scholarly journals Cold atom quantum simulator for dilute neutron matter

2019 ◽  
Vol 28 (01n02) ◽  
pp. 1930001 ◽  
Author(s):  
Munekazu Horikoshi ◽  
Makoto Kuwata-Gonokami
Keyword(s):  
Wave Scattering ◽  
Feshbach Resonance ◽  
Atomic System ◽  
Scattering Length ◽  
Cold Atom ◽  
Neutron Matter ◽  
Nuclear System ◽  
S Wave ◽  
Quantum Simulator ◽  
Universal Interaction

The internal structure of neutron stars and the physical properties of nuclei depend on the equation of state (EOS) of neutron matter. Dilute neutron matter is a quantum system of spin-1/2 Fermi particles interacting via s-wave scattering. Although a nuclear system and an ultracold atomic system have length scales and energy scales that differ by several orders of magnitude, both systems follow a common universal EOS considering their nondimensional universal interaction parameters. In this study, we determine the EOS of neutron matter in the dilute region, where the influence of the s-wave scattering length is dominant but that of the effective range is small, by utilizing a quantum simulator of ultracold 6Li atoms with Feshbach resonance.

scholarly journals s -wave scattering length of a Gaussian potential

2018 ◽  
Vol 97 (4) ◽  
Author(s):  
Peter Jeszenszki ◽  
Alexander Yu. Cherny ◽  
Joachim Brand
Keyword(s):  
Wave Scattering ◽  
Scattering Length ◽  
S Wave ◽  
Gaussian Potential

scholarly journals Dark Solitons in the Unitary Bose Gas

Symmetry ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 957
Author(s):  
Martino Calzavara ◽  
Luca Salasnich
Keyword(s):  
Wave Scattering ◽  
Scattering Length ◽  
Bose Gas ◽  
Hydrodynamic Equations ◽  
S Wave ◽  
Universal Equation ◽  
One Dimensional ◽  
Dark Solitons ◽  
Harmonic Confinement ◽  
Analytical Formulas

We study the dilute and ultracold unitary Bose gas, characterized by a universal equation of state due to the diverging s-wave scattering length, under a transverse harmonic confinement. From the hydrodynamic equations of superfluids we derive an effective one-dimensional nonpolynomial Schrödinger equation (1D NPSE) for the axial wavefunction which, however, also takes into account the transverse wavefunction. By solving the 1D NPSE we obtain meaningful analytical formulas for the dark (gray and black) solitons of the bosonic system.

The n-n S-wave scattering length from the neutron spectra of the reaction π− +d → 2n+γ

1975 ◽  
Vol 254 (2) ◽  
pp. 241-268 ◽  
Author(s):  
R.M. Salter ◽  
R.P. Haddock ◽  
M. Zeller ◽  
D.R. Nygren ◽  
J.B. Czirr
Keyword(s):  
Wave Scattering ◽  
Scattering Length ◽  
S Wave ◽  
Neutron Spectra
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