A5065744927- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Noncommutative and Quantum Gravity Theories
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Quantum Mechanics and Applications
- Pulsars and Gravitational Waves Research
- Quantum Electrodynamics and Casimir Effect
- Quantum Computing Algorithms and Architecture
- Astrophysics and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Relativity and Gravitational Theory
- Gamma-ray bursts and supernovae
- Neural dynamics and brain function
- Advanced Materials and Mechanics
- Algebraic structures and combinatorial models
- Pickering emulsions and particle stabilization
- Quantum Information and Cryptography
- Advanced Topics in Algebra
- Advanced Thermodynamics and Statistical Mechanics
- Particle Detector Development and Performance
- Music Technology and Sound Studies
- Solar and Space Plasma Dynamics
- Atomic and Subatomic Physics Research
- Topological and Geometric Data Analysis
Fudan University
2016-2025
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2019-2025
Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
2022-2025
Istituto Nazionale di Fisica Nucleare
2023-2024
Centre National de la Recherche Scientifique
2022
Laboratoire AstroParticule et Cosmologie
2022
Université Paris Cité
2022
Gansu Great Wall Electrical and Electronics Engineering Research Institute
2021
State Key Laboratory of ASIC and System
2021
Shanghai Fudan Microelectronics (China)
2021
The exploration of the universe has recently entered a new era thanks to multi-messenger paradigm, characterized by continuous increase in quantity and quality experimental data that is obtained detection various cosmic messengers (photons, neutrinos, rays gravitational waves) from numerous origins. They give us information about their sources properties intergalactic medium. Moreover, astronomy opens up possibility search for phenomenological signatures quantum gravity. On one hand, most...
We show that the recent detection of a gravitational wave (GW) background reported by various pulsar timing array (PTA) collaborations including NANOGrav-15 yr, PPTA, EPTA/InPTA, and CPTA can be explained in terms first order phase transitions (FOPTs) from dark sector models (DSM). Specifically, we explore model for involves Majoron, Nambu-Goldstone boson is emerging spontaneous symmetry breaking $U(1{)}_{L}$ or $U(1{)}_{B\ensuremath{-}L}$ symmetry. how predicted GW power spectrum, with...
Abstract The unification of quantum mechanics and general relativity has long been elusive. Only recently have empirical predictions various possible theories gravity put to test, where a clear signal properties is still missing. dawn multi-messenger high-energy astrophysics tremendously beneficial, as it allows us study particles with much higher energies travelling longer distances than in terrestrial experiments, but more progress needed on several fronts. A thorough appraisal current...
Since the science white paper of Large High Altitude Air Shower Observatory (LHAASO) published on arXiv in 2019 [e-Print: 1905.02773 (astro-ph.HE)], LHAASO has completed transition from a project to an operational gamma-ray astronomical observatory is new generation multi-component facility located Daocheng, Sichuan province China, at altitude 4410 meters. It aims measuring with unprecedented sensitivity spectrum, composition, and anisotropy cosmic rays energy range between 10$^{12}$...
We investigate a (super-)renormalizable and ghost-free theory of gravity, showing that under natural (exponential) ansatz the form factor suitable truncation it can give rise to Starobinsky inflationary in cosmological frameworks, thus offering theoretical justification its origin. study corresponding evolution we examine generation curvature perturbations, adapting $f(R)$-like equations symmetry-reduced Friedmann-Lema\^{\i}tre-Robertson-Walker metric. Furthermore, analyze how ultraviolet...
In recent years, Planck-scale modifications of the dispersion relation have been attracting increasing interest also from viewpoint possible applications in astrophysics and cosmology, where spacetime curvature cannot be neglected. Nonetheless, interplay between effects is still poorly understood, particularly cases not constant. These challenges so far postponed by relying on an ansatz, first introduced Jacob Piran. We propose here a general strategy analysis Friedmann-Robertson-Walker...
We study the quantization of a linear scalar field, whose symmetries are described by $\ensuremath{\kappa}$-Poincar\'e Hopf algebra, via deformed Fock space construction. The one-particle sector theory exhibits natural (Planckian) cutoff for modes field. At ``multiparticle'' level nontrivial coalgebra structure leads to bosonization in construction states. These physical states carry energy-momentum charges which divergenceless and obey dispersion relation.
We review matter bounce scenarios where the content is dark and energy. These cosmologies predict a nearly scale-invariant power spectrum with slightly red tilt for scalar perturbations small tensor-to-scalar ratio. Importantly, these models positive running of index, contrary to predictions simplest inflationary ekpyrotic models, hence could potentially be falsified by future observations. also how bouncing cosmological space-times can arise in theories either Einstein equations are...
Living systems face both environmental complexity and limited access to free-energy resources. Survival under these conditions requires a control system that can activate, or deploy, available perception action resources in context specific way. In this Part I, we introduce the principle (FEP) idea of active inference as Bayesian prediction-error minimization, show how problem arises systems. We then review classical quantum formulations FEP, with former being limit latter. accompanying II,...
We suggest an appealing strategy to probe a large class of scenarios beyond the Standard Model simultaneously explaining recent CDF II measurement $W$ boson mass and predicting first-order phase transitions (FOPT) testable in future gravitational-wave (GW) experiments. Our analysis deploys measurements from GW channels high energy particle colliders. discuss this methodology focusing on specific example provided by extension physics that incorporates additional scalar $\mathrm{SU}(2)_{\rm...
Over these past few years several quantum-gravity research groups have been exploring the possibility that in some Planck-scale nonclassical descriptions of spacetime one or another form symmetries might arise. One most studied scenarios is based on use Hopf algebras, but previous attempts were not successful deriving constructively properties conserved charges would like to obtain from structure, and this turn did allow a crisp physical characterization new concept symmetry. Working within...
We present a new unification of the electroweak and gravitational interactions based on joining weak $SU(2)$ gauge fields with left-handed part space-time connection, into single field valued in complexification local Lorentz group. Hence, emerge as right-handed chiral half which explains chirality interaction. This is possible, because, shown by Plebanski, Ashtekar, others, other connection enough to code dynamics degrees freedom. achieved within an extension Plebanski action previously...
We present a model of inflation based on the interaction between homogeneous and isotropic configuration U (1) gauge field fermionic charge density J 0 .The regulated is generated from Bunch-Davies vacuum state using methods Koksma Prokopec [11], found to redshift as 1/a(η).The time-like component sourced by leading growth in A(η) ∼ a(η).As result dominated energy contained interaction, A , which remains constant during inflation.We also provide mechanism generate net lepton asymmetry.The...
Using self-dual Ashtekar variables, we investigate (at the effective level) spherically symmetry reduced model of loop quantum gravity, both in vacuum and when coupled to a scalar field. Within real Ashtekar-Barbero formulation, system field symmetric gravity is known possess non closed (quantum) algebra constraints once local (pointwise) holonomy corrections are introduced, which leads several obstructions quantization model. Moreover, case, while not anomalous, introduces modifications...
Future detectors can be used as gravitational microscopes to probe the horizon structure of merging black holes with waves. But, this microscope quantum regime? We study interesting question and find that (i) error in distance resolution is exponentially sensitive errors Love number, (ii) uncertainty principle gravity forces a fundamental limit, (iii) conclusions about spacetime at small distances rely on assumptions properties (unknown) compact objects considered.Received 24 October...
Any interaction between finite quantum systems in a separable joint state can be viewed as encoding classical information on an induced holographic screen. Here we show that when such is represented measurement, the reference frames (QRFs) deployed to identify and pick out their pointer states induce decoherence, breaking symmetry of observer-relative way. Observable entanglement, contextuality, memory are, this representation, logical temporal relations QRFs. Sharing entanglement resource...
We show in this pedagogical review that far from being an apparent law of physics stands by itself, the holographic principle is a straightforward consequence quantum information theory separable systems. It provides basis for theories measurement, time, and scattering. Utilizing notion screens, which are encoding boundaries between physical subsystems, we demonstrate interaction exchange during strictly conserved. Then use generalized order to flesh out fully-general measurement produces...
The unification of quantum mechanics and general relativity has long been elusive. Only recently have empirical predictions various possible theories gravity put to test. dawn multi-messenger high-energy astrophysics tremendously beneficial, as it allows us study particles with much higher energies travelling longer distances than in terrestrial experiments, but more progress is needed on several fronts. A thorough appraisal current strategies experimental frameworks, regarding...
Several recent studies have considered the implications for astrophysics and cosmology of some possible nonclassical properties spacetime at Planck scale. The new effects, such as a Planck-scale-modified energy-momentum (dispersion) relation, are often inferred from analysis quantum versions Minkowski spacetime, therefore relevant estimates depend heavily on assumption that there could not be significant interplay between Planck-scale curvature effects. We here scrutinize this assumption,...
Fundamental quantum gravity theories are known to be notoriously difficult extract viable testable predictions out of. In this paper, we aim incorporate putative corrections coming from loop in deriving modified dispersion relations for particles on a deformed Minkowski spacetime. We show how different choices of the Immirzi parameter can, some cases, serendipitously lead outcomes such modifications, depending quantization scheme chosen. This allows one differentiate between these via...
We investigate the production of primordial Gravitational Waves (GWs) arising from First Order Phase Transitions (FOPTs) associated to neutrino mass generation in context type-I and inverse seesaw schemes. examine both "high-scale" as well "low-scale" variants, with either explicit or spontaneously broken lepton number symmetry $U(1)_L$ sector. In latter case, a pseudo-Goldstone majoron-like boson may provide candidate for cosmological dark matter. find that schemes softly-broken single...
Abstract We introduce novel methods for implementing generic quantum information within a scale‐free architecture. For given observable system, we show how observational outcomes are taken to be finite bit strings induced by measurement operators derived from holographic screen bounding the system. In this framework, measurements of identified systems with respect defined reference frames represented semantically‐regulated flows through distributed sets binary‐valued Barwise‐Seligman...