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The linear response of a neutron spin-triplet superfluid onto external weak axial-vector field is studied for the case of $^{3}P_{2}$ pairing with a projection of the total angular momentum $m_{j}=0$. The problem is considered in the BCS…

太阳与恒星天体物理 · 物理学 2014-11-20 L. B. Leinson

The linear response of a nonrelativistic superfluid baryon system on an external weak field is investigated while taking into account of the Fermi-liquid interactions. We generalize the theory developed by Leggett for a superfluid…

高能天体物理现象 · 物理学 2009-08-07 L. B. Leinson

Experiments with cold Fermi atoms can be tuned to probe strongly interacting fluids that are very similar to the low-density neutron matter found in the crusts of neutron stars. In contrast to traditional superfluids and superconductors,…

核理论 · 物理学 2008-11-26 Alexandros Gezerlis , J. Carlson

We present a Quantum Monte Carlo study of the zero temperature equation of state of neutron matter and the computation of the $^1S_0$ pairing gap in the low-density regime with $\rho<0.04$ fm$^{-3}$. The system is described by a…

核理论 · 物理学 2008-11-26 S. Gandolfi , A. Yu. Illarionov , S. Fantoni , F. Pederiva , K. E. Schmidt

Our previous investigation within the time-dependent nuclear energy-density functional theory showed that the nuclear superfluids contained inside cold neutron stars could become gapless under certain circumstances. The absence of a gap in…

核理论 · 物理学 2025-06-13 Valentin Allard , Nicolas Chamel

Neutrino energy losses through neutral weak currents in the triplet-spin superfluid neutron liquid are studied for the case of condensate involving several magnetic quantum numbers. Low-energy excitations of the multicomponent condensate in…

高能物理 - 唯象学 · 物理学 2011-10-25 L. B. Leinson

We report results of the equation of state of neutron matter in the low--density regime, where the Fermi wave vector ranges from $0.4 fm^{-1} \leq k_F \leq 1.0 fm^{-1}$. Neutron matter in this regime is superfluid because of the strong and…

核理论 · 物理学 2009-10-29 S. Gandolfi , A. Yu. Illarionov , F. Pederiva , K. E. Schmidt , S. Fantoni

The influence of the admixture of the $^{3}F_{2}$ state onto collective spin oscillations and neutrino emission processes in the triplet superfluid neutron liquid is studied in the BCS approximation. The eigen mode of spin oscillations with…

核理论 · 物理学 2011-10-11 L. B. Leinson

Influence of asymmetry on superfluidity of nuclear matter with triplet-singlet pairing of nucleons (in spin and isospin spaces) is considered within the framework of a Fermi-liquid theory. Solutions of self-consistent equations for the…

核理论 · 物理学 2009-11-06 A. I. Akhiezer , A. A. Isayev , S. V. Peletminsky , A. A. Yatsenko

Neutrino emission due to the pair breaking and formation processes in the bulk triplet superfluid in neutron stars is investigated with taking into account of anomalous weak interactions. We consider the problem in the BCS approximation…

太阳与恒星天体物理 · 物理学 2010-04-06 L. B. Leinson

The slow zero-sound mode expected near the Mott transition in strongly interacting two-dimensional Fermi systems that are neutral is shown to persist as the physical sound mode in the case that the fermion carries electronic charge and is…

凝聚态物理 · 物理学 2009-10-22 J. P. Rodriguez

We review recent progress in the theory of neutron matter with particular emphasis on its superfluid properties. Results of quantum Monte Carlo calculations of simple and realistic models of uniform superfluid neutron gas are discussed…

The superfluid drag effect, in hydrodynamics of pulsating neutron stars, is conventionally described with the aid of the entrainment matrix relating the mass currents with the velocities of superfluid flows in the system. Equations for the…

高能天体物理现象 · 物理学 2017-07-17 Lev B. Leinson

Superfluid states of symmetric nuclear matter with finite total momentum of Cooper pairs (nuclear LOFF phase) are studied with the use of Fermi-liquid theory in the model with Skyrme effective forces. It is considered the case of four-fold…

核理论 · 物理学 2009-11-07 A. A. Isayev

The condensation of neutrons into a 3P2 superfluid phase occurs at densities relevant for the interior of neutron stars. The triplet pairing breaks rotational symmetry spontaneously and leads to the existence of gapless modes (angulons)…

核理论 · 物理学 2013-05-29 Paulo F. Bedaque , Amy N. Nicholson

We examine the influence of the anisotropy of the superfluid energy gap and residual Fermi-liquid interactions in the triplet-correlated neutron liquid onto neutrino energy losses through neutral weak currents. The neutrino-pair emission…

核理论 · 物理学 2013-02-12 L. B. Leinson

We calculate and provide analytic fits of the factors which describe the reduction of the neutrino emissivity of modified Urca and nucleon-nucleon bremsstrahlung processes by superfluidity of neutrons and protons in neutron-star cores. We…

天体物理学 · 物理学 2011-07-19 M. E. Gusakov

We explore the theoretical possibility of $^3P_0$ neutron superfluid in dilute spin-polarized neutron matter, which may be relevant to the crust region of a magnetized neutron star. In such a dilute regime where the neutron Fermi energy is…

核理论 · 物理学 2024-01-17 Hiroyuki Tajima , Hiroshi Funaki , Yuta Sekino , Nobutoshi Yasutake , Mamoru Matsuo

Neutron matter is an intriguing nuclear system with multiple connections to other areas of physics. Considerable progress has been made over the last two decades in exploring the properties of pure neutron fluids. Here we begin by reviewing…

核理论 · 物理学 2015-10-27 Stefano Gandolfi , Alexandros Gezerlis , J. Carlson

We consider cooling of neutron stars (NSs) with superfluid cores composed of neutrons, protons, and electrons (assuming singlet-state pairing of protons, and triplet-state pairing of neutrons). We mainly focus on (nonstandard) triplet-state…

天体物理学 · 物理学 2009-11-07 M. E. Gusakov , O. Y. Gnedin
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