C. Drischler
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View article: Greedy emulators for nuclear two-body scattering
Greedy emulators for nuclear two-body scattering Open
Applications of reduced basis method emulators are increasing in low-energy nuclear physics because they enable fast and accurate sampling of high-fidelity calculations, enabling robust uncertainty quantification. In this paper, we develop…
View article: Microscopic constraints for the equation of state and structure of neutron stars: a Bayesian model mixing framework
Microscopic constraints for the equation of state and structure of neutron stars: a Bayesian model mixing framework Open
Bayesian model mixing (BMM) is a statistical technique that can combine constraints from different regions of an input space in a principled way. Here we extend our BMM framework for the equation of state (EOS) of strongly interacting matt…
View article: Motivations for early high-profile FRIB experiments
Motivations for early high-profile FRIB experiments Open
This white paper is the result of a collaboration by many of those that attended a workshop at the facility for rare isotope beams (FRIB), organized by the FRIB Theory Alliance (FRIB-TA), on ‘Theoretical Justifications and Motivations for …
View article: Resonant shattering flares as asteroseismic tests of chiral effective field theory
Resonant shattering flares as asteroseismic tests of chiral effective field theory Open
Chiral effective field theory (χEFT) has proved to be a powerful microscopic framework for predicting the properties of neutron-rich nuclear matter with quantified theoretical uncertainties up to about twice the nuclear saturation density.…
View article: Pi in the Sky: Neutron Stars with Exceptionally Light QCD Axions
Pi in the Sky: Neutron Stars with Exceptionally Light QCD Axions Open
We present a comprehensive study of axion condensed neutron stars that arise in models of an exceptionally light axion that couples to quantum chromodynamics (QCD). These axions solve the strong-charge-parity (CP) problem, but have a mass-…
View article: Resonant shattering flares as asteroseismic tests of chiral effective field theory
Resonant shattering flares as asteroseismic tests of chiral effective field theory Open
Chiral effective field theory ($χ$EFT) has proved to be a powerful microscopic framework for predicting the properties of neutron-rich nuclear matter with quantified theoretical uncertainties up to about twice the nuclear saturation densit…
View article: Bayesian mixture model approach to quantifying the empirical nuclear saturation point
Bayesian mixture model approach to quantifying the empirical nuclear saturation point Open
The equation of state (EOS) in the limit of infinite symmetric nuclear matter exhibits an equilibrium density, $n_0 \\approx 0.16 \\, \\mathrm{fm}^{-3}$, at which the pressure vanishes and the energy per particle attains its minimum, $E_0 …
View article: Theoretical and experimental constraints for the equation of state of dense and hot matter
Theoretical and experimental constraints for the equation of state of dense and hot matter Open
This review aims at providing an extensive discussion of modern constraints relevant for dense and hot strongly interacting matter. It includes theoretical first-principle results from lattice and perturbative QCD, as well as chiral effect…
View article: A Bayesian mixture model approach to quantifying the empirical nuclear saturation point
A Bayesian mixture model approach to quantifying the empirical nuclear saturation point Open
The equation of state (EOS) in the limit of infinite symmetric nuclear matter exhibits an equilibrium density, $n_0 \approx 0.16 \, \mathrm{fm}^{-3}$, at which the pressure vanishes and the energy per particle attains its minimum, $E_0 \ap…
View article: From chiral EFT to perturbative QCD: a Bayesian model mixing approach to symmetric nuclear matter
From chiral EFT to perturbative QCD: a Bayesian model mixing approach to symmetric nuclear matter Open
Constraining the equation of state (EOS) of strongly interacting, dense matter is the focus of intense experimental, observational, and theoretical effort. Chiral effective field theory ($χ$EFT) can describe the EOS between the typical den…
View article: Wave-function-based emulation for nucleon-nucleon scattering in momentum space
Wave-function-based emulation for nucleon-nucleon scattering in momentum space Open
Emulators for low-energy nuclear physics can provide fast and accurate predictions of bound-state and scattering observables for applications that require repeated calculations with different parameters, such as Bayesian uncertainty quanti…
View article: Data sets for scattering emulators in momentum space
Data sets for scattering emulators in momentum space Open
Interaction data files used to generate the plots for the paper ''Wave-function-based emulation for nucleon-nucleon scattering in momentum space'' by Garcia, Drischler, Furnstahl, Melendez, and Zhang (DOI: 10.1103/PhysRevC.107.054001).
View article: Data sets for scattering emulators in momentum space
Data sets for scattering emulators in momentum space Open
Interaction data files used to generate the plots for the paper ''Wave-function-based emulation for nucleon-nucleon scattering in momentum space'' by Garcia, Drischler, Furnstahl, Melendez, and Zhang (DOI: 10.1103/PhysRevC.107.054001).
View article: Theoretical and Experimental Constraints for the Equation of State of Dense and Hot Matter
Theoretical and Experimental Constraints for the Equation of State of Dense and Hot Matter Open
This review aims at providing an extensive discussion of modern constraints relevant for dense and hot strongly interacting matter. It includes theoretical first-principle results from lattice and perturbative QCD, as well as chiral effect…
View article: BUQEYE guide to projection-based emulators in nuclear physics
BUQEYE guide to projection-based emulators in nuclear physics Open
The BUQEYE collaboration (Bayesian Uncertainty Quantification: Errors in Your effective field theory) presents a pedagogical introduction to projection-based, reduced-order emulators for applications in low-energy nuclear physics. The term…
View article: Dense Nuclear Matter Equation of State from Heavy-Ion Collisions
Dense Nuclear Matter Equation of State from Heavy-Ion Collisions Open
The nuclear equation of state (EOS) is at the center of numerous theoretical and experimental efforts in nuclear physics. With advances in microscopic theories for nuclear interactions, the availability of experiments probing nuclear matte…
View article: Wave-function-based emulation for nucleon-nucleon scattering in momentum space
Wave-function-based emulation for nucleon-nucleon scattering in momentum space Open
Emulators for low-energy nuclear physics can provide fast & accurate predictions of bound-state and scattering observables for applications that require repeated calculations with different parameters, such as Bayesian uncertainty quantifi…
View article: BUQEYE Guide to Projection-Based Emulators in Nuclear Physics
BUQEYE Guide to Projection-Based Emulators in Nuclear Physics Open
The BUQEYE collaboration (Bayesian Uncertainty Quantification: Errors in Your EFT) presents a pedagogical introduction to projection-based, reduced-order emulators for applications in low-energy nuclear physics. The term emulator refers he…
View article: Long Range Plan: Dense matter theory for heavy-ion collisions and neutron stars
Long Range Plan: Dense matter theory for heavy-ion collisions and neutron stars Open
Since the release of the 2015 Long Range Plan in Nuclear Physics, major events have occurred that reshaped our understanding of quantum chromodynamics (QCD) and nuclear matter at large densities, in and out of equilibrium. The US nuclear c…
View article: Model reduction methods for nuclear emulators
Model reduction methods for nuclear emulators Open
The field of model order reduction (MOR) is growing in importance due to its ability to extract the key insights from complex simulations while discarding computationally burdensome and superfluous information. We provide an overview of MO…
View article: Large and massive neutron stars: Implications for the sound speed within QCD of dense matter
Large and massive neutron stars: Implications for the sound speed within QCD of dense matter Open
Here, the NASA telescope NICER has recently measured x-ray emissions from the heaviest of the precisely known two-solar mass neutron stars, PSR J0740 + 6620. Analysis of the data suggests that PSR J0740 + 6620 has a radius in the range of …
View article: Large and massive neutron stars: Implications for the sound speed in dense QCD
Large and massive neutron stars: Implications for the sound speed in dense QCD Open
The NASA telescope NICER has recently measured x-ray emissions from the heaviest of the precisely known two-solar mass neutron stars, PSR J0740+6620. Analysis of the data [Miller et al., Astrophys. J. Lett. 918, L28 (2021); Riley et al., A…
View article: Effective field theory for dilute Fermi systems at fourth order
Effective field theory for dilute Fermi systems at fourth order Open
We discuss high-order calculations in perturbative effective field theory for fermions at low energy scales. The Fermi-momentum or kFas expansion for the ground-state energy of the dilute Fermi gas is calculated to fourth order, both in cu…
View article: Limiting masses and radii of neutron stars and their implications
Limiting masses and radii of neutron stars and their implications Open
We combine the equation of state of dense matter up to twice nuclear saturation density nsat obtained using chiral effective field theory (χEFT) and recent observations of neutron stars to gain insights about the high-density matter encoun…
View article: How Well Do We Know the Neutron-Matter Equation of State at the Densities Inside Neutron Stars? A Bayesian Approach with Correlated Uncertainties
How Well Do We Know the Neutron-Matter Equation of State at the Densities Inside Neutron Stars? A Bayesian Approach with Correlated Uncertainties Open
We introduce a new framework for quantifying correlated uncertainties of the infinite-matter equation of state derived from chiral effective field theory (χEFT). Bayesian machine learning via Gaussian processes with physics-based hyperpara…