A5050657023- Nuclear Materials and Properties
- Nuclear reactor physics and engineering
- Nuclear Physics and Applications
- Advanced Thermodynamics and Statistical Mechanics
- Micro and Nano Robotics
- Graphite, nuclear technology, radiation studies
- Nuclear and radioactivity studies
- Material Dynamics and Properties
- Fusion materials and technologies
- Theoretical and Computational Physics
- Complex Systems and Time Series Analysis
- Spectroscopy and Quantum Chemical Studies
- X-ray Diffraction in Crystallography
- Healthcare Policy and Management
- Quantum, superfluid, helium dynamics
- Thermodynamic and Structural Properties of Metals and Alloys
- Radioactive element chemistry and processing
- Spacecraft and Cryogenic Technologies
- Ion-surface interactions and analysis
- Thermodynamic properties of mixtures
- Ecosystem dynamics and resilience
- High-pressure geophysics and materials
- Diffusion and Search Dynamics
- Heat and Mass Transfer in Porous Media
- Powder Metallurgy Techniques and Materials
University of Chicago
2022-2025
University of Buenos Aires
2025
Enrico Fermi Center for Study and Research
2025
Fermi National Accelerator Laboratory
2022
Laboratoire Matière et Systèmes Complexes
2019-2021
Université Paris Cité
2018-2021
Centre National de la Recherche Scientifique
2018-2021
University of Cambridge
2018
Sorbonne Paris Cité
2018
Polytechnic University of Turin
2018
We study the statistical properties of active Ornstein-Uhlenbeck particles (AOUPs). In this simplest models, Gaussian white noise overdamped Brownian colloids is replaced by a colored noise. This suffices to grant system hallmark matter, while still allowing for analytical progress. in detail steady-state distribution AOUPs small persistence time limit and spatially varying activity. At collective level, we show experience motility-induced phase separation both presence pairwise forces or...
Combining model experiments and theory, we investigate the dense phases of polar active matter beyond conventional flocking picture. We show that above a critical density flocks assembled from self-propelled colloids arrest their collective motion, lose orientational order, form solids actively rearrange local structure while continuously melting freezing at boundaries. establish solidification is first-order dynamical transition: nucleate, grow, slowly coarsen until complete phase...
Abstract Spectroscopically pure copper and three dilute alloys containing approximately 0·05 atomic % of silver, cadmium beryllium respectively have been irradiated with 4 MeV electrons at -196°c then annealed temperatures up to + 50°c. The recovery the irradiation damage has observed by measuring changes in electrical resistance, measured liquid helium. annealing peeks -140°, -80° end 0°c spectroscopically copper. Similar peaks occur also alloys, but their exact form is significantly...
We study the statistical properties of a single free quantum particle evolving coherently on discrete lattice in $\mathit{\text{d}}$ spatial dimensions where every site is additionally subject to continuous measurement occupation number. Our numerical results indicate that system undergoes measurement-induced phase transition (MiPT) for $\mathit{\text{d}}>1$ from delocalized localized as strength $\ensuremath{\gamma}$ increased beyond critical value ${\ensuremath{\gamma}}_{c}$. In language...
Abstract This paper reports the design of a biosensor for sensitive, low-cost measurement lead in drinking water. The uses genetically-modified strain Escherichia coli , which serves as both signal amplifier and reporter water, measured via colour change. We developed PlomBOX platform to image this change we demonstrate its capability detect concentrations low World Health Organisation upper limit water 10 ppb. Our approach does not require expensive infrastructure or expert operators,...
Systems with nonreciprocal interactions generically display time-dependent states. These are routinely observed in finite systems, from neuroscience to active matter, which globally ordered oscillations exist. However, the stability of these uniform phases noisy spatially-extended their fate thermodynamic limit, and critical behavior corresponding phase transitions not fully understood. Here, we address questions by introducing a generalization Ising model study its means numerical...
Abstract The additional elastic scattering of monochromatic neutrons, wavelength 7·5 Å, produced by irradiating a sample AGXP graphite to dose 6 × 1019 fast neutrons/cm2 at 30°C has been measured as function the angle. If we make reasonable assumptions that equal concentrations vacancies and interstitials are present also scatter isotropically an estimate state agglomeration may be made, provided allowance is made for relaxation neighbouring atoms. result 4·2 per cluster; values interstitial...
We study the role of noise on nature transition to collective motion in dry active matter. Starting from field theories that predict a continuous at deterministic level, we show fluctuations induce density-dependent shift onset order, which turns changes into phase-separation scenario. Our results apply range systems, including topological models particles interact with fixed number nearest neighbors, were believed so far exhibit order. analytical predictions are confirmed by numerical...
By working in the small persistence time limit, we determine steady-state distribution of an Active Ornstein Uhlenbeck Particle (AOUP) experiencing, addition to self-propulsion, a Gaussian white noise modelling bath at temperature T. This allows us derive analytical formulas for three quantities: spatial density confined particle, current induced by asymmetric periodic potential and entropy production rate. These disentangle respective roles passive active noises on steady state AOUPs,...
Colloidal heat engines extract power out of a fluctuating bath by manipulating confined tracer. Considering self-propelled tracer surrounded passive colloids, we optimize the engine performances based on maximum available power. Our approach relies an adiabatic mean-field treatment particles which reduces many-body description into effective dynamics. It leads us to reveal that, when operated at constant activity, can only produce less than its counterpart. In contrast, output isothermal...
(1958). Measurements of unit cell and physical dimension changes molybdenum after neutron irradiation. The Philosophical Magazine: A Journal Theoretical Experimental Applied Physics: Vol. 3, No. 35, pp. 1329-1332.
We introduce and study a new model consisting of single classical random walker undergoing continuous monitoring at rate γ on discrete lattice. Although such measurement cannot affect physical observables, it has nontrivial effect the probability distribution walker. At small γ, we show analytically that time evolution latter can be mapped to stochastic heat equation. In this limit, width log-probability thus follows Family-Vicsek scaling law, N^{α}f(t/N^{α/β}), with roughness growth...
The nature of the transition to collective motion in assemblies aligning self-propelled particles remains a long-standing matter debate. In this article, we focus on dry active and show that weak fluctuations suffice generically turn second-order mean-field transitions into `discontinuous' coexistence scenario. Our theory shows how induce density-dependence polar-field mass, even when effect is absent at level. turn, dependency density triggers feedback loop between ordering advection...
Abstract Spectroscopically pure copper and a series of dilute binary allsoys copper, containing between 0.02 1 atomic % silver, cadmium beryllium respectively, have been neutron irradiated to doses about 5 × 1017 n.v.t. at −196°c. A isochronal anneals up + 150°c were performed the recovery radiation damage has observed by measuring changes electrical resistance in liquid helium. Three principal annealing peaks approximately −140°c, −60°c 0°c which are superposed upon continuous for all...