نتایج جستجو برای: superfluidity
تعداد نتایج: 1319 فیلتر نتایج به سال:
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 critical temperature and the energy gap at T = 0 are obtained with the use of Skyrme effective nucleon interaction. It is shown, that if the chemical potentials ...
The 1D flow of a continuous beam of Bose-Einstein condensed atoms in the presence of an obstacle is studied as a function of the beam velocity and of the type of perturbing potential (representing the interaction of the obstacle with the atoms of the beam). We identify the relevant regimes: stationary/time-dependent and superfluid/dissipative; the absence of drag is used as a criterion for supe...
In order to explore a possibility of superfluidity in confined strongly-correlated fermion systems, e.g., nano-scale cuprate High-Tc superconductors and atomic Fermi gases loaded on optical lattice, we implement an exact diagonalization code for their mathematical model, i.e., a trapped Hubbard model on the Earth Simulator. We compare two diagonalization algorithms, the traditional Lanczos meth...
Motivated by a similar approach for Born-Oppenheimer molecular dynamics, this paper proposes an extended shadow Lagrangian density quantum states of superfluids. The contains additional field variable that is forced to follow the wave function state through rapidly oscillating harmonic oscillator. By considering adiabatic limit large frequencies oscillator, we can derive two equations motions, ...
The equation of motion for the two-fermion two-time correlation function in pairing channel is considered at finite temperature. Within Matsubara formalism, Dyson-type Bethe-Salpeter (Dyson-BSE) with frequency-dependent interaction kernel obtained. Similarly to case zero temperature, it decomposed into static and dynamical components, where former given by contraction bare density latter repres...
We investigate the impacts of neutrino cooling mechanism inside neutron star (NS) core on light curves type-I X-ray bursts and superbursts. From several observations NS thermal evolution, physical processes fast cooling, such as direct Urca (DU) process, are indicated. They significantly decrease surface temperature NSs, though effect could be suppressed by nucleon superfluidity. In present stu...
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