Nuclear Superfluid Dynamics within TDSLDA

In spite of the known great importance of the pairing in nuclear structure studies, the effect of pairing on nuclear dynamics has rarely been investigated to date. We attack this problem by applying a microscopic dynamic approach, Time-Dependent Density Functional Theory (TDDFT) extended for superfluid systems with local treatment of pairing, known as Time-Dependent Superfluid Local Density Approximation (TDSLDA) (see, e.g., [1]). Its application started only very recently with top-tier supercomputers. In this talk, I will first digest the theoretical framework of TDSLDA and its applications to a variety of nuclear dynamics: giant resonances [2,3], fission [4,5], heavy-ion reactions [6], and superfluid vortices in the inner crust of neutron stars [7]. Especially, I will put special focus on dynamics of quantized vortices in the presence of nuclear impurities [7], which govern vortex pinning mechanism at the heart of the pulsar glitch phenomenon, a sudden change of the rotational frequency of a neutron star (see, e.g., [8]).

References:

[1] A. Bulgac, Ann. Rev. Nucl. Part. Sci. 63, 97 (2013).

[2] I. Stetcu, C.A. Bertulani, A. Bulgac, P. Magierski, and K. J. Roche, Phys. Rev. Lett. 114, 012701 (2015).

[3] I. Stetcu, A. Bulgac, P. Magierski, and K. J. Roche, Phys. Rev. C 84, 051309(R) (2011).

[4] A. Bulgac, P. Magierski, K.J. Roche, and I. Stetcu, Phys. Rev. Lett. 116, 122504 (2016).

[5] A. Bulgac, Shi Jin, K.J. Roche, N. Schunck, and I. Stetcu, arXiv:1806.00694.

[6] P. Magierski, K. Sekizawa, and G. Wlazłowski, Phys. Rev. Lett. 119, 042501 (2017).

[7] G. Wlazłowski, K. Sekizawa, P. Magierski, A. Bulgac, and M.M. Forbes, Phys. Rev. Lett. 117, 232701 (2016).

[8] B. Haskell and A. Melatos, Int. J. Mod. Phys. D 24, 1530008 (2015).