Abstract
Structure of cold nuclear matter at subnuclear densities for the proton fraction [Formula Presented] 0.3, and 0.1 is investigated by quantum molecular dynamics (QMD) simulations. We demonstrate that the phases with slablike and rodlike nuclei, etc. can be formed dynamically from hot uniform nuclear matter without any assumptions on nuclear shape, and also systematically analyze the structure of cold matter using two-point correlation functions and Minkowski functionals. In our simulations, we also observe intermediate phases, which have complicated nuclear shapes. It has been found out that these phases can be characterized as those with negative Euler characteristic. Our result implies the existence of these kinds of phases in addition to the simple “pasta” phases in neutron star crusts and supernova inner cores. In addition, we investigate the properties of the effective QMD interaction used in the present work to examine the validity of our results. The resultant energy per nucleon [Formula Presented] of the pure neutron matter, the proton chemical [Formula Presented] in pure neutron matter and the nuclear surface tension [Formula Presented] are generally reasonable in comparison with other nuclear interactions.
| Original language | English |
|---|---|
| Number of pages | 1 |
| Journal | Physical Review C - Nuclear Physics |
| Volume | 68 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2003 Jan 1 |
Fingerprint
ASJC Scopus subject areas
- Nuclear and High Energy Physics
Cite this
Structure of cold nuclear matter at subnuclear densities by quantum molecular dynamics. / Watanabe, Gentaro; Sato, Katsuhiko; Yasuoka, Kenji; Ebisuzaki, Toshikazu.
In: Physical Review C - Nuclear Physics, Vol. 68, No. 3, 01.01.2003.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Structure of cold nuclear matter at subnuclear densities by quantum molecular dynamics
AU - Watanabe, Gentaro
AU - Sato, Katsuhiko
AU - Yasuoka, Kenji
AU - Ebisuzaki, Toshikazu
PY - 2003/1/1
Y1 - 2003/1/1
N2 - Structure of cold nuclear matter at subnuclear densities for the proton fraction [Formula Presented] 0.3, and 0.1 is investigated by quantum molecular dynamics (QMD) simulations. We demonstrate that the phases with slablike and rodlike nuclei, etc. can be formed dynamically from hot uniform nuclear matter without any assumptions on nuclear shape, and also systematically analyze the structure of cold matter using two-point correlation functions and Minkowski functionals. In our simulations, we also observe intermediate phases, which have complicated nuclear shapes. It has been found out that these phases can be characterized as those with negative Euler characteristic. Our result implies the existence of these kinds of phases in addition to the simple “pasta” phases in neutron star crusts and supernova inner cores. In addition, we investigate the properties of the effective QMD interaction used in the present work to examine the validity of our results. The resultant energy per nucleon [Formula Presented] of the pure neutron matter, the proton chemical [Formula Presented] in pure neutron matter and the nuclear surface tension [Formula Presented] are generally reasonable in comparison with other nuclear interactions.
AB - Structure of cold nuclear matter at subnuclear densities for the proton fraction [Formula Presented] 0.3, and 0.1 is investigated by quantum molecular dynamics (QMD) simulations. We demonstrate that the phases with slablike and rodlike nuclei, etc. can be formed dynamically from hot uniform nuclear matter without any assumptions on nuclear shape, and also systematically analyze the structure of cold matter using two-point correlation functions and Minkowski functionals. In our simulations, we also observe intermediate phases, which have complicated nuclear shapes. It has been found out that these phases can be characterized as those with negative Euler characteristic. Our result implies the existence of these kinds of phases in addition to the simple “pasta” phases in neutron star crusts and supernova inner cores. In addition, we investigate the properties of the effective QMD interaction used in the present work to examine the validity of our results. The resultant energy per nucleon [Formula Presented] of the pure neutron matter, the proton chemical [Formula Presented] in pure neutron matter and the nuclear surface tension [Formula Presented] are generally reasonable in comparison with other nuclear interactions.
UR - http://www.scopus.com/inward/record.url?scp=85035284684&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85035284684&partnerID=8YFLogxK
U2 - 10.1103/PhysRevC.68.035806
DO - 10.1103/PhysRevC.68.035806
M3 - Article
VL - 68
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 3
ER -