Results for "Chiara Sabatti"

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Controlling FDR while highlighting selected discoveriesSep 06 2018Nov 06 2018Often modern scientific investigations start by testing a very large number of hypotheses in an effort to comprehensively mine the data for possible discoveries. Multiplicity adjustment strategies are employed to ensure replicability of the results of ... More
Gene Hunting with Knockoffs for Hidden Markov ModelsJun 14 2017Modern scientific studies often require the identification of a subset of relevant explanatory variables, in the attempt to understand an interesting phenomenon. Several statistical methods have been developed to automate this task, but only recently ... More
Reconstructing DNA copy number by joint segmentation of multiple sequencesFeb 22 2012Mar 14 2012The variation in DNA copy number carries information on the modalities of genome evolution and misregulation of DNA replication in cancer cells; its study can be helpful to localize tumor suppressor genes, distinguish different populations of cancerous ... More
Adaptive Filtering Multiple Testing Procedures for Partial Conjunction HypothesesOct 11 2016The partial conjunction (PC) alternative hypothesis $H^{r/n}_1$ stipulates that at least $r$ of $n$ related basic hypotheses are non-null, making it a useful measure of replicability. Motivated by genomic problems we consider a setting with a large number ... More
Selection-adjusted inference: an application to confidence intervals for cis-eQTL effect sizesJan 26 2018Jun 07 2018The goal of eQTL studies is to identify the genetic variants that influence the expression levels of the genes in an organism. High throughput technology has made such studies possible: in a given tissue sample, it enables us to quantify the expression ... More
Rejoinder: "Gene Hunting with Hidden Markov Model Knockoffs"Mar 13 2019In this paper we deepen and enlarge the reflection on the possible advantages of a knockoff approach to genome wide association studies (Sesia et al., 2018), starting from the discussions in Bottolo & Richardson (2019); Jewell & Witten (2019); Rosenblatt ... More
Detecting Replicating Signals using Adaptive Filtering Procedures with the Application in High-throughput ExperimentsOct 11 2016Sep 26 2018Replicability is a fundamental quality of scientific discoveries: we are interested in those signals that are detectable in different laboratories, study populations, across time etc. Testing a partial conjunction (PC) hypothesis is a statistical procedure ... More
Sparse regulatory networksNov 08 2010In many organisms the expression levels of each gene are controlled by the activation levels of known "Transcription Factors" (TF). A problem of considerable interest is that of estimating the "Transcription Regulation Networks" (TRN) relating the TFs ... More
Reconstructing DNA copy number by penalized estimation and imputationJun 12 2009Jan 10 2011Recent advances in genomics have underscored the surprising ubiquity of DNA copy number variation (CNV). Fortunately, modern genotyping platforms also detect CNVs with fairly high reliability. Hidden Markov models and algorithms have played a dominant ... More
Many Phenotypes without Many False Discoveries: Error Controlling Strategies for Multi-Traits Association StudiesApr 02 2015The genetic basis of multiple phenotypes such as gene expression, metabolite levels, or imaging features is often investigated by testing a large collection of hypotheses, probing the existence of association between each of the traits and hundreds of ... More
Testing hypotheses on a tree: new error rates and controlling strategiesMay 22 2017Oct 23 2018We introduce a multiple testing procedure (TreeBH) which addresses the challenge of controlling error rates at multiple levels of resolution. Conceptually, we frame this problem as the selection of hypotheses which are organized hierarchically in a tree ... More
SLOPE - Adaptive variable selection via convex optimizationJul 14 2014Nov 04 2015We introduce a new estimator for the vector of coefficients $\beta$ in the linear model $y=X\beta+z$, where $X$ has dimensions $n\times p$ with $p$ possibly larger than $n$. SLOPE, short for Sorted L-One Penalized Estimation, is the solution to \[\min_{b\in\mathbb{R}^p}\frac{1}{2}\Vert ... More
Triplet seesaw model: from inflation to asymmetric dark matter and leptogenesisSep 06 2012The nature of dark matter (DM) particles and the mechanism that provides their measured relic abundance are currently unknown. Likewise, the nature of the inflaton is unknown as well. We investigate the triplet seesaw model in an unified picture. At high ... More
Constructor Theory of ProbabilityJul 12 2015May 08 2016Unitary quantum theory, having no Born Rule, is non-probabilistic. Hence the notorious problem of reconciling it with the unpredictability and appearance of stochasticity in quantum measurements. Generalising and improving upon the so-called 'decision-theoretic ... More
Constructor Theory of LifeJul 01 2014Nov 04 2014Neo-Darwinian evolutionary theory explains how the appearance of purposive design in the sophisticated adaptations of living organisms can have come about without their intentionally being designed. The explanation relies crucially on the possibility ... More
Some remarks on moduli spaces of lattice polarized holomorphic symplectic manifoldsDec 07 2015We construct quasi-projective moduli spaces of $K$-general lattice polarized irreducible holomorphic symplectic manifolds. Moreover, we study their Baily--Borel compactification and investigate a relation between one-dimensional boundary components and ... More
Dynamics in the complex bidiscFeb 02 2004Jun 29 2004Let Delta^{n} be the unit polydisc in C^{n} and let f be a holomorphic self map of Delta^{n}. When n=1, it is well known, by Schwarz's lemma, that f has at most one fixed point in the unit disc. If no such point exists then f has a unique boundary point, ... More
Lectures on Deformation quantization of Poisson manifoldsJul 13 2012Jul 18 2012These notes are based on the course given at the School of Geometry, University Kasdi Merbah (Ouargla) 2012. The aim of the course was the deformation quantization of Poisson Lie groups. In these notes we only review Kontsevich's formality theorem.
Poisson ReductionJun 20 2011Oct 09 2013In this paper we develope a theory of reduction for classical systems with Poisson Lie groups symmetries using the notion of momentum map introduced by Lu. The local description of Poisson manifolds and Poisson Lie groups and the properties of Lu's momentum ... More
The role of galaxy formation in the structure and dynamics of dark matter halosFeb 19 2009The structure and dynamics of dark matter halos, as predicted by the hierarchical clustering scenario, are at odds with the properties inferred from the observations at galactic scales. My Thesis addresses this problem by taking an evolutionary approach. ... More
Conformal blocks attached to twisted groupsJul 14 2017The aim of this paper is to generalize the notion of conformal blocks to the situation in which the Lie algebra they are attached to is not defined over a field, but depends on covering data of curves. The result will be a sheaf of conformal blocks on ... More
Semiclassical limit to the Vlasov equation with inverse power law potentialsMar 14 2019We consider mixed quasi-free states describing $N$ fermions in the mean-field limit. In this regime, the time evolution is governed by the nonlinear Hartree equation. In the large $N$ limit, we study the convergence towards the classical Vlasov equation. ... More
Sequential order under CHJan 06 2010Revisiting and completing a work due to A. I. Ba\v{s}kirov, we construct compact sequential spaces of any sequential order up to and including $\omega_1$ as quotient spaces of $\beta\omega$ under CH.
A Bernoulli problem with non constant gradient boundary constraintSep 07 2010We present in this paper a result about existence and convexity of solutions to a free boundary problem of Bernoulli type, with non constant gradient boundary constraint depending on the outer unit normal. In particular we prove that, in the convex case, ... More
On the classical and quantum momentum mapMar 19 2012In this thesis we study the classical and quantum momentum maps and the theory of reduction. We focus on the notion of momentum map in Poisson geometry and we discuss the classification of the momentum map in this framework. Furthermore, we describe the ... More
Optimal estimation of multiple phasesApr 18 2003We study the issue of simultaneous estimation of several phase shifts induced by commuting operators on a quantum state. We derive the optimal positive operator-valued measure corresponding to the multiple-phase estimation. In particular, we discuss the ... More
On the analytical convergence of the QPA procedureJul 27 1998We present an analytical proof of the convergence of the ``quantum privacy amplification'' procedure proposed by D. Deutsch et al. [Phys. Rev. Lett. 77, 2818 (1996)]. The proof specifies the range of states which can be purified by this method.
A general approach to systems with randomly pinned particles: unfolding and clarifying the Random Pinning Glass TransitionNov 16 2012Pinning a fraction of particles from an equilibrium configuration in supercooled liquids has been recently proposed as a way to induce a new kind of glass transition, the Random Pinning Glass Transition (RPGT). The RPGT has been predicted to share some ... More
Reconciling dark matter and neutrino masses in mSUGRAMay 14 2009We study the minimal SUGRA phenomenology in the case of an alternative seesaw mechanism for generating neutrino masses. Changes in the neutrino sector lead to a modification of the supersymmetric particle spectrum and the sneutrino naturally arises as ... More
Sneutrino cold dark matter in extended MSSM modelsMay 14 2008A thorough analysis of sneutrinos as dark matter candidates is performed, in different classes of supersymmetric models, as is typically done for the neutralino dark matter. First in the Minimal Supersymmetric Standard Model, sneutrinos are marginally ... More
Constructor Theory of ThermodynamicsJul 21 2016May 27 2017All current formulations of thermodynamics invoke some form of coarse-graining or ensembles as the supposed link between their own laws and the microscopic laws of motion. They deal only with ensemble-averages, expectation values, macroscopic limits, ... More
Quantization of Poisson-Hamiltonian systemsFeb 26 2015In this paper we introduce the concept of Hamiltonian system in the canonical and Poisson settings. We will discuss the quantization of the Hamiltonian systems in the Poisson context, using formal deformation quantization and quantum group theories.
Chasing a consistent picture for dark matter direct searchesOct 15 2012Nov 29 2012In this paper we assess the present status of dark matter direct searches by means of Bayesian statistics. We consider three particle physics models for spin-independent dark matter interaction with nuclei: elastic, inelastic and isospin violating scattering. ... More
The metallicity bimodality of globular cluster systems: a test of galaxy assembly and of the evolution of the galaxy mass-metallicity relationNov 07 2012(Abridged) We build a theoretical model to study the origin of the globular cluster metallicity bimodality in the hierarchical galaxy assembly scenario, based on the observed galaxy mass-[O/H] relation and the galaxy stellar mass function up to z ~4, ... More
Mean-field evolution of fermions with singular interactionJan 09 2018We consider a system of N fermions in the mean-field regime interacting though an inverse power law potential $V(x)=1/|x|^{\alpha}$, for $\alpha\in(0,1]$. We prove the convergence of a solution of the many-body Schr\"{o}dinger equation to a solution of ... More
Busemann Functions and Julia-Wolff-Caratheodory Theorem for PolydiscsFeb 20 2007The classical Julia-Wolff-Caratheodory Theorem is one of the main tools to study the boundary behavior of holomorphic self-maps of the unit disc of $\C$. In this paper we prove a Julia-Wolff-Caratheodory's type theorem in the case of the polydisc of $\C^n.$ ... More
Bayes and present dark matter direct search statusOct 03 2011Recently there has been a huge activity in the dark matter direct detection field, with the report of an excess from CoGeNT and CRESST along with the annual modulated signal of DAMA/Libra and the strong exclusion bound from XENON100. We analyse these ... More
Bayesian analysis of multiple direct detection experimentsOct 21 2013Mar 04 2014Bayesian methods offer a coherent and efficient framework for implementing uncertainties into induction problems. In this article, we review how this approach applies to the analysis of dark matter direct detection experiments. In particular we discuss ... More
Constructor Theory of ThermodynamicsJul 21 2016Sep 04 2016The laws of thermodynamics, powerful for countless purposes, are not exact: both their phenomenological and their statistical-mechanical versions are valid only at 'macroscopic scales', which are never defined. Here I propose a new, exact and scale-independent ... More
Lattice polarized irreducible holomorphic symplectic manifoldsDec 11 2013We generalize Nikulin's and Dolgachev's lattice-theoretical mirror symmetry for K3 surfaces to lattice polarized higher dimensional irreducible holomorphic symplectic manifolds. In the case of fourfolds of $K3^{\left[2\right]}-$type we then describe mirror ... More
Inflationary magnetogenesis with added helicity: constraints from non-gaussianitiesJul 31 2017Jun 08 2018In previous work, two of us have proposed a model of inflationary magnetogenesis based on a rolling auxiliary field able both to account for the magnetic fields inferred by the (non) observation of gamma-rays from blazars, and to start the galactic dynamo, ... More
Understanding corrosion inhibition with van der Waals DFT methods: the case of benzotriazoleAug 05 2015The corrosion of materials is an undesirable and costly process affecting many areas of technology and everyday life. As such, considerable effort has gone into understanding and preventing it. Organic molecule based coatings can in certain circumstances ... More
Gravitational wave production: A strong constraint on primordial magnetic fieldsJun 13 2001Oct 01 2001We compute the gravity waves induced by anisotropic stresses of stochastic primordial magnetic fields. The nucleosynthesis bound on gravity waves is then used to derive a limit on the magnetic field amplitude as function of the spectral index. The obtained ... More
Adding helicity to inflationary magnetogenesisJul 10 2014Nov 19 2014The most studied mechanism of inflationary magnetogenesis relies on the time-dependence of the coefficient of the gauge kinetic term $F_{\mu\nu}\,{F}^{\mu\nu}$. Unfortunately, only extremely finely tuned versions of the model can consistently generate ... More
Fluctuations and Shape of Cooperative Rearranging Regions in Glass-Forming LiquidsNov 17 2014We develop a theory of amorphous interfaces in glass-forming liquids. We show that the statistical properties of these surfaces, which separate regions characterized by different amorphous arrangements of particles, coincide with the ones of domain walls ... More
A note on an overdetermined problem for the capacitary potentialJan 11 2016We consider an overdetermined problem arising in potential theory for the capacitary potential and we prove a radial symmetry result.
Inverse-Compton drag on a Highly Magnetized GRB jet in Stellar EnvelopeMar 19 2015Jan 11 2016The collimation and evolution of relativistic outflows in $\gamma$-ray bursts (GRBs) are determined by their interaction with the stellar envelope through which they travel before reaching the much larger distance where the energy is dissipated and $\gamma$-rays ... More
An adaptive sequential optimum design for model selection and parameter estimation in non-linear nested modelsJul 26 2011Dec 20 2011This paper has been withdrawn by the author because it has been substantially modified.
Complex dynamics in a nerve fiber model with periodic coefficientsAug 17 2007We deal with the periodic boundary value problem for a second-order nonlinear ODE which includes the case of the Nagumo type equation $v_{xx} - g v + n(x) F(v) = 0,$ previously considered by Grindrod and Sleeman and by Chen and Bell in the study of nerve ... More
Z production via Vector Boson Fusion at LHCJan 25 2010The production of Z bosons via Vector Boson Fusion at the LHC collider at 10 TeV centre-of-mass energy has been studied. The aim is to investigate the possibility to isolate a known Standard Model process to be used as reference for the measurement of ... More
Geometrical aspects of expansions in complex basesMay 22 2011We study the set of the representable numbers in base $q=pe^{i\frac{2\pi}{n}}$ with $\rho>1$ and $n\in \mathbb N$ and with digits in a arbitrary finite real alphabet $A$. We give a geometrical description of the convex hull of the representable numbers ... More
A simple proof of Kotake-Narasimhan theorem in some classes of ultradifferentiable functionsApr 13 2016We give a simple proof of a general theorem of Kotake-Narasimhan for elliptic operators in the setting of ultradifferentiable functions in the sense of Braun, Meise and Taylor. We follow the ideas of Komatsu. Based on an example of Metivier, we also show ... More
Rigidity of infinitesimal momentum mapsOct 20 2014Sep 11 2015In this paper we prove rigidity theorems for Poisson Lie group actions on Poisson manifolds. In particular, we prove that close infinitesimal momentum maps associated to Poisson Lie group actions are equivalent using a normal form theorem for SCI spaces. ... More
Stackable vs Autonomous Cars for Shared Mobility Systems: a Preliminary Performance EvaluationSep 27 2017Car sharing is one of the key elements of a Mobility-on-Demand system, but it still suffers from several shortcomings, the most significant of which is the fleet unbalance during the day. What is typically observed in car sharing systems, in fact, is ... More
Gravitational waves from stochastic relativistic sources: primordial turbulence and magnetic fieldsMar 17 2006Sep 15 2006The power spectrum of a homogeneous and isotropic stochastic variable, characterized by a finite correlation length, does in general not vanish on scales larger than the correlation scale. If the variable is a divergence free vector field, we demonstrate ... More
Theoretical investigation of two- and three-body short range correlations in inclusive electron scattering off nuclei at high momentum transferMar 12 2010The effects of short range correlations (SRC) in inclusive (A(e,e')X) and exclusive (A(e,e'N)X and A(e,e'2N)X) are reviewed. A new approach to the analysis of inclusive cross sections is illustrated, based upon the introduction of proper scaling functions ... More
Simulating the Bullet ClusterNov 06 2007We present high resolution N-body/SPH simulations of the interacting cluster 1E0657-56. The main and the sub-cluster are modeled using extended cuspy LCDM dark matter halos and isothermal beta-profiles for the collisional component. The hot gas is initially ... More
Minimum-weight codewords of the Hermitian codes are supported on complete intersectionsMay 25 2016Let $\mathcal{H}$ be the Hermitian curve defined over a finite field $\mathbb{F}_{q^2}$. Aim of the present paper is to complete the geometrical characterization of the supports of the minimum-weight codewords of the algebraic-geometry codes over H, started ... More
Random Pinning Glass Transition: Hallmarks, Mean-Field Theory and Renormalization Group AnalysisOct 31 2012We present a detailed analysis of glass transitions induced by pinning particles at random from an equilibrium configuration. We first develop a mean-field analysis based on the study of p-spin spherical disordered models and then obtain the three dimensional ... More
Fine-tuning in the rotation curves of spirals and the uniqueness of their mass modellingNov 25 2004We construct a generic mass model of a disk galaxy by combining the usual two mass components, an exponential thin stellar disk and a dark halo for which we alternatively assume one of the two most common mass distributions. We construct its generic rotation ... More
Spectral weight redistribution in strongly correlated bosons in optical latticesJan 30 2008We calculate the single-particle spectral function for the one-band Bose-Hubbard model within the random phase approximation (RPA). In the strongly correlated superfluid, in addition to the gapless phonon excitations, we find extra gapped modes which ... More
Distributed First Order LogicJul 28 2015Distributed First Order Logic (DFOL) is a formalism introduced more than 10 years ago with the purpose of formalising distributed knowledge-based systems. In these systems, knowledge is scattered in a set of heterogeneous and intercon- nected modules. ... More
Self-regulation promotes cooperation in social networksJul 20 2018Cooperative behavior in real social dilemmas is often perceived as a phenomenon emerging from norms and punishment. To overcome this paradigm, we highlight the interplay between the influence of social networks on individuals, and the activation of spontaneous ... More
Higher-order parabolic equations with VMO assumptions and general boundary conditions with variable leading coefficientsSep 11 2017Dec 14 2018We prove weighted mixed $L_{p}(L_{q})$-estimates, with $p,q\in(1,\infty)$, for higher-order elliptic and parabolic equations on the half space $\mathbb{R}^{d+1}_{+}$ and on domains with general boundary conditions which satisfy the Lopatinskii--Shapiro ... More
First Principle Computation of Random Pinning Glass Transition, Glass Cooperative Length-Scales and Numerical ComparisonsMar 27 2014Oct 12 2015As a guideline for experimental tests of the ideal glass transition (Random Pinning Glass Transition, RPGT) that shall be induced in a system by randomly pinning particles, we performed first-principle computations within the Hypernetted chain approximation ... More
Role of surface heterogeneous nucleation on nanoporous drug delivery systemsMar 26 2019In this work we investigate the use of nanoporous carrier as drug delivery systems for hydrophobic molecules. By studying a model system made of porous silicon loaded with beta-carotene, we unveil a fundamental limitation of these carriers that is due ... More
On the non-BPS first order flow in N=2 U(1)-gauged SupergravityNov 08 2012Apr 08 2013We consider theories of N=2 supergravity with Fayet-Iliopoulos gauging, and describe a procedure to obtain non-BPS extremal black hole solutions in asymptotically AdS_4 space, in a fully symplectic covariant framework. By considering both electric as ... More
Optimal cloning for two pairs of orthogonal statesOct 16 2001We study the optimal cloning transformation for two pairs of orthogonal states of two-dimensional quantum systems, and derive the corresponding optimal fidelities.
Non-commuting degrees of freedom in linear quantum gravityDec 17 2018We analyse our recently proposed experiment to witness indirectly non-commuting degrees of freedom in gravity, in the light of the analogy between the electromagnetic and the gravitational field. We thereby identify the non-commuting gravitational degrees ... More
Constructor Theory of InformationMay 21 2014Jul 14 2014We present a theory of information expressed solely in terms of which transformations of physical systems are possible and which are impossible - i.e. in constructor-theoretic terms. Although it includes conjectured laws of physics that are directly about ... More
Stochastic Duality and Orthogonal PolynomialsJan 31 2017For a series of Markov processes we prove stochastic duality relations with duality functions given by orthogonal polynomials. This means that expectations with respect to the original process (which evolves the variable of the orthogonal polynomial) ... More
A class of differential quadratic algebras and their symmetriesJan 09 2017May 08 2017We study a multi-parametric family of quadratic algebras in four generators, which includes coordinate algebras of noncommutative four-planes and, as quotient algebras, noncommutative three spheres. Particular subfamilies comprise Sklyanin algebras and ... More
Multiplicity of periodic solutions for differential equations arising in the study of a nerve fiber modelJul 03 2006We deal with the periodic boundary value problem for a second-order nonlinear ODE which includes the case of the Nagumo type equation $v_{xx} - g v + n(x) F(v) = 0,$ previously considered by Grindrod and Sleeman and by Chen and Bell in the study of the ... More
The projective model structure on contractionsMar 09 2017We prove that the projective model structure on the category of unbounded cochain complexes extends naturally to the category of contractions. The proof is completely elementary and we do not assume familiarity with model categories.
Uniqueness of the Momentum mapAug 07 2012Mar 25 2013We give a detailed discussion about existence and uniqueness of Lu's momentum map. More precisely, we introduce the infinitesimal momentum map, and we study its properties. This allows us to describe the theory of reconstruction of the momentum map from ... More
A sharp Rogers-Shephard type inequality for the p-difference body of a planar convex bodyFeb 05 2007We prove a sharp Rogers-Shephard type inequality for the p-difference body of a convex body in the two-dimensional case, for every p greater than or equal to one.
Evolution families and maximal regularity for systems of parabolic equationsOct 26 2015Jul 07 2016In this paper we prove maximal $L^p$-regularity for a system of parabolic PDEs, where the elliptic operator $A$ has coefficients which depend on time in a measurable way and are continuous in the space variable. The proof is based on operator-theoretic ... More
Higgs boson couplings: measurements and theoretical interpretationDec 01 2016This report will review the Higgs boson properties: the mass, the total width and the couplings to fermions and bosons. The measurements have been performed with the data collected in 2011 and 2012 at the LHC accelerator at CERN by the ATLAS and CMS experiments. ... More
Betti multiplets, flows across dimensions and c-extremizationOct 27 2016We consider 4d N=1 SCFTs, topologically twisted on compact constant curvature Riemann surfaces, giving rise to 2d N=(0,2) SCFTs. The exact R-current of these 2d SCFT extremizes the central charge c_{2d}, similarly to the 4d picture, where the exact R-current ... More
Subwavelength edge detection through trapped resonances in waveguidesJan 10 2015Lenses that can collect the perfect image of an object must restore propagative and evanescent waves. However, for efficient information transfer, e.g., in compressed sensing, it is often desirable to detect only the fast spatial variations of the wave ... More
Atomistic details of oxide surfaces and surface oxidation: the example of copper and its oxidesAug 05 2015The oxidation and corrosion of metals are fundamental problems in materials science and technology that have been studied using a large variety of experimental and computational techniques. Here we review some of the recent studies that have led to significant ... More
Limits on stochastic magnetic fields: A defense of our paper [1]Apr 25 2005In their recent paper ``Faraday rotation of the cosmic microwave background polarization by a stochastic magnetic field'', Kosowsky et al. Phys.Rev. D71, 043006 (2005) have commented about our paper [C.Caprini and R.Durrer, Phys. Rev. D65, 023517 (2002)], ... More
On the extraction of the probability of two- and three-nucleon short range correlations in nucleiDec 14 2011Recent experimental data on inclusive and exclusive lepton and hadron scattering off nuclei have renewed the interest in theoretical and experimental studies of Short Range Correlations (SRC), due to the relevant impact they may have not only on the structure ... More
Semilinear p-evolution equations in Sobolev spacesJul 31 2015Oct 25 2016We prove local in time well-posedness in Sobolev spaces of the Cauchy problem for semi-linear p-evolution equations of the first order with real principal part, but complex valued coefficients for the lower order terms, assuming decay conditions on the ... More
Patch-repetition correlation length in glassy systemsJan 10 2012We obtain the patch-repetition entropy Sigma within the Random First Order Transition theory (RFOT) and for the square plaquette system, a model related to the dynamical facilitation theory of glassy dynamics. We find that in both cases the entropy of ... More
Spontaneous energy-barrier formation in an entropy-driven glassy dynamicsOct 08 2014The description of activated relaxation of glassy systems in the multidimensional configurational space is a long-standing open problem. We develop a phenomenological description of the out-of-equilibrium dynamics of a model with a rough potential energy ... More
A novel method for evaluating the critical nucleus and the surface tension in systems with first order phase transitionJun 11 2007Jan 03 2008We introduce a novel method for calculating the size of the critical nucleus and the value of the surface tension in systems with first order phase transition. The method is based on classical nucleation theory, and it consists in studying the thermodynamics ... More
Black holes with halosDec 07 2016We present new AdS4 black hole solutions in N = 2 gauged supergravity coupled to vector and hypermultiplets. We focus on a particular consistent truncation of M-theory on the homogeneous Sasaki-Einstein seven-manifold M111, characterized by the presence ... More
Belle II prospects for CP-violation measurementsJul 10 2018The Belle II collaboration operates a substantially upgraded Belle detector at the SuperKEKB energy-asymmetric e+ e- collider. Belle II will start recording collisions at the Upsilon(4S) energy in 2018, aiming to collect by 2025 50 ab^{-1} of data, 50 ... More
Radiation Monitoring with Diamond Sensors for the Belle-II Vertex DetectorOct 30 2017The Belle II detector is currently under construction at the SuperKEKB electron-positron high-luminosity collider, that will provide an instantaneous luminosity 40 times higher than that of KEKB. There- fore the Belle-II VerteX Detector (VXD) will operate ... More
Semistability of certain bundles on a quintic Calabi-Yau threefoldSep 26 2005In the paper ``Chirality change in string theory'', by Douglas and Zhou, the authors give a list of bundles on a quintic Calabi-Yau threefold. Here we prove the semistability of most of these bundles. This provides examples of string theory compactifications ... More
Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravityJul 19 2017Dec 09 2017All existing quantum gravity proposals share the same deep problem. Their predictions are extremely hard to test in practice. Quantum effects in the gravitational field are exceptionally small, unlike those in the electromagnetic field. The fundamental ... More
When can gravity path-entangle two spatially superposed masses?Mar 24 2018An experimental test of quantum effects in gravity has recently been proposed, where the ability of the gravitational field to entangle two masses is used as a witness of its quantum nature. The key idea is that if gravity can generate entanglement between ... More
Energy-exchange stochastic models for non-equilibriumOct 14 2014Non-equilibrium steady states are subject to intense investigations but still poorly understood. For instance, the derivation of Fourier law in Hamiltonian systems is a problem that still poses several obstacles. In order to investigate non-equilibrium ... More
A changepoint approach for the identification of financial extreme regimesFeb 25 2019Inference over tails is usually performed by fitting an appropriate limiting distribution over observations that exceed a fixed threshold. However, the choice of such threshold is critical and can affect the inferential results. Extreme value mixture ... More
Contrast function estimation for the drift parameter of ergodic jump diffusion processJul 24 2018In this paper we consider an ergodic diffusion process with jumps whose drift coefficient depends on an unknown parameter $\theta$. We suppose that the process is discretely observed at the instants (t n i)i=0,...,n with $\Delta$n = sup i=0,...,n--1 (t ... More
Non-symplectic automorphisms of odd prime order on manifolds of $K3^{[n]}$-typeFeb 01 2018We classify non-symplectic automorphisms of odd prime order on irreducible holomorphic symplectic manifolds which are deformations of Hilbert schemes of any number n of points on K3 surfaces, extending results already known for n=2. In order to do so, ... More
Higher-order elliptic and parabolic equations with VMO assumptions and general boundary conditionsFeb 10 2017Dec 14 2018We prove mixed $L_{p}(L_{q})$-estimates, with $p,q\in(1,\infty)$, for higher-order elliptic and parabolic equations on the half space $\R^{d+1}_{+}$ with general boundary conditions which satisfy the Lopatinskii--Shapiro condition. We assume that the ... More
Black holes with halosDec 07 2016Jun 06 2017We present new AdS4 black hole solutions in N = 2 gauged supergravity coupled to vector and hypermultiplets. We focus on a particular consistent truncation of M-theory on the homogeneous Sasaki-Einstein seven-manifold M111, characterized by the presence ... More
A characterization of the wave front set defined by the iterates of an operator with constant coefficientsDec 16 2014We characterize the wave front set $WF^P_\ast(u)$ with respect to the iterates of a linear partial differential operator with constant coefficients of a classical distribution $u\in{\mathcal D}'(\Omega)$, $\Omega$ an open subset in ${\mathbb R}^n$. We ... More