Speaker
Description
In recent years, there has been a dramatic improvement in our ability to probe the nuclear many-body problem, due to the availability of several different powerful many-body techniques and sophisticated nuclear interactions derived from chiral effective field theory (EFT). In a recent paper [1], we investigated the perturbativeness of these chiral EFT interactions in a many-body context, using quantum Monte Carlo (QMC). QMC techniques have been used to probe a variety of nuclear many-body systems, ranging from light nuclei to neutron matter [2]. There are a variety of ways in which the Monte Carlo method can be applied to the many-body problem. The diffusion Monte Carlo method involves propagating a many-body system through imaginary time can be used on the continuum, where it is often improved with the application of auxiliary fields to handle complicated nuclear correlations, as well as in a lattice formalism, where particles are allowed to hop between lattice sites and interact with each other when they occupy the same site. In a recent publication, we began investigating how this lattice formulation, which is typically used to study condensed matter systems, can be applied to systems of interest to nuclear physics [3]. This presentation will discuss recent work involving the application of QMC approaches to the nuclear many-body problem, as well as a further discussion on how these methods can be improved to help expand on our understanding of nuclear physics.
[1] R. Curry, J.E. Lynn, K.E. Schmidt, and A. Gezerlis., Second-Order Perturbation Theory in Continuum Quantum Monte Carlo Calculations, Phys. Rev. Res. 5, L042021 (2023)
[2] J. Carlson et al., Quantum Monte Carlo Methods for Nuclear Physics, Rev. Mod. Phys. 87, 1067 (2015).
[3] R. Curry, J. Dissanayake, S. Gandolfi, and A. Gezerlis., Auxiliary Field Quantum Monte Carlo for Nuclear Physics on the Lattice, arXiv:2310.01504.
| Keyword-1 | Quantum Monte Carlo |
|---|---|
| Keyword-2 | Chiral Effective Field Theory |
| Keyword-3 | Nuclear many-body physics |
