyond the original context of condensed matter physics. Although the Hall effect for non-interacting particles is well explained, understanding it in interacting systems still represents a fundamental challenge...

432. Measurements of Quantum correlations, and characterization of quantum thermalization, in a dipolar interacting spin system

Laurent VERNAC (Laboratoire de Physique des Lasers)

06/07/2023 10:10

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

We experimentally study quantum magnetism using interacting spin systems made of lattice trapped magnetic atoms. The dipolar interactions between spins frozen on lattice sites gives rise to a beyond mean field spin dynamics, after excitation in an out of equilibrium initial state. This dynamic leads to a steady state compatible with the ETH scenario of quantum thermalization, in which the...

344. Analogue quantum simulation of the Hawking effect with a polariton superfluid

Maxime JACQUET (Laboratoire Kastler Brossel, Sorbonne Université et CNRS)

MC8 Dernières avancées dans le domaine des technologies quantiques

Contribution orale

Analogue Gravity is a type of analogue quantum simulation that aims at observing effects initially predicted by quantum field theory on curved spacetime, such as the Hawking effect and rotational superradiance, in systems at laboratory scales with similar dynamics [1].

The high tunability of such systems enables to shed light on phenomena that are either currently eluding our comprehension...