Disciplines / Research questions
Physics
691 research topics · 2739 questions
One-Dimensional Configuration Sums and Conformal Characters4 questions
Energy-preserving bijection between RSOS paths and transfer-matrix string patterns in the physical combinatorics of critical RSOS and XXX models
Classification of modular partial Nahm sums: Nahm's problem for lattice-coset restrictions
Proof of the finitized bosonic character conjecture for the one-dimensional configuration sums of fused RSOS models
Native finitization of Bressoud -restricted paths for parafermionic characters: a canonical length assignment
The Difficult Problem of the Origin of Large Amounts of Nuclei in the Interstellar Medium of the Milky Way3 questions
The Galactic 26Al problem: systematics of the 1.809 MeV inference chain and the origin of the solar nebula's 26Al
Open for about 20 yearsCan the N(O,)Al fusion channel in explosive oxygen burning of supernovae account for the Galactic Al inventory?
Open for about 20 yearsConstraining the and stellar destruction rates at explosive-burning temperatures (–)
Open for about 40 years
Gravitational Wave Detection8 questions
Operational significance assignment for continuous gravitational-wave detections from known pulsars: signal-agnostic sky-bin excision, extreme-tail inference, and cross-pipeline validation of the sky-shifting method
Open for about 5 yearsMapping KAGRA+ upgrade-design choices to detection capability across gravitational-wave source classes: low-frequency sensitivity, event-rate uncertainty, waveform systematics, and core-collapse-supernova modeling limits
Open for about 6 yearsGravitational-wave burst detection of unknown morphology in pulsar timing array data under timing-model degeneracy and correlated noise
Open for about 16 yearsModel-based cross-correlation search for gravitational waves from Scorpius X-1: separating intrinsic amplitude from unknown spin inclination, and bounding the coherence time under spin wandering
Open for about 11 yearsRigorous per-band population-average upper limits in all-sky continuous gravitational-wave searches
Open for about 7 yearsPredictive sensitivity modeling and follow-up uncertainty in deep hierarchical all-sky searches for continuous gravitational waves
Open for about 3 yearsEstablishing scientifically credible detection capability for high-frequency (MHz-GHz) gravitational waves
Open for about 5 yearsReliable equation-of-state constraints from binary-neutron-star post-merger gravitational waves: out-of-sample model systematics, training-data limits, and exotic-matter robustness
Open for about 6 years
Is Eternal Inflation Possible?8 questions
Is there any coherent measure for eternal inflation?
Open for about 14 yearsControlled stochastic eternal inflation versus the refined swampland de Sitter conjecture: is the exclusion robust?
Open for about 7 yearsThe holographic measure on the exit from eternal inflation: establishing the smooth-exit conjecture beyond toy models and extending it to realistic decelerating cosmologies
Open for about 9 yearsEternal inflation in swampy landscapes: quantitative transition rates, the flyover mechanism, and a measure for the domain-wall multiverse
Open for about 7 yearsInitial-condition dependence and rigorous eternality criteria for hilltop eternal inflation
Open for about 10 yearsA UV-complete, swampland-compatible multiverse: eternal inflation, realistic tunneling rates, and the minimum inflationary duration in an actual landscape
Open for about 2 yearsMicrophysical realization of the breathing comoving Hubble multi-inflation scenario under the trans-Planckian censorship conjecture
Open for about 6 yearsIncidence of eternal inflation at small field scales and in multifield random-potential landscapes
Open for about 4 years
Realizing Quantum Mass Standards Using the "Watt Balance" Method3 questions
Reducing the combined measurement uncertainty of the BIPM Kibble balance realization of the kilogram: parasitic motion, electrical, alignment, and magnet-drift limitations
Open for about 6 yearsMaintaining consensus for the redefined kilogram: reconciling discrepant independent realizations for consistent mass dissemination
Open for about 7 yearsSuppressing alignment-related type-B uncertainties in the KRISS Kibble balance to reach a -level realization of the kilogram
Open for about 6 years
Simulating Superconductors with Ultracold Atomic Gases7 questions
Induced interactions and pairing in multi-component optical-lattice Fermi gases beyond weak-coupling mean field
Open for about 17 yearsEffective extended-Hubbard description and scale-up of exact configuration-interaction benchmarks for ultracold fermions in optical plaquettes
Open for about 9 yearsControlled phase diagram and critical behavior of the collision-induced pair-hopping Bose-Hubbard model for bosonic atoms in state-dependent optical lattices
Open for about 19 yearsBeyond-mean-field stability and dissipative regime of cavity-induced finite-momentum (FFLO-like) pairing in ultracold lattice Fermi gases
Open for about 6 yearsFinite-temperature superconducting transition of the two-dimensional mixed-dimensional bilayer t–J model: BKT critical temperature and pairing signatures with interlayer density coupling
Open for about 5 yearsPhonon-mediated Cooper pairing of light atoms in the large-scattering-length optical-lattice electron-phonon simulator
Open for about 12 yearsIntermediate-coupling phase diagram of the two-dimensional extended Hubbard-Holstein model: preformed pairs, BKT condensation, and pseudogap signatures at λ ≈ 1 and ℏω_ph ≈ t
Open for about 5 years
Establishing the Basic Units of the International System of Units (SI) Using Fundamental Physical Constants5 questions
Physical origin of the mode-dependent inconsistencies in cylindrical acoustic gas thermometry: even–odd dependence, nonlinear gas–shell coupling, and negative excess half-widths
Open for about 15 yearsHow many dimensional units does a quantum-gravity spacetime grant? The quantum-gravitational generalization of the minimal-standards count of fundamental constants
Open for about 2 yearsOrigins of the input-data inconsistencies that force uncertainty expansion in the CODATA fundamental-constants adjustment: the fine-structure constant, the Newtonian constant of gravitation, and hydrogen/deuterium spectroscopy
Open for about 2 yearsLinking the atomic and macroscopic mass scales in the post-2019 SI: atom-counting realization of the kilogram at competitive uncertainty
Open for about 7 yearsClosing the quantum metrology triangle at the level: cryogenic-capacitor frequency dispersion versus direct single-electron current architectures
Open for about 41 years
Five Challenges in Applying Statistical Physics Methods to Constraint Satisfaction Problems3 questions
Reconstruction versus mixing for Glauber dynamics on sparse random graphs
Open for about 16 yearsExtremal Bethe-state decomposition of the Gibbs measure of general random constraint satisfaction problems
Open for about 16 yearsDembo–Montanari-precision finite-size scaling for the -core of sparse random graphs beyond the settled 2-core
Open for about 19 years
Studying Hadron Physics and Strongly Coupled Quark Matter Using the AdS/CFT Duality Method9 questions
Simultaneous holographic description of pion static observables and the spacelike pion electromagnetic form factor in bottom-up AdS/QCD with chiral symmetry breaking
Open for about 19 yearsHolographic transport coefficients of dense QCD matter in paired, magnetized, and confined phases
Open for about 4 yearsBackreaction, color superconductivity, and the fate of the quarkyonic phase in the holographic QCD phase diagram
Open for about 5 yearsLocalized D5-brane baryons and astrophysically viable parameter regions in the holographic D3/D7 quark-star model
Open for less than 1 yearConsistent scalar-meson and axial-vector sectors in holographic QCD for the hadronic light-by-light contribution to the muon
Open for about 3 yearsTransport coefficients of strongly coupled dense quark matter with pairing, realistic flavor structure, and unquenched flavor backreaction
Open for about 6 yearsNon-perturbative running of multi-quark operator dimensions in holographic QCD and the robustness of the sexaquark mass prediction
Open for about 3 yearsCompleting the multi-phase holographic description of dense QCD matter for neutron stars: transport coefficients for confined and paired phases, finite-temperature merger inputs, and the holography-versus-pQCD contrast at intermediate densities
Open for about 4 yearsQuantitative weak equilibration rates for strongly coupled cold quark matter: quark masses, pairing, and model dependence
Open for about 2 years
A Question Related to Scanning Tunneling Microscopy (STM)6 questions
Quantitative STM tunneling-current prediction in the trapezoidal-barrier planar model: self-consistent image potential, low-bias accuracy, elevated-temperature emission, tip-shape corrections, and experimental validation
Open for about 4 yearsGeneral, robust, and physically interpretable deep-reinforcement-learning control of scanning-tunneling-microscope atom manipulation
Open for about 3 yearsFullerene-based tunneling probe of inter-valley coherence in moiré heterostructures: quantitative evaluation and experimental realization
Open for about 2 yearsTesting the double-quantum-dot mechanism for spin resonance in STM current noise: second Larmor and difference-frequency resonances, the tip spin, and the absolute noise power
Open for about 7 yearsValidity domain and k-space inversion of simultaneous I(V) and dI(V)/dz scanning tunneling spectroscopy
Open for about 8 yearsMicroscopic origin and channel decomposition of the element-specific tunneling-current modulation in synchrotron-radiation scanning tunneling microscopy
Open for about 18 years
Lasers with and without population inversion5 questions
Population inversion versus coherence in N2+ air lasing: discriminating emission mechanisms and building a predictive model for polarization-modulated strong-field pumping
Open for about 12 yearsExperimental realization and robustness of lasing without population inversion in an Er3+-doped YAG crystal
Open for about 14 yearsNonlinear steady state and realizability of lasing with and without inversion in an optically thin gain medium near a metal surface
Open for about 4 yearsDemonstrating amplification and lasing without inversion at 253.7 nm in mercury vapor (Doppler-free four-level double-dark-state scheme)
Open for about 26 yearsMechanism of gain and population inversion on the transition of in air lasing
Open for about 14 years
Finite Bond Dimension Truncation4 questions
Rigorous criteria for operator-entanglement boundedness and truncation-error control in Heisenberg-picture DMRG simulation of one-dimensional quantum dynamics
Rigorous compression theory and memory bounds for influence matrices of chaotic quantum many-body dynamics
A comprehensive theory of finite-bond-dimension effects in matrix product state approximations beyond the conformal-field-theory scaling picture
Predictive theory of finite-bond-dimension errors in the tensor renormalization group: convergence rates, effective correlation length, and spurious fixed points for universal critical data
Finite-Size Ground State Energy4 questions
Finite-size effects and root structure of the inhomogeneous Bethe ansatz equations for the half-filled Hubbard chain with nonparallel boundary magnetic fields
Finite-size energy of a one-dimensional Fermi gas beyond non-negative potentials: bound states and the zero-energy-resonance regime
Finite-size scaling theory for boundary renormalization-group flows in gapless one-dimensional quantum systems
Systematic analytic finite-size corrections for the periodic spin-1/2 isotropic antiferromagnetic Heisenberg chain: convergent Bethe-ansatz rapidity asymptotics, higher-order RG energy series, and excited states
Finite-Size Spectra and Continuum Limit2 questions
Analytic control of the non-compact continuum limit of two coupled Potts models (the model in regime III): logarithmic finite-size amplitudes, density of states, energy exponents, and the underlying conformal field theory
Open for about 12 yearsContinuum-limit identification of the staggered six-vertex model with integrable open boundaries: Euclidean or Lorentzian black-hole sigma model, and the emergence of the non-compact direction
Open for about 5 years
Finite-Size Corrections2 questions
Finite Entanglement Scaling4 questions
Extending the iPEPS Disorder-Parameter Framework and Its Finite Correlation Length Scaling to Continuous, Higher-Form, and Subsystem Symmetries
Completing the self-congruent-point effective field theory for finite-entanglement scaling in critical matrix product states
Origin and universality of the finite correlation length in variationally optimized Lorentz-invariant gapless iPEPS
Rigorous derivation of the finite-bond-dimension scaling of the correlation length in tensor network renormalization
Symmetry Restoration in Mean-Field Approximations of Finite Quantum Many-Body Systems8 questions
Finite-temperature variation after particle-number projection in nuclear mean-field theory: a tractable projected entropy and free energy in the paired phase
Open for about 21 yearsGenerality and measurability of extensive two-mode quantum discord in pair-correlated finite fermion systems
Open for about 12 yearsExtending angular-momentum-projected Nilsson mean-field plus exactly solvable pairing: isovector proton-neutron pairing, the validity boundary of the K=0 truncation, effective charges, and heavier nuclei
Open for about 10 yearsVariation after multi-symmetry projection: restoring angular momentum and parity inside the variational process, with isospin as the envisioned completion, using general Bogoliubov states and chiral three-nucleon interactions
Open for about 5 yearsWell-defined particle-number projection and configuration mixing for nuclear energy density functionals: contour-independent multi-reference energies free of pole and branch-cut pathologies
Open for about 19 yearsSymmetry restoration within the many-body-basis mean-field formulation of the Hubbard model: formulation, exact-diagonalization benchmark, and cost assessment
Open for about 3 yearsLipkin-method variation-after-projection for rotational and isospin symmetry restoration in nuclear energy-density-functional theory: quantitative assessment, kernel singularities, and range of applicability
Open for about 17 yearsGeneralizing the fermionic quantum-ring benchmark of symmetry breaking and restoration: U(1) gauge symmetry with particle-number projection, higher-dimensional spherium and glomium, and evaluation with dynamically correlated interactions
Open for about 2 years
Finite-Temperature Free Energy2 questions
Rigorous completion of the quantum transfer matrix approach to the thermodynamics of the spin- XXZ chain: all-temperature solvability of the non-linear integral equations and full classification of the subdominant spectrum
Finite-temperature thermodynamics and finite-size structure of the one-dimensional Hubbard model with nonparallel boundary magnetic fields
Cosmic Standard Ruler——Baryon Acoustic Oscillations7 questions
Establishing the galaxy density–ellipticity (GI) baryon acoustic oscillation channel as a validated percent-level standard ruler
Open for about 3 yearsAre new pre-recombination physics or calibrator systematics behind the short sound horizon inferred from late-time distance indicators?
Open for about 7 yearsThe nonlinear BAO peak shift in the Lyman-alpha forest: sign, magnitude, and robustness to IGM modeling
Open for about 2 yearsRobust sound-horizon-free measurement of from galaxy clustering at future-survey precision: validity of the rescaling methodology, the role of equality-scale information, and the power to constrain early-Universe solutions of the Hubble tension
Open for about 6 yearsOrigin of the DESI low-redshift baryon acoustic oscillation distance offsets: statistical fluctuation, unmodelled systematics, or new physics
Open for about 2 yearsCatalogue-level validation of the BAO sound-horizon estimator–integral mismatch and its corrections at Stage-IV survey precision
Open for about 11 yearsModel-minimal calibration of the low-redshift Universe: model-independent curvature, absolute BAO ruler scale, and redshift-stability of the standard ruler
Open for about 11 years
Cosmic Magnetic Fields8 questions
Spatial distribution of quark-hadron-fluctuation primordial magnetic bubbles at low redshift and their ultra-high-energy cosmic-ray consequences
Open for about 19 yearsCompleting the backreaction analysis of inflationary magnetogenesis: the self-consistent anisotropic phase, its primordial spectra, and strong-coupling viability in the Kanno–Soda–Watanabe scenario
Open for about 17 yearsRobust detection and environmental separation of cosmic-web magnetic fields via Faraday rotation
Open for about 7 yearsCan magnetic fields in cosmic-void interiors be established as observable relics of the primordial seed field?
Open for about 16 yearsOrigin of cosmic-web magnetism: discriminating primordial versus astrophysical magnetogenesis through joint radio observations and simulations
Open for about 32 yearsViability of a quasi-homogeneous cosmological seed field for the galactic mean-field dynamo
Open for about 14 yearsCan purely astrophysical magnetogenesis magnetize the volume-filling intergalactic medium, or is a primordial seed required?
Open for about 24 yearsQuantitative closure of the electroweak-magnetogenesis hypothesis for cosmic-void magnetic fields
Open for about 11 years
First Generation Stars in the Universe8 questions
Existence and detectability of low-mass metal-free (Population III) stars surviving in the Milky Way today
Open for about 45 yearsPhysical mass loss from Population III stars during quasi-static evolution: mechanisms, thresholds, and integrated amounts, and their consequences for pre-supernova masses and final fates
Open for about 16 yearsRobust determination of the Population III initial mass function from extremely metal-poor star abundances under supernova explodability filtering
Open for about 1 yearTrans-iron nucleosynthesis in zero-metallicity rotating massive stars: primary neutron sources, the seed-absence limit, and yield scaling with mass, rotation, mergers, and explosion physics
Open for about 17 yearsSurviving low-mass metal-free Population III stars: discovery or exclusion, and the low-mass end of the first-star initial mass function
Open for about 45 yearsWhen did Population III star formation end? The persistence of metal-free star formation into the reionization era and its observability
Open for about 20 yearsThe missing pair-instability supernova chemical imprint in extremely metal-poor stars: explaining its absence and constraining the Population III initial mass function
Open for about 24 yearsThe origin of the most iron-deficient stars: surface-polluted Population III survivors or second-generation stars, and the search for pristine survivors
Open for about 23 years
Afterglow of Cosmic Gamma-Ray Bursts6 questions
The physical nature of EP241107a and gamma-ray-quiet Einstein Probe fast X-ray transients: afterglow absorption physics, absent prompt emission, and the faint-GRB-channel question
Open for less than 1 yearPhysical origin of pre-prompt afterglow onset in gamma-ray-burst X-ray plateaus: a central-engine and ejecta model for the –– scalings, or a quantitative refutation of the prior-activity interpretation
Open for about 20 yearsRecovering unmodelled physical emission components in Gaussian-process-marginalized gamma-ray burst afterglow inference
Open for about 6 yearsAfterglow polarimetry as a quantitative probe of non-axisymmetric gamma-ray burst jets: deformed visible regions, magnetic-field coherence, and multi-wavelength disentanglement
Open for about 1 yearThe physical origin of the late-time very-high-energy emission component in gamma-ray burst afterglows
Open for about 6 yearsLate-Time X-Ray Excess, Jet-Structure Degeneracy, and Reverse-Shock Systematics in the Structured Forward–Reverse-Shock Afterglow of GRB 170817A/GW170817
Open for about 5 years
Evolution of Cosmic Strings7 questions
Scaling of string networks with baryon-vertex junctions at large and in the local dual flux-tube theory
Open for less than 1 yearCompleting the varying-tension growth mechanism for cosmic strings: loop production, percolation into networks, multi-modulus dynamics, and field-theoretic strings
Open for about 2 yearsMicrophysical determination of the inputs to the kinematically constrained multi-tension cosmic-superstring network model
Open for about 16 yearsAsymptotic scaling of multi-tension cosmic string networks with bound states: unequal tensions, bound-state abundance, and semi-analytic calibration
Open for about 18 yearsLoop decay in Abelian-Higgs cosmic string networks: the instability exciting internal modes, the Nambu-Goto-like loop fraction, and field-theory-based observational forecasts
Open for about 5 yearsQuantitative calibration and validation of the charge-velocity-dependent one-scale (CVOS) model for current-carrying cosmic string networks
Open for about 5 yearsValidated dynamics of cosmic string networks with time-varying tension: calibrating the generalized VOS model, the momentum parameter k(v), and the post-percolation fate
Open for about 1 year
Are strangelets present in cosmic rays?8 questions
Definite prediction of the galactic strangelet flux: from strange-star-merger multifragmentation spectra to observable cosmic-ray fluxes
Open for about 11 yearsTesting the strangelet hypothesis for the cosmic-ray knee: is the primary flux between the knee and the ankle dominated by non-nuclear strange-quark-matter particles, and what is the true rigidity scale of the nuclear cutoffs?
Open for about 30 yearsStrangelet interpretation of the 1–100 PeV cosmic-ray knee anomalies: microscopic interaction theory, strange-quark-star source physics, and observational confirmation
Open for about 46 yearsPredictive modeling of a geomagnetically trapped strangelet population (the strangelet belt)
Open for about 19 yearsTesting the strangelet-based model of the cosmic-ray spectrum: the strangelet component of the primary cosmic-ray flux above
Open for about 29 yearsQuantitative test of the strangelet hypothesis for the cosmic-ray knee and its anomalous effects at 1–100 PeV
Open for about 4 yearsSurface tension of the quark-matter/vacuum interface and the fragmentation of strange-star surfaces into strangelet crusts
Open for about 21 yearsCosmic-ray strangelets from HESS J1731-347: theory of 2SC–CFL strangelet production, multi-TeV Monte Carlo detectability, and gamma-ray line constraints with the Cherenkov Telescope Array
Open for about 1 year
The golden age of cosmology4 questions
Origin of the DAMA/LIBRA annual-modulation signal: identify the dark-matter scenario, or the systematic effect, responsible for the long-standing NaI(Tl) modulation
Open for about 28 yearsIdentifying the inflationary realization: primordial tensor confirmation, the fourth Hubble-flow function, and the reheating kinematics ()
Open for about 16 yearsCoherent quantum geometry origin of the cosmological constant: nonperturbative computation of the QCD causal-diamond correlator and the identification
Open for about 6 yearsRoot cause of the distance-ladder versus sound-horizon-free H0 discrepancy: coherent systematic, late-time departure from ΛCDM, or hybrid
Open for about 2 years
Gravitational waves of cosmological origin5 questions
Primordial gravitational-wave signatures of the NEC-violating DHOST bounce and validation of its analytic tensor-transfer results
Open for about 5 yearsRobust prediction of the cosmic-string stochastic gravitational-wave background: loop-distribution and metastable-decay model dependence in the mapping from string tension to Ω_GW(f)
Open for about 37 yearsMapping the chiral-invariant-mass dependence of gravitational-wave spectra from first-order QCD phase transitions in the parity doublet model and breaking the order-parameter degeneracy
Open for less than 1 yearFirst-principles gravitational-wave spectrum of a hot plasma at intermediate momenta between the hydrodynamic and particle regimes
Open for about 11 yearsIdentifying the physical origin of the nanohertz stochastic gravitational-wave background in pulsar timing arrays
Open for about 6 years
Early universe QCD phase transition processes6 questions
Cosmological viability of the high-baryon-density first-order QCD phase transition: color-superconducting and magnetic-field corrections, primordial quark nugget survival, and nanohertz gravitational waves
Open for about 1 yearPercent-level imprint of the cosmic QCD transition on the primordial gravitational-wave spectrum: from lattice-QCD thermodynamics to uncertainty-controlled predictions of
Open for about 7 yearsFirst-order pion condensation at the QCD epoch: tricritical behavior at high isospin chemical potential and the primordial gravitational-wave imprint
Open for about 1 yearOrder of the QCD transition at large baryochemical potential and metastable supercooling of the early universe
Open for about 51 yearsSix-light-flavor first-order QCD confinement transition and its primordial-black-hole yield for the LIGO/Virgo mass scale
Open for about 7 yearsGravitational waves from turbulence at the cosmological QCD crossover: multi-dimensional dynamics, viscosity, and initial conditions
Open for about 13 years
Neutrinos in the universe7 questions
Disentangling neutrino nonradiative decay from astrophysical and flavor-physics uncertainties in the diffuse supernova neutrino background
Open for about 23 yearsMaking tritium-capture detection of the cosmic neutrino background decisive: breaking the rate-degeneracy mechanisms
Open for about 12 yearsCosmological determination of the absolute neutrino mass scale and the mass ordering
Open for about 54 yearsPhysical identification of the diffuse astrophysical neutrino flux: which source populations (especially the gamma-opaque component below ~100 TeV), spectral form, and prompt atmospheric background produce the IceCube all-flavor sky
Open for about 12 yearsLocal number density and momentum distribution of the cosmic neutrino background at the Solar System
Open for about 23 yearsRadiative decay of the cosmic neutrino background: detecting or constraining it through the cosmic infrared background spectrum
Open for about 27 yearsOrigins of the high-energy astrophysical neutrino flux and the behavior of the spectrum above 1 PeV
Open for about 12 years
Experimental observation of correlation dynamics inside atoms and molecules2 questions
Experimental realization of the double-attosecond-pulse measurement of the electron-electron correlation time in helium double ionization
Open for about 19 yearsQuantitative many-body theory of doubly-excited-state-mediated nonsequential above-threshold double ionization in strontium
Open for less than 1 year
Nuclear drip lines and the updated chart of nuclides4 questions
Rigorous uncertainty quantification for ab initio predictions of the limits of nuclear existence
Open for about 7 yearsGrowth of the Coulomb-induced enhancement of nuclear deformation and outward shift of the neutron drip line in heavy nuclei (Z > 60)
Open for about 1 yearLocation of the neutron drip line in the calcium isotope chain
Open for about 14 yearsPrincipled quantified extrapolation of the nuclear landscape to the particle drip lines
Open for about 6 years
Cluster structure and cluster radioactivity of atomic nuclei5 questions
Microscopic determination of the cluster preformation probability and surface-polarization parameter for exotic cluster radioactivity in trans-lead nuclei
Open for about 3 yearsThermal dissolution of cluster structures in finite nuclei: collective degrees of freedom and quantum fluctuations
Open for about 4 yearsFour-particle correlator test of alpha-cluster formation and of the mean-field clustering criteria in nuclei
Open for about 3 yearsMicroscopic foundation of the cluster preformation probability in trans-lead cluster radioactivity: absolute magnitude, scaling, and the origin of the / linearity
Open for about 37 yearsCluster emission from neutron-rich heavy nuclei: reliable decay rates and their impact on r-process nucleosynthesis
Open for less than 1 year
Halo phenomena in atomic nuclei2 questions
Locating the sodium neutron dripline and validating the deformed-halo structure of Na: shape-decoupling observables, three-body dynamics, and finite-range pairing in the DRHBc framework
Open for about 3 yearsUnsettled structure of the dripline two-neutron halo nuclei: binding energies, orbital content, and radii of 22C and 19B, with extension to the heaviest case 29F
Open for about 5 years
Three-body model of atomic nuclei4 questions
Consistent determination of chiral three-nucleon-force contact strengths: complete N3LO dynamics, simultaneous continuum and bound-state constraints, and consequences for nuclear structure
Open for about 15 yearsExistence and Efimov character of the predicted shallow excited state of N in the N++ three-body system
Open for about 11 yearsUncertainty-quantified embedding of the three-body model into reaction theory: direct comparison with measured interaction cross sections and the conflicting matter-radius extractions
Open for less than 1 yearTwo-proton halo nuclei as three-body systems in halo effective field theory: existence and spectrum of an effective three-body bound state under Coulomb repulsion
Open for about 11 years
Do atomic nuclei exhibit chirality?7 questions
Unambiguous identification and characterization of chiral doublet bands in triaxial nuclei: distinguishing static chirality, chiral vibration, and non-chiral alternatives
Open for about 20 yearsNuclear chirality in Pr: surviving chiral geometry and the decisive observables for chiral-band assignments
Open for about 29 yearsRobustness of nuclear chirality: why near-perfect chiral degeneracy in Tl is rare and how lifetime data can establish it elsewhere
Open for about 10 yearsFrom dynamic to static nuclear chirality: the microscopic conditions for genuine spontaneous breaking of handedness in triaxial nuclei
Open for about 29 yearsEstablishing nuclear chirality: chiral-basis selection rules, multiple chiral doublets, and the unobserved textbook chiral doublet band
Open for about 29 yearsReliable identification of chiral doublet bands in real nuclei: disentangling the chirality fingerprints and establishing model-independent criteria
Open for about 16 yearsMicroscopic description of chirality onset across the cesium isotope chain and the boundaries of the A≈130 chiral island: pairing, chiral dynamics, and edge cases at 119Cs, 133Cs, and 134Cs
Open for about 3 years
Microscopic mechanisms of nuclear shape transitions4 questions
Completing the validation and microscopic foundation of the empirical signatures for shape coexistence and shape/phase transitions in even-even nuclei
Open for about 3 yearsMicroscopic origin of the first-order shape/phase transitions at N = 40, 60, and 90 and the quantitative link between self-consistent and collective-model potentials
Open for about 2 yearsRobustness of microscopically inferred nuclear shape-phase-transition boundaries under complete beyond-mean-field treatment
Open for about 10 yearsControlled many-body truncation in the ab initio IM-GCM description of shape coexistence and the island of inversion: multireference three-body correlations and cranked configurations
Open for about 1 year
Relativistic symmetry in atomic nuclei—physical origin of spin and pseudospin symmetry5 questions
Quantitative link between the in-medium scalar-vector balance and pseudospin symmetry restoration in relativistic nuclear functionals
Open for about 7 yearsRegularized pseudo-spin-orbit splitting measure and validity of the constant-Σ approximation for pseudospin symmetry in bound and resonant nuclear states
Open for about 2 yearsHigher-order similarity-renormalization-group and effective-mass corrections to pseudospin symmetry breaking, and the origin of its better conservation than spin symmetry in nuclei
Open for about 13 yearsQuantitative mechanism of pseudospin-symmetry breaking and accidental restoration in relativistic mean-field nuclei: second-order systematics and predictions for neutron-skin and bubble nuclei
Open for about 1 yearCriteria for the origin and quality of pseudospin symmetry in nuclear Dirac mean fields
Open for about 14 years