Special Issues

Universe runs special issues to create collections of papers on specific topics. The aim is to build a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors who are experts in the subject and oversee the editorial process for papers. Papers published in a Special Issue will be collected together on a dedicated page of the journal website. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Relativistic Heavy Ion Collision
edited by
submission deadline 10 Dec 2023 | 3 articles | Viewed by 2923 | Submission Open
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
The Physics of Time Travel
edited by , , and
submission deadline 15 Dec 2023 | 6 articles | Viewed by 6502 | Submission Open
Keywords: time travel; chronology protection; closed causal curves; causality; inconsistent histories; quantum signalling; quantum ontology; wormholes; warp drives; faster than light
(This special issue belongs to the Section Gravitation)
Quantum Entanglement and Holographic Universe
edited by
submission deadline 15 Dec 2023 | 1 articles | Viewed by 1336 | Submission Open
Keywords: quantum entanglement; general relativity; gauge/gravity duality; holographic universe; black holes; Hawking radiation; Page curve
(This special issue belongs to the Section Gravitation)
Studies in Neutron Stars submission deadline 15 Dec 2023 | 1 articles | Viewed by 1220 | Submission Open
Keywords: neutron star cooling; quark matter in neutron stars; bayesian analysis; binary neutron star mergers; hypernuclear matter; gravitational waves; NICER; strange dwarfs; mass twin stars; perturbative QCD
(This special issue belongs to the Section Compact Objects)
Recent Development and Prospects in Dark Matter Research submission deadline 15 Dec 2023 | 1 articles | Viewed by 1059 | Submission Open
(This special issue belongs to the Section Cosmology)
Ultra High Energy Photons submission deadline 31 Dec 2023 | 11 articles | Viewed by 16159 | Submission Open
Keywords: ultra-high energy photons; cosmic rays; cosmic ray ensembles   ; extensive air showers; multimessenger astroparticle physics
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Collectivity in High-Energy Proton-Proton and Heavy-Ion Collisions
edited by , and Kosim Olimov
submission deadline 31 Dec 2023 | 11 articles | Viewed by 10501 | Submission Open
Keywords: Collective flow; Chemical and kinetic freeze-out of particles; System equilibration and thermalization; Strangeness enhancement; Production and suppression of heavy resonances; Jet production and quenching; QGP formation and evolution; Non-extensive statistical (Tsallis) distributions; High-energy proton– proton and heavy-ion collisions
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Quantum Theory and Beyond submission deadline 31 Dec 2023 | 9 articles | Viewed by 8674 | Submission Open
(This special issue belongs to the Section Field Theory)
Elementary Particles in Astrophysics and Cosmology submission deadline 31 Dec 2023 | 6 articles | Viewed by 7062 | Submission Open
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Recent Advances in Double Beta Decay Investigations: In Honor of Prof. Sabin Stoica at His 70th Anniversary submission deadline 31 Dec 2023 | 5 articles | Viewed by 3962 | Submission Open
Keywords: neutrino physics; double beta decays; nuclear structure; weak interaction; beta decays
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Recent Progress in Hadron Spectroscopy
edited by and Zhi Yang
submission deadline 31 Dec 2023 | 3 articles | Viewed by 2324 | Submission Open
Keywords: exotic states and candidates; meson spectroscopy; baryon spectroscopy; hadron structure; hadron decay and production; hadron– hadron interactions
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
A New Horizon of Pulsar and Neutron Star: The 55-Year Anniversary submission deadline 31 Dec 2023 | 2 articles | Viewed by 1112 | Submission Open
Keywords: pulsar; neutron star; magnetar; X-ray binary; compact object; gravitational wave
(This special issue belongs to the Section Compact Objects)
High Energy Emission from Clusters, Groups, and Filaments: Current Observations and Future Prospects
edited by
submission deadline 31 Dec 2023 | Viewed by 419 | Submission Open
Keywords: clusters of galaxies; X-ray emission; superclusters; filaments; non-thermal emission; structure formation; future missions; intracluster medium; X-ray cavities; cluster atmosphere
(This special issue belongs to the Section Galaxies and Clusters)
Multiparticle Dynamics
edited by , and Tamás Novák
submission deadline 31 Dec 2023 | Viewed by 411 | Submission Open
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Pulsar Astronomy
edited by and
submission deadline 31 Dec 2023 | Viewed by 359 | Submission Open
Keywords: neutron stars; strange stars; radio pulsars; X-ray pulsars; gamma-ray pulsars; magnetars; millisecond pulsars; binary neutron stars; gravitational wave
(This special issue belongs to the Section Compact Objects)
Cosmic Rays and Dark Matter Detection
edited by , and Sami Caroff
submission deadline 31 Dec 2023 | Viewed by 303 | Submission Open
Keywords: cosmic ray; dark matter; photons; neutrino; axion; black hole; WIMP; astroparticle; solar modulation; Cerenkov detectors
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Exploring Quark Matter under Extreme Scenarios of Temperature and Density
edited by Souvik Priyam Adhya, Sandeep Chatterjee and Sreemoyee Sarkar
submission deadline 31 Dec 2023 | Viewed by 212 | Submission Open
Keywords: heavy ion collisions; quark– gluon plasma; hard probes; collective dynamics; saturation; neutron star mergers; equation of state; transport coefficients; electromagnetic probes; chirality; small systems
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
The Large-Scale Structure of the Universe: Theory and Observation
edited by
submission deadline 31 Dec 2023 | Viewed by 174 | Submission Open
Keywords: cosmology; large-structure of the universe; galaxy clusters; cosmic voids; cosmic web; gravitational instability; gravity theories; cosmological parameters; dark matter; dark energy; redshift surveys; gravitational lensing; numerical cosmology; statistical learning; theory; observation
(This special issue belongs to the Section Cosmology)
Quantum Field Theory of Open Systems
edited by and
submission deadline 15 Jan 2024 | 3 articles | Viewed by 5120 | Submission Open
Keywords: open quantum system; dissipation; decoherence; relaxation; renormalization
(This special issue belongs to the Section Field Theory)
Origin of the Flavor Structure in the Standard Model and Beyond
edited by
submission deadline 15 Jan 2024 | 2 articles | Viewed by 1978 | Submission Open
Keywords: origin of the flavor structure; flavor symmetry; GUT prediction; baryon asymmetry
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
The Friedmann Cosmology: A Century Later submission deadline 31 Jan 2024 | 5 articles | Viewed by 3678 | Submission Open
Keywords: Alexander Friedmann; expanding universe; cosmological singularity; inflation; hot universe; astrophysics of expanding universe; accelerated expansion; dark matter; dark energy
(This special issue belongs to the Section Cosmology)
Advances in Star Formation in the Milky Way
edited by and Guangxing Li
submission deadline 31 Jan 2024 | 1 articles | Viewed by 1113 | Submission Open
Keywords: molecular clouds; massive star formation; star cluster formation; initial mass function; interstellar turbulence; interstellar magnetic fields; protostars; young stellar objects; jets and outflows; circumstellar disks  
(This special issue belongs to the Section Stellar Astronomy)
Neutrinos across Different Energy Scales submission deadline 31 Jan 2024 | 1 articles | Viewed by 1001 | Submission Open
Keywords: astroparticle physics; neutrino physics; primordial Universe; relic neutrinos; supernova neutrinos; solar neutrinos; atmospheric neutrinos; high-energy neutrinos; physics beyond the Standard Model
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Recent Outcomes and Future Challenges in Nuclear Astrophysics
edited by , and Eliana Masha
submission deadline 31 Jan 2024 | Viewed by 247 | Submission Open
Keywords: nuclear astrophysics; astroparticle physics; experimental techniques; BBN; stellar evolution; stellar explosion; observational astronomy
(This special issue belongs to the Section Stellar Astronomy)
Universe: Feature Papers 2023 – Field Theory
edited by
submission deadline 29 Feb 2024 | 4 articles | Viewed by 2782 | Submission Open
(This special issue belongs to the Section Field Theory)
Recent Advances in Quantum Cosmology
edited by
submission deadline 29 Feb 2024 | 2 articles | Viewed by 2431 | Submission Open
Keywords: Big-Bounce scenarios; time in quantum cosmology; symmetries of the quantum universe; canonical quantum cosmology; covariant approaches to quantum cosmology; quantum cosmology from extended gravity
(This special issue belongs to the Section Cosmology)
CP Violation and Flavor Physics submission deadline 29 Feb 2024 | 1 articles | Viewed by 918 | Submission Open
Keywords: CP violation; flavor physics; flavor puzzle; strong CP problem; flavor symmetries; spontaneous CP violation; baryogenesis; leptogenesis
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Weak Gravitational Lensing: Recent Progress and Future Goals
edited by
submission deadline 29 Feb 2024 | Viewed by 348 | Submission Open
Keywords: weak gravitational lensing; cosmic shear; galaxy-galaxy lensing; magnification; shear measurement; redshift calibration; intrinsic alignment; baryonic feedback
(This special issue belongs to the Section Cosmology)
The Nature of Dark Energy
edited by Alexander Bonilla and
submission deadline 29 Feb 2024 | Viewed by 221 | Submission Open
Keywords: modified gravity; dark energy parameterizations; holographic models and emergent gravity; inhomogeneous and anisotropic models; injection of energy in the early universe; dark bosons; dark radiation and dark matter models; machine learning and inference methods; new observational facilities
(This special issue belongs to the Section Cosmology)
Blazar Bursts: Theory and Observation
edited by Yunguo Jiang
submission deadline 29 Feb 2024 | Viewed by 53 | Submission Open
Keywords: active galactic nuclei; blazars; supermassive black holes; flat-spectrum radio quasars; individual BL Lacertae objects; observational astronomy; radiation mechanisms: general; polarization
(This special issue belongs to the Section Compact Objects)
Quantum Field Theory in Curved Spacetime and Its Implications for Cosmology, Blackholes and Quantum Gravity submission deadline 10 Mar 2024 | 5 articles | Viewed by 4107 | Submission Open
Keywords: quantum field theory in curved spacetime; quantum gravity; blackholes; cosmology
(This special issue belongs to the Section Foundations of Quantum Mechanics and Quantum Gravity)
Dark Energy and Dark Matter
edited by Yan Gong
submission deadline 10 Mar 2024 | Viewed by 180 | Submission Open
Keywords: dark energy; dark matter; modified gravity; theoretical model; cosmic acceleration; cosmic large-scale structure; gravitational lensing; galaxy clustering; intensity mapping; cosmological constraint
(This special issue belongs to the Section Cosmology)
Newest Results in Gravitational Waves and Machine Learning
edited by , and Zhixiang Ren
submission deadline 15 Mar 2024 | 1 articles | Viewed by 1016 | Submission Open
Keywords: gravitational wave; artificial intelligence; machine learning; coalescence of binary compact objects; supernova; glitch classification; Einstein equation; numerical relativity; quantum gravity
(This special issue belongs to the Section Gravitation)
The Quantum Chromodynamics: 50th Anniversary of the Discovery
edited by Tianbo Liu
submission deadline 31 Mar 2024 | 3 articles | Viewed by 4439 | Submission Open
Keywords: parton distribution; fragmentation function; nucleon spin; exotic states; jets; electron-ion collider; QCD factorization; nonperturbative method
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Advances and Limitations of Modified Gravity submission deadline 31 Mar 2024 | 1 articles | Viewed by 1040 | Submission Open
(This special issue belongs to the Section Gravitation)
Quantum Gravity: Latest Advances and Prospects
edited by Angel Rincon and Benjamin Koch
submission deadline 31 Mar 2024 | Viewed by 154 | Submission Open
(This special issue belongs to the Section Gravitation)
Quantum Field Theory, 2nd Edition
edited by
submission deadline 31 Mar 2024 | Viewed by 124 | Submission Open
Keywords: ultralight axions; Peccei– Quinn at finite temperature; spectral densities; mixing of Yang– Mills theories; electroweak symmetry breaking; coarse-graining of Euclidean field theory gradient flow cooling
(This special issue belongs to the Section Foundations of Quantum Mechanics and Quantum Gravity)
Planetary Radar Astronomy
edited by and Yan Su
submission deadline 31 Mar 2024 | Viewed by 102 | Submission Open
Keywords: radar astronomy; lunar and planetary science; lunar and planetary radar detection; lunar and deep space exploration; radar observations of planets within the solar system; radar observations of planets and stars outside the solar system; Chang’ e-3/-4/-5; Tianwen-1 mission and perseverance rover mission
Ultra-High-Energy Cosmic Rays
edited by Haoning He
submission deadline 31 Mar 2024 | Viewed by 63 | Submission Open
Keywords: ultra-high-energy cosmic rays; particle acceleration; hadronic interactions; anisotropy; composition; multi-messenger astronomy; magnetic fields; Gamma-Ray Bursts (GRBs); galaxy clusters; Active Galactic Nuclei (AGN); Tidal Disruption Events (TDEs); radio galaxies; starburst galaxies; pulsars
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Exploring the Universe with 3G Gravitational Wave Observatories
edited by Luca Naticchioni
submission deadline 31 Mar 2024 | Viewed by 59 | Submission Open
(This special issue belongs to the Section Gravitation)
Developments and Technology Trends in the Space-Borne Instrumentation
edited by and
submission deadline 30 Apr 2024 | 4 articles | Viewed by 5455 | Submission Open
Keywords: in situ chemical analysis; planetary surface; planetary atmosphere; elemental (isotope) composition; isotope fractionation; organic and bioorganic compounds; capillary electrophoresis; gas/liquid chromatography; laser mass spectrometry (LIMS); LIBS; Raman spectroscopy; orbitrap; laser desorption; chemical surface imaging techniques; biosensors
(This special issue belongs to the Section Space Science)
Space Missions to Small Bodies: Results and Future Activities
edited by
submission deadline 30 Apr 2024 | 4 articles | Viewed by 3708 | Submission Open
Keywords: small bodies; planetary science; sample return; comets; asteroids; satellites
(This special issue belongs to the Section Planetary Sciences)
Universe: Feature Papers 2023—High Energy Nuclear and Particle Physics
edited by and Wolfgang Schafer
submission deadline 30 Apr 2024 | 1 articles | Viewed by 920 | Submission Open
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
Probing the Standard Model of Cosmology with Model-Independent Methods
edited by , Carlos Bengaly and Purba Mukherjee
submission deadline 30 Apr 2024 | 1 articles | Viewed by 744 | Submission Open
(This special issue belongs to the Section Cosmology)
New Insights in Fast Radio Bursts
edited by
submission deadline 30 Apr 2024 | Viewed by 304 | Submission Open
Keywords: fast radio bursts; repeating and periodic FRBs; new facilities; novel methods; localisation; FRBs and ISM and IGM; FRBs and cosmology; FRBs and magnetars
(This special issue belongs to the Section Space Science)
Heavy Flavor Physics and Perturbative Quantum Chromodynamics Calculation
edited by Ruilin Zhu and Long-Bin Chen
submission deadline 30 Apr 2024 | Viewed by 157 | Submission Open
Keywords: perturbative QCD; heavy flavor physics; effective theory; higher-order calculation; QCD factorization
(This special issue belongs to the Section High Energy Nuclear and Particle Physics)
A Multiwavelength View of Supernovae
edited by
submission deadline 30 Apr 2024 | Viewed by 48 | Submission Open
Keywords: supernovae; core collapse; type Ia; binaries; evolution; circumstellar interactions; emission processes; thermal and non-thermal emission
(This special issue belongs to the Section Stellar Astronomy)
Probing the Early Universe
edited by
submission deadline 30 May 2024 | Viewed by 21 | Submission Open
Keywords: the Planck era (t < 10-43  s); grand unification era (t < 10-36  s); the inflationary era (t < 10-33  s); electroweak epoch (10-33  s < t < 10-12  s); quark era (10-12  s < t < 10-5  s); hadron era (10-5  s < t < 1 s); lepton era with neutrino decoupling (1 s < t < 10 s); cosmic nucleosynthesis (10 s < t < 1000 s); radiation dominated and ‘ foggy’ era (1000 s < t < 380; 000 years); recombination (18; 000 years < t < 380; 000 years); the dark era (380; 000 years < t < 150 million years); first stars and galaxies (200 to 400 million years); cosmic reionization (200 million to 1 billion years)
(This special issue belongs to the Section Cosmology)
Solar and Stellar Activity: Exploring the Cosmic Nexus
edited by Emese Forgacs-Dajka and Zsofia Bebesi
submission deadline 31 May 2024 | Viewed by 73 | Submission Open
Keywords: astrophysical HD/MHD; solar and stellar activity; space weather; solar and stellar dynamo
(This special issue belongs to the Section Space Science)
Stellar Multi-Band Observational Studies in the Era of Big Data
edited by
submission deadline 30 Jun 2024 | 3 articles | Viewed by 3454 | Submission Open
Keywords: variable star; eclipsing binary; photospheric starspot; chromospheric activity; corona; flare; radio; X-ray; big data; statistic
(This special issue belongs to the Section Stellar Astronomy)
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