Neutron Matter from Low to High Density

Abstract

Neutron matter is an intriguing nuclear system with multiple connections to other areas of physics. Considerable progress has been made over the last two decades in exploring the properties of pure neutron fluids. Here we begin by reviewing work done to explore the behavior of very low density neutron matter, which forms a strongly paired superfluid and is thus similar to cold Fermi atoms, though at energy scales differing by many orders of magnitude. We then increase the density, discussing work that ties the study of neutron matter with the determination of the properties of neutron-rich nuclei and neutron-star crusts. After this, we review the impact neutron matter at even higher densities has on the mass-radius relation of neutron stars, thereby making contact with astrophysical observations.

30 pages, 11 figures; prepared for Annual Review of Nuclear and Particle Science

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Cited by in corpus (109)

• Equations of state for supernovae and compact stars
• From hadrons to quarks in neutron stars: a review
• Constraining the speed of sound inside neutron stars with chiral effective field theory interactions and observations
• Quantum Simulation for High Energy Physics
• A critical examination of constraints on the equation of state of dense matter obtained from GW170817
• Symmetry Parameter Constraints From A Lower Bound On The Neutron-Matter Energy
• Chiral Three-Nucleon Interactions in Light Nuclei, Neutron-$\alpha$ Scattering, and Neutron Matter
• Results of the ASY-EOS experiment at GSI: The symmetry energy at suprasaturation density
• Constraining the Mass and Radius of Neutron Stars in Globular Clusters
• Dense Nuclear Matter Equation of State from Heavy-Ion Collisions
• Superfluidity in nuclear systems and neutron stars
• Extracting Nuclear Symmetry Energies at High Densities from Observations of Neutron Stars and Gravitational Waves
• Nuclear and neutron-star matter from local chiral interactions
• Confronting gravitational-wave observations with modern nuclear physics constraints
• Vortex pinning and dynamics in the neutron star crust
• Towards grounding nuclear physics in QCD
• Is a Trineutron Resonance Lower in Energy than a Tetraneutron Resonance?
• Probing the neutron skin with ultrarelativistic isobaric collisions
• A Minimal Nuclear Energy Density Functional
• Nuclear Equation of state for Compact Stars and Supernovae
• Constraints on the Symmetry Energy from PREX-II in the Multimessenger Era
• Imposing multi-physics constraints at different densities on the Neutron Star Equation of State
• Nuclear matter properties from local chiral interactions with $\Delta$ isobar intermediate states
• Multi-physics constraints at different densities to probe nuclear symmetry energy in hyperonic neutron stars
• New Ideas in Constraining Nuclear Forces
• Probing the equation of state of neutron star matter with gravitational waves from binary inspirals in light of GW170817: a brief review
• Superfluid Fermi atomic gas as a quantum simulator for the study of neutron-star equation of state
• Decay and recurrence of non-Gaussian correlations in a quantum many-body system
• Constraining the neutron-matter equation of state with gravitational waves
• Static Response of Neutron Matter
• The quest for light multineutron systems
• Diffusion Monte Carlo study of strongly interacting two-dimensional Fermi gases
• Constraining Superfluidity in Dense Matter from the Cooling of Isolated Neutron Stars
• From the microscopic to the macroscopic world: from nucleons to neutron stars
• The nuclear symmetry energy from neutron skins and pure neutron matter in a Bayesian framework
• Neutron stars and the dense matter equation of state: from microscopic theory to macroscopic observations
• Higgs-confinement phase transitions with fundamental representation matter
• The contact in the unitary Fermi gas across the superfluid phase transition
• Jacobi no-core shell model for $p$-shell hypernuclei
• Influence of density dependence of symmetry energy in hot and dense matter for supernova simulations
• Ab initio and phenomenological studies of the static response of neutron matter
• Spontaneous scalarization with an extremely massive field and heavy neutron stars
• The ${}^1$S${}_0$ pairing gap in neutron matter
• Glassy quantum nuclear pasta in neutron star crusts
• Prior probability distributions of neutron star crust models
• Non-perturbative Extraction of the Effective Mass in Neutron Matter
• Di-neutrons in neutron matter within Brueckner-Hartree-Fock approach
• From resonantly interacting fermions with effective range to neutron matter
• Hot and Dense Homogeneous Nucleonic Matter Constrained by Observations, Experiment, and Theory
• The pseudogap regime in the unitary Fermi gas
• A Lee-Yang--inspired functional with a density--dependent neutron-neutron scattering length
• Cold Atom Quantum Simulator for Dilute Neutron Matter
• Cooling of neutron stars in "nuclear medium cooling scenario" with stiff equation of state including hyperons
• From bare interactions, low--energy constants and unitary gas to nuclear density functionals without free parameters: application to neutron matter
• Nuclear energy density functionals grounded in ab initio calculations
• Dilute Fermi gas at fourth order in effective field theory
• Superfluid Phase Transitions and Effects of Thermal Pairing Fluctuations in Asymmetric Nuclear Matter
• Quantum Monte Carlo calculations of two neutrons in finite volume
• Clustering of Four-Component Unitary Fermions
• The Role of Baryon Structure in Neutron Stars
• Phenomenological QCD equations of state for neutron stars
• Entrainment effects in neutron-proton mixtures within the nuclear-energy density functional theory. I. Low-temperature limit
• Microscopic Study of ${}^1{S}_0$ Superfluidity in Dilute Neutron Matter
• Different faces of confinement
• Effective field theory for dilute Fermi systems at fourth order
• Equation of State of Neutron Stars with Junction Conditions in the Starobinsky Model
• Static response, collective frequencies and ground state thermodynamical properties of spin saturated two-component cold atoms and neutron matter
• Diagrammatic ab initio methods for infinite nuclear matter with modern chiral interactions
• Neural Wave Functions for Superfluids
• Unitary $p$-wave Fermi gas in one dimension
• Probing mixed-spin pairing in heavy nuclei
• Many-body approximations to the superfluid gap and critical temperature in pure neutron matter
• Effects of pairing gap and band gap on superfluid density in the inner crust of neutron stars
• Polytropic fits of modern and unified equations of state
• Toward a systematic strategy for defining power counting in the construction of the energy density functional theory
• Role of the effective range in the density-induced BEC-BCS crossover
• Theory of strongly paired fermions with arbitrary short-range interactions
• The interplay of single-particle and collective motions in the low-lying states of ${}_{\Lambda }^{21}$Ne with quadrupole-octupole correlations
• Machine-learning approach to finite-size effects in systems with strongly interacting fermions
• From odd-even staggering to the pairing gap in neutron matter
• Relativistic self-energy decomposition of nuclear symmetry energy and equation of state of neutron matter within QCD sum rules
• Satisfying the compressibility sum rule in neutron matter
• Fermions in Two Dimensions: Scattering and Many-Body Properties
• From weak to strong: constrained extrapolation of perturbation series with applications to dilute Fermi systems
• Vortices in low-density neutron matter and cold Fermi gases
• Pairing in two-dimensional Fermi gases with a coordinate-space potential
• Supernova Neutrinos as a Precise Probe of Nuclear Neutron Skin
• Small Bits of Cold Dense Matter
• Measuring the vortex-nucleus pinning force from pulsar glitch rates
• Testing the formation scenarios of binary neutron star systems with measurements of the neutron star moment of inertia
• Ensembles of unified crust and core equations of state in a nuclear-multimessenger astrophysics environment
• A Multi-Purpose Platform for Analog Quantum Simulation
• Perturbative treatment of nonlocal chiral interactions in auxiliary-field diffusion Monte Carlo calculations
• Superfluid neutron matter with a twist
• Auxiliary Field Quantum Monte Carlo for Dilute Neutrons on the Lattice
• Perturbed nuclear matter studied within Density Functional Theory with a finite number of particles
• Strong-coupling effects of pairing fluctuations, and Anderson-Bogoliubov mode in neutron ${}^1$S${}_0$ superfluids in neutron stars
• Spin Susceptibility in Neutron Matter from Quantum Monte Carlo Calculations
• Path Integral Monte Carlo study of particles obeying quantum mechanics and classical statistics
• Dense matter equation of state and neutron star properties from nuclear theory and experiment
• Universal bound states and resonances with Coulomb plus short-range potentials
• Superfluid density reduction and spin-imbalanced pairing in a fermionic superfluid due to dynamical boson exchange
• Constrained extrapolation problem and order-dependent mappings
• Skyrme-based extrapolation for the static response of neutron matter
• Effects of dilute neutron matter on the neutron star crust equation of state
• Neutron matter at the interface(s): static response and effective mass
• The EOS of neutron matter and the effect of $\Lambda$ hyperons to neutron star structure
• Proton fraction in neutron star matter: Dynamical mean-field approach
• Effects of isoscalar- and isovector-scalar meson mixing on neutron star structure