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29 papers · 1 filter
Superfluidity and Anderson localisation for a weakly interacting Bose gas in a quasiperiodic potential
Xiaolong Deng, Roberta Citro, Anna Minguzzi +1
Using exact diagonalisation and Density Matrix Renormalisation group (DMRG) approach, we analyse the transition to a localised state of a weakly interacting quasi-1D Bose gas subje…
Many Body Theory for Quartets, Trions, and Pairs in Low Density Multi-Component Fermi-Systems
P. Schuck, T. Sogo, G. Röpke
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.
Uniaxial Strain in Graphene by Raman Spectroscopy: G peak splitting, Gruneisen Parameters and Sample Orientation
T. M. G. Mohiuddin, A. Lombardo, R. R. Nair +10
Graphene is the two-dimensional building block for carbon allotropes of every other dimensionality. Since its experimental discovery, graphene continues to attract enormous interes…
Momentum dependence of the spin susceptibility in two dimensions: nonanalytic corrections in the Cooper channel
Stefano Chesi, Robert Andrzej Żak, Pascal Simon +1
We consider the effect of rescattering of pairs of quasiparticles in the Cooper channel resulting in the strong renormalization of second-order corrections to the spin susceptibili…
Internal One-Particle Density Matrix for Bose-Einstein Condensates with Finite Number of Particles in a Harmonic Potential
Taiichi Yamada, Yasuro Funaki, Hisashi Horiuchi +3
Investigations on the internal one-particle density matrix in the case of Bose-Einstein condensates with a finite number () of particles in a harmonic potential are performed. W…
Metal-insulator transition in the Hartree-Fock phase diagram of the fully polarized homogeneous electron gas in two dimensions
B. Bernu, F. Delyon, M. Duneau +1
We determine numerically the ground state of the two-dimensional, fully polarized electron gas within the Hartree-Fock approximation without imposing any particular symmetries on t…