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 D08: Minisymposium: Solid State Physics in Neutron Stars: Crystallography and Superfluidity
9:00 AM–11:15 AM,
Wednesday, November 29, 2023
Hilton Waikoloa Village
Room: Kohala 1
Chair: Kei Iida
Abstract: D08.00007 : Time-Dependent Slef-Consistent Band Theory for the Inner Crust of Neutron Stars: Anti-Entrainment Effects in the Slab Phase*
10:45 AM–11:00 AM
Presenter:
Kazuyuki Sekizawa
(Tokyo Institute of Technology)
Authors:
Kazuyuki Sekizawa
(Tokyo Institute of Technology)
Kenta Yoshimura
(Tokyo Institute of Technology)
Masayuki Matsuo
(Niigata University)
The application of the band theory in the context of neutron stars started only in 2005 [1, 2]. In Ref. [1,2], it has been shown that conduction neutron number density is reduced by Bragg scatterings of dripped neutrons off the periodic potential, leading to increase of the neutron effective mass, which is called "entrainment effect." Moreover, it has been advocated that the neutron effective mass could be more than 10 times larger than the bare neutron mass in some density region [2], which affects interpretations of various astrophysical phenomena. On the other hand, recent fully self-consistent band theory calculations [3] indicate that the neutron effective mass could be reduced at least for the slab phase.
To resolve the debatable situation, we are developing fully self-consistent time-dependent band theory for the inner crust of neutron stars based on time-dependent density functional theory (TDDFT) [4, 5]. In this contribution, we present the outcomes of the first application to the slab phase [4], where we propose an intuitive, real-time method to dynamically quantify the entrainment effect, showing a reduction of the neutron effective mass, identifying an "anti-entrainment" phenomenon in the slab phase.
[1] B. Carter, N. Chamel, and P. Haensel, Nucl. Phys. A748, 675 (2005).
[2] N. Chamel, Nucl. Phys. A773, 263 (2005).
[3] Yu Kashiwaba and T. Nakatsukasa, Phys. Rev. C 100, 035804 (2019).
[4] K. Sekizawa, S. Kobayashi, and M. Matsuo, Phys. Rev. C 105, 045807 (2022).
[5] K. Yoshimura and K. Sekizawa, arXiv:2306.03327 [nucl-th].
*This work is supported by JSPS Grant-in-Aid for Scientific Research, Grant Nos. 23K03410 and 23H01167.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700