Publications related to Analysis of a Reputation System for Mobile Ad-Hoc Networks with Liars

Critical properties of the quantum Ashkin-Teller chain with chiral perturbations

We investigate the nature of the phase transitions in the quantum Ashkin-Teller chain in the presence of chiral perturbations. We locate the Lifshitz line separating a region of direct chiral transitions from the region where the transition is through an i ...

College Pk2023

Thermal critical points from competing singlet formations in fully frustrated bilayer antiferromagnets

Frédéric Mila, Antoine Yves Dimitri Fache

We examine the ground-state phase diagram and thermal phase transitions in a plaquettized fully frustrated bilayer spin-1/2 Heisenberg model. Based on a combined analysis from sign-problem free quantum Monte Carlo simulations, perturbation theory, and free ...

AMER PHYSICAL SOC2022

Lifshitz point at commensurate melting of chains of Rydberg atoms

Frédéric Mila, Natalia Chepiga

The recent investigation of chains of Rydberg atoms has brought back the problem of commensurateincommensurate transitions into the focus of current research. In two-dimensional classical systems or in one-dimensional quantum systems, the commensurate melt ...

AMER PHYSICAL SOC2021

Critical values in an anisotropic percolation on $\mathbb{Z}^2$

Hao Xue

In this thesis, we consider an anisotropic finite-range bond percolation model on

\mathbb{Z}^2

. On each horizontal layer

\{(x,i):x\in\mathbb{Z}\}

for

i\in\mathbb{Z}

, we have edges

\langle(x,i),(y,i)\rangle

for

1\leq|x-y|\leq N

with $N\in\mathbb{N ...

EPFL2021

A quantum magnetic analogue to the critical point of water

Henrik Moodysson Rønnow, Frédéric Mila, Bruce Normand, Ellen Fogh, Ludger Weber, Mohamed Zayed, Julio Antonio Larrea Jiménez, Kazimierz Conder

At the liquid-gas phase transition in water, the density has a discontinuity at atmospheric pressure; however, the line of these first-order transitions defined by increasing the applied pressure terminates at the critical point(1), a concept ubiquitous in ...

2021

Floating, critical, and dimerized phases in a frustrated spin-3/2 chain

Frédéric Mila, Natalia Chepiga

We study spontaneous dimerization and emergent criticality in a spin-3/2 chain with antiferromagnetic nearestneighbor J(1), next-nearest-neighbor J(2), and three-site J(3) interactions. In the absence of three-site interaction J(3), we provide evidence tha ...

AMER PHYSICAL SOC2020

Quantum phase transitions beyond Landau-Ginzburg theory in one-dimensional space revisited

The phase diagram of the quantum spin-1/2 antiferromagnetic J(1)-J(2) XXZ chain was obtained by Haldane using bosonization techniques [Haldane, Phys. Rev. B 25, 4925 (1982); 26, 5257 (1982)]. It supports three distinct phases for 0

2019

Can Who-Edits-What Predict Edit Survival?

Matthias Grossglauser, Lucas Maystre, Victor Kristof

As the number of contributors to online peer-production systems grows, it becomes increasingly important to predict whether the edits that users make will eventually be beneficial to the project. Existing solutions either rely on a user reputation system o ...

ACM2018

Dimerization and exotic criticality in spin-S chains

Natalia Chepiga

In this thesis we have studied the emergence of spontaneously dimerized phases in frustrated spin-S chains, with emphasis on the nature of the critical lines between the dimerized and non-dimerized phases. The main numerical method used in this thesis is t ...

EPFL2017

AnonRep: Towards Tracking-Resistant Anonymous Reputation

Bryan Alexander Ford, Ennan Zhai

Reputation systems help users evaluate information quality and incentivize civilized behavior, often by tallying feedback from other users such as "likes" or votes and linking these scores to a user’s long-term identity. This identity linkage enables user ...

USENIX2016

Analysis of a Reputation System for Mobile Ad-Hoc Networks with Liars

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Critical properties of the quantum Ashkin-Teller chain with chiral perturbations

Thermal critical points from competing singlet formations in fully frustrated bilayer antiferromagnets

Lifshitz point at commensurate melting of chains of Rydberg atoms

Critical values in an anisotropic percolation on $\mathbb{Z}^2$

A quantum magnetic analogue to the critical point of water

Floating, critical, and dimerized phases in a frustrated spin-3/2 chain

Quantum phase transitions beyond Landau-Ginzburg theory in one-dimensional space revisited

Can Who-Edits-What Predict Edit Survival?

Dimerization and exotic criticality in spin-S chains

AnonRep: Towards Tracking-Resistant Anonymous Reputation

Quantum phase transitions beyond Landau-Ginzburg theory in one-dimensional space revisited

Can Who-Edits-What Predict Edit Survival?

Critical properties of the quantum Ashkin-Teller chain with chiral perturbations

Critical values in an anisotropic percolation on $\mathbb{Z}^2$

Lifshitz point at commensurate melting of chains of Rydberg atoms

AnonRep: Towards Tracking-Resistant Anonymous Reputation

A quantum magnetic analogue to the critical point of water

Floating, critical, and dimerized phases in a frustrated spin-3/2 chain

Thermal critical points from competing singlet formations in fully frustrated bilayer antiferromagnets

Dimerization and exotic criticality in spin-S chains