294 citations · 1.5k across the 55 of their papers we have counts for
57 papers
Temporal modes of quantum states of light scattered by a two-level system
Yann Bouchereau, Lucas Weitzel, Valérian Thiel +3
Non-Gaussian quantum states of light are of paramount importance to quantum computing. Nevertheless, their deterministic generation is challenging problem due to the difficulty to…
Certification of genuine non-Gaussian entanglement
Lukáš Lachman, Carlos E. Lopetegui-González, Massimo Frigerio +1
Entanglement is a key resource for many quantum applications. Understanding fundamental properties of entangled states is an important step towards their practical exploitation. We…
A unified framework for data-driven Bell inequalities
Carlos Ernesto Lopetegui-González, Gaël Massé, Enky Oudot +6
Although the original EPR paradox was formulated in terms of position and momentum, most studies of these phenomena have focused on measurement scenarios with only a discrete numbe…
Geometric characterization of non-Gaussian entanglement for finite stellar rank states
Carlos E. Lopetegui-Gonzalez, Massimo Frigerio, Mattia Walschaers
We introduce a general framework for the analysis of non-Gaussian entanglement in bosonic states of finite stellar rank. The central result is the full characterization of their en…
Photon catalysis for general multimode multi-photon quantum state preparation
Andrei Aralov, Émilie Gillet, Viet Nguyen +3
Multimode multiphoton states are at the center of many photonic quantum technologies, from photonic quantum computing to quantum sensing. In this work, we derive a procedure to gen…
Joint estimation of position and momentum with arbitrarily high precision using non-Gaussian states
Massimo Frigerio, Matteo G. A. Paris, Carlos Ernesto Lopetegui +1
We address the joint estimation of changes in the position and linear momentum of a quantum particle or, equivalently, changes in the complex field of a bosonic mode. Although thes…
Entanglement routing via passive optics in CV-networks
David Fainsin, Antoine Debray, Ilya Karuseichyk +2
Large-scale operations in quantum networks require efficient sorting of desired paths between nodes. In this article, we consider entanglement routing, which involves establishing…
Optimal Moment-based Characterization of a Gaussian State
Niels Tripier-Mondancin, Ilya Karuseichyk, Mattia Walschaers +2
Fast and precise characterization of Gaussian states is crucial for their effective use in quantum technologies. In this work, we apply a multi-parameter moment-based estimation me…
Resourcefulness of non-classical continuous-variable quantum gates
Massimo Frigerio, Antoine Debray, Nicolas Treps +1
In continuous-variable quantum computation, identifying key elements that enable a quantum computational advantage is a long-standing issue. Starting from the standard results on t…
Purification of Gaussian States by Photon Subtraction
Kun Zhang, Huijun Li, Jietai Jing +2
Photon subtraction can enhance entanglement, which for pure states induces a decrease in the purity of reduced states. In contrast, by analyzing the purities of Gaussian states bef…
Detection of mode-intrinsic quantum entanglement
Carlos E. Lopetegui, Mathieu Isoard, Nicolas Treps +1
Quantum correlations are at the core of the power of quantum information and are necessary to reach a quantum computational advantage. In the context of continuous-variable quantum…
Non-Gaussian state teleportation with a nonlinear feedforward
Vojtěch Kala, Mattia Walschaers, Radim Filip +1
Measurement-induced quantum computation with continuous-variable cluster states utilizes teleportation to transmit and alter quantum states via measurement-and-feedforward control.…
Exploiting separation-dependent coherence to boost optical resolution
Ilya Karuseichyk, Giacomo Sorelli, Vyacheslav Shatokhin +2
The problem of resolving point-like light sources not only serves as a benchmark for optical resolution but also holds various practical applications ranging from microscopy to ast…
Correlation-pattern-based Continuous-variable Entanglement Detection through Neural Networks
Xiaoting Gao, Mathieu Isoard, Fengxiao Sun +5
Entanglement in continuous-variable non-Gaussian states provides irreplaceable advantages in many quantum information tasks. However, the sheer amount of information in such states…
Ultra-sensitive separation estimation of optical sources
Clémentine Rouvière, David Barral, Antonin Grateau +4
Historically, the resolution of optical imaging systems was dictated by diffraction, and the Rayleigh criterion was long considered an unsurpassable limit. In superresolution micro…
Practical tests for sub-Rayleigh source discriminations with imperfect demultiplexers
Konrad Schlichtholz, Tomasz Linowski, Mattia Walschaers +3
Quantum-optimal discrimination between one and two closely separated light sources can be achieved by ideal spatial-mode demultiplexing, simply monitoring whether a photon is detec…
Metrological detection of entanglement generated by non-Gaussian operations
David Barral, Mathieu Isoard, Giacomo Sorelli +3
Entanglement and non-Gaussianity are physical resources that are essential for a large number of quantum-optics protocols. Non-Gaussian entanglement is indispensable for quantum-co…
On Quantum Steering and Wigner Negativity
Mattia Walschaers
Quantum correlations and Wigner negativity are two important signatures of nonclassicality in continuous-variable quantum systems. In this work, we investigate how both are intertw…
Application range of crosstalk-affected spatial demultiplexing for resolving separations between unbalanced sources
Tomasz Linowski, Konrad Schlichtholz, Giacomo Sorelli +4
Superresolution is one of the key issues at the crossroads of contemporary quantum optics and metrology. Recently, it was shown that for an idealized case of two balanced sources,…
Resources for bosonic quantum computational advantage
Ulysse Chabaud, Mattia Walschaers
Quantum computers promise to dramatically outperform their classical counterparts. However, the non-classical resources enabling such computational advantages are challenging to pi…
Quantum limits for resolving Gaussian sources
Giacomo Sorelli, Manuel Gessner, Mattia Walschaers +1
We determine analytically the quantum Cramér-Rao bound for the estimation of the separation between two point sources in arbitrary Gaussian states. Our analytical expression is val…
Gaussian quantum metrology for mode-encoded parameters
Giacomo Sorelli, Manuel Gessner, Nicolas Treps +1
Quantum optical metrology aims to identify ultimate sensitivity bounds for the estimation of parameters encoded into quantum states of the electromagnetic field. In many practical…
Homodyne detection of non-Gaussian quantum steering
Carlos E. Lopetegui, Manuel Gessner, Matteo Fadel +2
Quantum correlations are at the core of current developments in quantum technologies. Certification protocols of entanglement and steering, suitable for continuous-variable non-Gau…
Resolving Mutually Coherent Bright Point-Sources
Ilya Karuseichyk, Giacomo Sorelli, Manuel Gessner +2
We analyze the problem of resolving two point-sources in the case of mutually coherent sources with arbitrary quantum statistics, mutual phase, relative and absolute intensity. We…