189 citations · 1.2k across the 36 of their papers we have counts for
36 papers
The Quest for Superheavy Nuclei: A Theoretical Perspective
C. Simenel, Lu Guo, K. Sekizawa
The synthesis of superheavy nuclei (SHNs) lies at the forefront of nuclear physics, enabling researchers to probe the limits of nuclear stability and the influence of shell effects…
Phase transitions in the inner crust of neutron stars within the superfluid band theory: Competition between pairing and spin polarization under finite temperature and magnetic field
Kenta Yoshimura, Kazuyuki Sekizawa
Phase transitions of matter under changes of external environment such as temperature and magnetic field have attracted great interests to various quantum many-body systems. Severa…
Time-Dependent Superfluid Band Theory for the Inner Crust of Neutron Stars: Current Status and Future Challenges
Kazuyuki Sekizawa, Kenta Yoshimura
In this contribution, current status and future prospects of our ongoing project is summarized. In the inner crust of neutron stars, a variety of crystalline structures may emerge,…
Superfluid extension of the self-consistent time-dependent band theory for neutron star matter: Anti-entrainment versus superfluid effects in the slab phase
Kenta Yoshimura, Kazuyuki Sekizawa
Background: The inner crust of neutron stars consists of a Coulomb lattice of neutron-rich nuclei, immersed in a sea of superfluid neutrons with background relativistic electron ga…
Manifestation of pairing modes in nuclear collisions
A. Makowski, M. C. Barton, P. Magierski +2
We discuss the possible manifestation of pairing dynamics in nuclear collisions beyond the standard quasi-static treatment of pairing correlations. These involve solitonic excitati…
Possible Existence of Extremely Neutron-Rich Superheavy Nuclei in Neutron Star Crusts Under a Superstrong Magnetic Field
Kazuyuki Sekizawa, Kentaro Kaba
We investigate outer crust compositions for a wide range of magnetic field strengths, up to G, employing the latest experimental nuclear masses supplemente…
The International Linear Collider: Report to Snowmass 2021
Alexander Aryshev, Ties Behnke, Mikael Berggren +508
The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in the 2030s. The ILC addresses key questions for our…
Time-dependent extension of the self-consistent band theory for neutron star matter: Anti-entrainment effects in the slab phase
Kazuyuki Sekizawa, Sorataka Kobayashi, Masayuki Matsuo
Background: In the solid crust of neutron stars, a variety of crystalline structure may exist. Recently the band theory of solids has been applied to the inner crust of neutron sta…
Pairing dynamics and solitonic excitations in collisions of medium-mass, identical nuclei
Piotr Magierski, Andrzej Makowski, Matthew C. Barton +2
We present results of collisions of Zr+Zr and Zr+Zr obtained within time-dependent density functional theory (TDDFT) extended to superfluid systems, kno…
Determination of and stripping excitation functions for O+Ce using a Recoil Mass Spectrometer
Rohan Biswas, S. Nath, J. Gehlot +9
We report the first direct measurement of differential transfer cross sections using a Recoil Mass Spectrometer. Absolute differential and -stripping cross sections at $θ_…
Reaction mechanism study for multinucleon transfer processes in collisions of spherical and deformed nuclei at energies near and above the Coulomb barrier: The O+Sm reaction
B. J. Roy, S. Santra, A. Pal +6
Background: Multinucleon transfer reactions at energies around the Coulomb barrier offer a vital opportunity to study rich physics of nuclear structure and dynamics. Despite the co…
Rotating quantum turbulence in the unitary Fermi gas
Khalid Hossain, Konrad Kobuszewski, Michael McNeil Forbes +3
Quantized vortices carry the angular momentum in rotating superfluids, and are key to the phenomenon of quantum turbulence. Advances in ultra-cold atom technology enable quantum tu…
Kinetic energy dissipation and fluctuations in strongly-damped heavy-ion collisions within the stochastic mean-field approach
Sakir Ayik, Kazuyuki Sekizawa
Background: Microscopic mean-field approaches have been successful in describing the most probable reaction outcomes in low-energy heavy-ion reactions. However, those approaches ar…
TDHF and a macroscopic aspect of low-energy nuclear reactions
Kouhei Washiyama, Kazuyuki Sekizawa
Time-dependent Hartree--Fock (TDHF) method has been applied to various low-energy nuclear reactions, such as fusion, fission, and multinucleon transfer reactions. In this Mini Revi…
Quantal diffusion approach for multinucleon transfer processes in the Ni+Pb reactions: Toward the production of unknown neutron-rich nuclei
Kazuyuki Sekizawa, Sakir Ayik
Background: In recent years, substantial efforts have been made for the study of multinucleon transfer reactions at energies around the Coulomb barrier both experimentally and theo…
Pairing dynamics in low energy nuclear collisions
M. C. Barton, S. Jin, P. Magierski +3
Superfluidity is a generic feature of various quantum systems at low temperatures and it is in particular important for the description of dynamics of low energy nuclear reactions.…
Time-dependent Hartree-Fock plus Langevin approach for hot fusion reactions to synthesize the superheavy element
K. Sekizawa, K. Hagino
We develop a novel approach to fusion reactions for syntheses of superheavy elements, which combines the time-dependent Hartree-Fock (TDHF) method with a dynamical diffusion model…
TDHF Theory and Its Extensions for the Multinucleon Transfer Reaction: a Mini Review
Kazuyuki Sekizawa
Time-dependent Hartree-Fock (TDHF) theory has been a powerful tool in describing a variety of complex nuclear dynamics microscopically without empirical parameters. In this contrib…
Exploring Zeptosecond Quantum Equilibration Dynamics: From Deep-Inelastic to Fusion-Fission Outcomes in Ni+Ni Reactions
E. Williams, K. Sekizawa, D. J. Hinde +10
Energy dissipative processes play a key role in how quantum many-body systems dynamically evolve towards equilibrium. In closed quantum systems, such processes are attributed to th…
Pairing dynamics and time dependent density functional theory
P. Magierski, J. Grineviciute, K. Sekizawa
We discuss issues related to pairing dynamics in nuclear large amplitude collective motion. The examples of effects which are not properly described within BCS theory are presented…
Suppressed solitonic cascade in spin-imbalanced superfluid Fermi gas
Gabriel Wlazłowski, Kazuyuki Sekizawa, Maciej Marchwiany +1
Cold atoms experiments offer invaluable information on superfluid dynamics, including decay cascades of topological defects. While the cascade properties are well established for B…
Enhanced nucleon transfer in tip collisions of U+Sn
Kazuyuki Sekizawa
Multinucleon transfer processes in low-energy heavy ion reactions have attracted increasing interest in recent years aiming at production of new neutron-rich isotopes. Clearly, it…
Deep-inelastic multinucleon transfer processes in the O+Al reaction
B. J. Roy, Y. Sawant, P. Patwari +16
The reaction mechanism of deep-inelastic multinucleon transfer processes in the O+Al reaction at an incident O energy ( MeV) substantially abo…
Solitonic excitations in collisions of superfluid nuclei: a qualitatively new phenomenon distinct from the Josephson effect
Kazuyuki Sekizawa, Gabriel Wlazłowski, Piotr Magierski
Recently, we have reported a novel role of pairing in low-energy heavy ion reactions at energies above the Coulomb barrier, which may have a detectable impact on reaction outcomes,…