Sogo, T., Röpke, G., Schuck, P.
Alpha-particle (quartet) condensation in homogeneous spin-isospin symmetric nuclear matter is investigated. The usual Thouless criterion for the critical temperature is extended to the quartet case....
Many Body Theory for Quartets, Trions, and Pairs in Low Density Multi-Component Fermi-Systems (2008)
Schuck, P., Sogo, T., Röpke, G.
A selfconsistent many body approach for the description of gases with quartets, trions, and pairs is presented. Applications to 3D Fermi systems at low density are discussed.
Dynamical properties of dipolar Fermi gases (2008)
Sogo, T, He, L, Miyakawa, T, Yi, S, Lu, H, Pu, H
We investigate dynamical properties of a one-component Fermi gas with dipole-dipole interaction between particles. Using a variational function based on the Thomas-Fermi density distribution in phase...
Semi-analytic Faddeev solution to the $N$-boson problem with zero-range interactions (2004)
Sogo, T., Sørensen, O., Jensen, A. S., Fedorov, D. V.
We study two-body correlations for $N$ identical bosons by use of the hyperspherical adiabatic expansion method. We use the zero-range interaction and derive a transcendental equation determining the...
Two-component boson systems with hyperspherical coordinates (2004)
Sogo, T, Sørensen, O, Jensen, A S, Fedorov, D V
The effective potential is computed for two boson systems in one trap as a function of their two individual hyperadii and the distance between their centers. Zero-range interactions are used and only...
Stability and structure of two coupled boson systems in an external field (2004)
Sogo, T., Sørensen, O., Jensen, A. S., Fedorov, D. V.
The lowest adiabatic potential expressed in hyperspherical coordinates is estimated for two boson systems in an external harmonic trap. Corresponding conditions for stability are investigated and the...
Collective ferromagnetism in two-component Fermi-degenerate gas trapped in finite potential (2002)
Spin asymmetry of the ground states is studied for the trapped spin-degenerate (two-component) gases of the fermionic atoms with the repulsive interaction between different components, and, for large...
Sogo, T., Miyakawa, T., Suzuki, T., Yabu, H.
We perform Random Phase Approximation (RPA) study of collective excitations in the bose-fermi mixed degenerate gas of Alkali-metal atoms at T=0. The calculation is done by diagonalization in a model...