Search Results for author: Omar Fawzi

Found 12 papers, 3 papers with code

Lower Bounds on Learning Pauli Channels

no code implementations22 Jan 2023 Omar Fawzi, Aadil Oufkir, Daniel Stilck França

In the adaptive setting, we show a lower bound of $\Omega(2^{2. 5n}\epsilon^{-2})$ for $\epsilon=\mathcal{O}(2^{-n})$, and a lower bound of $\Omega(2^{2n}\epsilon^{-2} )$ for any $\epsilon > 0$.

Sequential Algorithms for Testing Closeness of Distributions

no code implementations NeurIPS 2021 Aadil Oufkir, Omar Fawzi, Nicolas Flammarion, Aurélien Garivier

For a general alphabet size $n$, we give a sequential algorithm that uses no more samples than its batch counterpart, and possibly fewer if the actual distance between $\mathcal{D}_1$ and $\mathcal{D}_2$ is larger than $\epsilon$.

Quasi-polynomial time algorithms for free quantum games in bounded dimension

1 code implementation18 May 2020 Hyejung H. Jee, Carlo Sparaciari, Omar Fawzi, Mario Berta

We give a converging semidefinite programming hierarchy of outer approximations for the set of quantum correlations of fixed dimension and derive analytical bounds on the convergence speed of the hierarchy.

Quantum Physics

Learning dynamic polynomial proofs

no code implementations NeurIPS 2019 Alhussein Fawzi, Mateusz Malinowski, Hamza Fawzi, Omar Fawzi

In this work, we introduce a machine learning based method to search for a dynamic proof within these proof systems.

BIG-bench Machine Learning Inductive Bias

Entropy accumulation with improved second-order

1 code implementation29 May 2018 Frédéric Dupuis, Omar Fawzi

The entropy accumulation theorem states that the smooth min-entropy of an $n$-partite system $A = (A_1, \ldots, A_n)$ is lower-bounded by the sum of the von Neumann entropies of suitably chosen conditional states up to corrections that are sublinear in $n$.

Quantum Physics

Adversarial vulnerability for any classifier

no code implementations NeurIPS 2018 Alhussein Fawzi, Hamza Fawzi, Omar Fawzi

Despite achieving impressive performance, state-of-the-art classifiers remain highly vulnerable to small, imperceptible, adversarial perturbations.

General Classification

Robustness of classifiers to uniform $\ell\_p$ and Gaussian noise

no code implementations22 Feb 2018 Jean-Yves Franceschi, Alhussein Fawzi, Omar Fawzi

We study the robustness of classifiers to various kinds of random noise models.

Robustness of classifiers to universal perturbations: a geometric perspective

no code implementations ICLR 2018 Seyed-Mohsen Moosavi-Dezfooli, Alhussein Fawzi, Omar Fawzi, Pascal Frossard, Stefano Soatto

Deep networks have recently been shown to be vulnerable to universal perturbations: there exist very small image-agnostic perturbations that cause most natural images to be misclassified by such classifiers.

Universal adversarial perturbations

10 code implementations CVPR 2017 Seyed-Mohsen Moosavi-Dezfooli, Alhussein Fawzi, Omar Fawzi, Pascal Frossard

Given a state-of-the-art deep neural network classifier, we show the existence of a universal (image-agnostic) and very small perturbation vector that causes natural images to be misclassified with high probability.

Entropy accumulation

no code implementations6 Jul 2016 Frederic Dupuis, Omar Fawzi, Renato Renner

We ask the question whether entropy accumulates, in the sense that the operationally relevant total uncertainty about an $n$-partite system $A = (A_1, \ldots A_n)$ corresponds to the sum of the entropies of its parts $A_i$.

Quantum Physics Information Theory Information Theory

Analysis of classifiers' robustness to adversarial perturbations

no code implementations9 Feb 2015 Alhussein Fawzi, Omar Fawzi, Pascal Frossard

To the best of our knowledge, our results provide the first theoretical work that addresses the phenomenon of adversarial instability recently observed for deep networks.

General Classification

Quantum to Classical Randomness Extractors

no code implementations8 Nov 2011 Mario Berta, Omar Fawzi, Stephanie Wehner

Yet, when considering a physical randomness source, X is itself ultimately the result of a measurement on an underlying quantum system.

Quantum Physics

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