A5004851596- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Noncommutative and Quantum Gravity Theories
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Quantum Mechanics and Applications
- Neutrino Physics Research
- Quantum Chromodynamics and Particle Interactions
- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Quantum chaos and dynamical systems
- Astrophysics and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Topological Materials and Phenomena
- Quantum and Classical Electrodynamics
- Chaos-based Image/Signal Encryption
- Quantum Electrodynamics and Casimir Effect
- Relativity and Gravitational Theory
- Geophysics and Gravity Measurements
- Computational Physics and Python Applications
- Quantum many-body systems
- Advanced Differential Geometry Research
- Quantum Mechanics and Non-Hermitian Physics
- Advanced X-ray Imaging Techniques
Sichuan University
2018-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2019-2024
Istituto Nazionale di Fisica Nucleare
2019-2023
Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
2020-2022
University of L'Aquila
2014-2018
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2015-2017
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...
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$^{12}$...
The violation of Baryon Number, $\mathcal{B}$, is an essential ingredient for the preferential creation matter over antimatter needed to account observed baryon asymmetry in universe. However, such a process has yet be experimentally observed. HIBEAM/NNBAR %experiment program proposed two-stage experiment at European Spallation Source (ESS) search number violation. will include high-sensitivity searches processes that violate by one or two units: free neutron-antineutron oscillation...
Abstract The modified supergravity approach is applied to describe a formation of Primordial Black Holes (PBHs) after Starobinsky inflation. Our naturally leads the two-(scalar)-field attractor-type double inflation, whose first stage driven by scalaron and second another scalar field which belongs multiplet. potential kinetic terms are derived, vacua studied, inflationary dynamics those two scalars investigated. We numerically compute power spectra we find ultra-slow-roll regime leading an...
We discuss the emergence of black hole shadow and photon-sphere in context $f(R)$ gravity. It is shown that exponentially sensitive to linear instabilities metric coming from some solutions. Thus, photon circular trajectories, delimiting photon-sphere, are double exponentialized. Specifically we individuate two Lyapunov exponents, rather than only one, related different sources chaos geodesic orbits as a sort butterfly effect. Such result violates bound proposed by Maldacena, Shenker...
We propose a novel model of the modified (Starobinsky-like) old-minimal-type supergravity coupled to chiral matter superfield, that can {\it simultaneously} describe multi-field inflation, primordial black hole (PBH) formation, dark (DM), and spontaneous supersymmetry (SUSY) breaking after inflation in Minkowski vacuum. The PBH masses our double slow-roll with short phase "ultra-slow-roll" between two phases, are close $10^{18}$ g. find significant fraction allowed mass window be...
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...
We explore the Gravitational Waves (GW) phenomenology of a simple class supergravity models that can explain and unify inflation Primordial Black Holes (PBH) as Dark Matter (DM). Our (modified) naturally lead to two-field attractor-type double inflation, whose first stage is driven by Starobinsky scalaron second another scalar belonging multiplet. The PBHs formation in our efficient, compatible with all observational constraints, predicts stochastic GW background. compute PBH-induced power...
Pauli exclusion principle (PEP) violations induced by space-time noncommutativity, a class of universality for several models quantum gravity, are investigated the VIP-2 Lead experiment at Gran Sasso underground National Laboratory INFN. The experimental bound on noncommutative scale $\mathrm{\ensuremath{\Lambda}}$ excludes $\ensuremath{\theta}$-Poincar\'e far above Planck non anishing ``electriclike'' components ${\ensuremath{\theta}}_{\ensuremath{\mu}\ensuremath{\nu}}$, and up to...
Abstract We formulate a version of the low-scale Majoron model equipped with an inverse seesaw mechanism featuring lepton-number preserving dimension-6 operators in scalar potential. Contrary to its dimension-4 counterpart, we find that can simultaneously provide light and ultralight Majorons, neutrino masses their mixing, while strong first-order cosmological phase transitions associated spontaneous breaking lepton number electroweak symmetries early Universe. show by detailed numerical...
We show that a generalized version of the holographic principle can be derived from Hamiltonian description information flow within quantum system maintains separable state. then this entails general gauge invariance. When is realized in an ambient Lorentzian space-time, invariance under Poincaré group immediately achieved. apply pathway to retrieve action gravity. The latter cast à la Wilczek through similar formulation by MacDowell and Mansouri, which involves representation theory Lie...
Investigations of possible violations the Pauli exclusion principle represent critical tests microscopic space-time structure and properties. Space-time noncommutativity provides a class universality for several quantum gravity models. In this context VIP-2 lead experiment sets strongest bounds, searching violating atomic transitions in lead, excluding θ-Poincaré noncommutative models far above Planck scale nonvanishing θ_{μν} electriclike components, up to 6.9×10^{-2} scales if θ_{0i}=0.
We revisit possible glimpses of black-hole formation by looking at ultra-planckian string-string collisions very high final-state multiplicity. compare, in particular, previous results using the optical theorem, resummation ladder diagrams arbitrary loop order, and AGK cutting rules, with more recent study 2 → N scattering ∼ sM − ≫ 1. argue that some apparent tension between two approaches disappears once a reinterpretation latter's terms suitably defined infrared-safe cross sections is...
We show how exotic stringy instantons can generate an effective interaction between color diquark sextets in a Pati-Salam model, inducing Majorana mass term for the neutron. In particular, we discuss simple quiver theory like as example which calculations of instanton effects are and controllable. some different possibilities order to $$ n-\overline{n} oscillations testable next generation experiments, matrices neutrini Post-Sphaleron Baryogenesis scenario. Connections with Dark Matter...
We show that the recent detection of a gravitational wave (GW) background reported by various pulsar timing array (PTA) collaborations including NANOGrav-15yr, PPTA, EPTA, 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 $U(1)_{B-L}$ symmetry. how predicted GW power spectrum, with realistic choice FOPT...
We explore the possibility of detecting resonant conversions high frequency gravitational waves to radio-signals. show how graviton-photon transitions, from Gertsenshtein effect, can be resonantly amplified in a cosmological stochastic magnetic background. In particular, we found parametric resonances for both monochromatic and scale invariant power spectrum models field fluctuations. Our results substantially departs those predicted resonance-less domain-like large region oscillation...
The realization of a nonlocal quantum field theory without losing unitarity, gauge invariance and causality is investigated. It commonly retained that such formulation possible at tree level, but level acausality expected to reappear one loop. We suggest the problem is, in broad sense, similar about anomalies theory. By virtue this analogy, we acausal diagrams resulting from fermionic sector bosonic might cancel each other, with suitable content fields symmetries. As simple example, show how...
We discuss a new mechanism in which non-perturbative quantum gravity effects directly generate Majorana mass for the neutron. In particular, string theory, exotic instantons can an effective six quark operator by calculable mixed disk amplitudes. low scale scenario, with MS≃10÷105 TeV, neutron–antineutron oscillation be reached next generation of experiments. argue that protons and neutralinos are not destabilized dangerous FCNCs generated. show example quiver theories, locally free tadpoles...
We discuss the possibility that a Born–Infeld condensate coupled to neutrinos can generate both neutrino masses and an effective cosmological constant. In particular, field theory is provided capable of dynamically realizing superfluid phase firstly suggested by Ginzburg Zharkov. such case, acquire mass gap inside ether forming long-range Cooper pair. Phenomenological implications approach are also discussed.
We suggest that classicalization can cure non-local quantum field theories from acausal divergences in scattering amplitudes, restoring unitarity and causality. In particular, "trans-non-local" limit, the formation of non-perturbative classical configurations, called {\it classicalons}, scatterings like $\phi\phi\rightarrow \phi\phi$, avoid typical divergences.
The wealth of theoretical and phenomenological information about Quantum Chromodynamics at short long distances collected so far in major collider measurements has profound implications cosmology. We provide a brief discussion on the strongly coupled dynamics quarks gluons as well effects due to their collective motion physics early universe astrophysics.