Dilute neutron star matter from neural-network quantum states

Autor:	Fore, Bryce, Kim, Jane M., Carleo, Giuseppe, Hjorth-Jensen, Morten, Lovato, Alessandro
Rok vydání:	2022
Předmět:	Nuclear Theory Condensed Matter - Disordered Systems and Neural Networks Quantum Physics
Druh dokumentu:	Working Paper
Popis:	Low-density neutron matter is characterized by fascinating emergent quantum phenomena, such as the formation of Cooper pairs and the onset of superfluidity. We model this density regime by capitalizing on the expressivity of the hidden-nucleon neural-network quantum states combined with variational Monte Carlo and stochastic reconfiguration techniques. Our approach is competitive with the auxiliary-field diffusion Monte Carlo method at a fraction of the computational cost. Using a leading-order pionless effective field theory Hamiltonian, we compute the energy per particle of infinite neutron matter and compare it with those obtained from highly realistic interactions. In addition, a comparison between the spin-singlet and triplet two-body distribution functions indicates the emergence pairing in the $^1S_0$ channel. Comment: 6 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2212.04436 Zobrazit plný text záznamu View this record from Arxiv