Zobrazeno 1 - 10
of 582
pro vyhledávání: '"Gandolfi, Stefano A."'
Nuclear many-body systems, ranging from nuclei to neutron stars, are some of the most interesting physical phenomena in our universe, and Quantum Monte Carlo (QMC) approaches are among the most accurate many-body methods currently available to study
Externí odkaz:
http://arxiv.org/abs/2409.16365
Publikováno v:
Phys. Rev. A 110, 043320 - Published 25 October 2024
We present Quantum Monte Carlo calculations of the properties of a two-component mass imbalanced Fermi gas, corresponding to the $^6$Li-$^{40}$K mixture. We compute the equation of state of the unpolarized system as a function of the scattering lengt
Externí odkaz:
http://arxiv.org/abs/2407.12102
Autor:
Chatziioannou, Katerina, Cromartie, H. Thankful, Gandolfi, Stefano, Tews, Ingo, Radice, David, Steiner, Andrew W., Watts, Anna L.
The past years have witnessed tremendous progress in understanding the properties of neutron stars and of the dense matter in their cores, made possible by electromagnetic observations of neutron stars and the detection of gravitational waves from th
Externí odkaz:
http://arxiv.org/abs/2407.11153
Autor:
Andreoli, Lorenzo, King, Garrett B., Pastore, Saori, Piarulli, Maria, Carlson, Joseph, Gandolfi, Stefano, Wiringa, Robert B.
The Short-Time approximation is a method introduced to evaluate electroweak nuclear response for systems with $A\geq12$, extending the reach of first-principle many-body Quantum Monte Carlo calculations. Using realistic two- and three-body nuclear in
Externí odkaz:
http://arxiv.org/abs/2407.06986
Autor:
Cirigliano, Vincenzo, Dekens, Wouter, de Vries, Jordy, Gandolfi, Stefano, Hoferichter, Martin, Mereghetti, Emanuele
Publikováno v:
Phys. Rev. Lett. 133, 211801 (2024)
The accuracy of $V_{ud}$ determinations from superallowed $\beta$ decays critically hinges on control over radiative corrections. Recently, substantial progress has been made on the single-nucleon, universal corrections, while nucleus-dependent effec
Externí odkaz:
http://arxiv.org/abs/2405.18469
Autor:
Cirigliano, Vincenzo, Dekens, Wouter, de Vries, Jordy, Gandolfi, Stefano, Hoferichter, Martin, Mereghetti, Emanuele
Publikováno v:
Phys. Rev. C 110, 055502 (2024)
Radiative corrections are essential for an accurate determination of $V_{ud}$ from superallowed $\beta$ decays. In view of recent progress in the single-nucleon sector, the uncertainty is dominated by the theoretical description of nucleus-dependent
Externí odkaz:
http://arxiv.org/abs/2405.18464
Autor:
Somasundaram, Rahul, Armstrong, Cassandra L., Giuliani, Pablo, Godbey, Kyle, Gandolfi, Stefano, Tews, Ingo
The validation, verification, and uncertainty quantification of computationally expensive theoretical models of quantum many-body systems require the construction of fast and accurate emulators. In this work, we develop emulators for auxiliary field
Externí odkaz:
http://arxiv.org/abs/2404.11566
Publikováno v:
Phil. Trans. R. Soc. A. 382: 20230127 (2024)
We employ constrained path Auxiliary Field Quantum Monte Carlo (AFQMC) in the pursuit of studying physical nuclear systems using a lattice formalism. Since AFQMC has been widely used in the study of condensed-matter systems such as the Hubbard model,
Externí odkaz:
http://arxiv.org/abs/2310.01504
In this work we derive a systematic short-range expansion of the many-body wave function. At leading order, the wave function is factorized to a zero-energy $s$-wave correlated pair and spectator particles, while terms that include energy derivatives
Externí odkaz:
http://arxiv.org/abs/2307.05910
Autor:
Kim, Jane, Pescia, Gabriel, Fore, Bryce, Nys, Jannes, Carleo, Giuseppe, Gandolfi, Stefano, Hjorth-Jensen, Morten, Lovato, Alessandro
Ultra-cold Fermi gases display diverse quantum mechanical properties, including the transition from a fermionic superfluid BCS state to a bosonic superfluid BEC state, which can be probed experimentally with high precision. However, the theoretical d
Externí odkaz:
http://arxiv.org/abs/2305.08831