Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session F13: Nuclear Theory II
9:00 AM–11:15 AM,
Thursday, November 30, 2023
Hilton Waikoloa Village
Room: Kona 2-3
Chair: Gregory Potel, Lawrence Livermore Natl Lab
Abstract: F13.00009 : Recent developments of emulators for quantum continuum states*
11:00 AM–11:15 AM
Presenter:
Xilin Zhang
(Facility for Rare Isotope Beams/Michigan State U.)
Author:
Xilin Zhang
(Facility for Rare Isotope Beams/Michigan State U.)
In this talk, I will use nuclear systems as examples to discuss a type of emulator based on the so-called reduced basis method (also known as eigenvector continuation in nuclear theory). I will illustrate how to apply this emulation to extrapolate continuum-state calculations at complex energies, where the calculations can be realized using bound-state methods, to the real energies and the region of the energy’s complex plane where resonances can be identified. In the latter region, traditional bound-state methods are not applicable. I will also show the emulator’s interpolation in the Hamiltonian’s parameter space. The connection between this emulator and the existing continuum calculation methods, including complex scaling and Berggren basis, will be discussed as well.
*The support from the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under the FRIB Theory Alliance Award No. DE-SC0013617 is acknowledged.
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