Low-density, one dimensional quantum gases in the presence of a localised attractive potential

Autor:	Goold, J., Donoghue, D. O, Busch, Th.
Rok vydání:	2008
Předmět:	Quantum Physics Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
Popis:	We investigate low-density, quantum-degenerate gases in the presence of a localised attractive potential in the centre of a one-dimensional harmonic trap.The attractive potential is modelled using a parameterised delta-function, allowing us to determine all single particle eigenfunctions analytically. From these we calculate the ground state many-body properties for a system of spin-polarised fermions and, using the Bose-Fermi mapping theorem, extend the results to strongly interacting bosonic systems. We discuss the single particle densities, the pair correlation functions, the reduced single particle density matrices and the momentum distributions as a function of particle number and strength of the attractive point potential. As an important experimental observable, we place special emphasis on spatial coherence properties of such samples. Comment: 15 pages, 9 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0806.4337 Zobrazit plný text záznamu View this record from Arxiv