Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-04-17
Phys. Rev. A 78, 013604(2008)
Physics
Condensed Matter
Strongly Correlated Electrons
7 pages, 9 figures
Scientific paper
10.1103/PhysRevA.78.013604
We carry out a detailed examination of the ground state property of few-boson system in a one-dimensional hard wall potential with a $\delta -$ split in the center. In the Tonks-Girardeau limit with infinite repulsion between particles, we use the Bose-Fermi mapping to construct the exact $N-$ particle ground state wavefunction which allows us to study the correlation properties accurately. For the general case with finite inter-particle interaction, the exact diagonalization method is exploited to study the ground-state density distribution, occupation number distribution, and momentum distribution for variable interaction strengths and barrier heights. The secondary peaks in the momentum distribution reveal the interference between particles on the two sides of the split, which is more prominent for large barrier strength and small interaction strength.
Chen Shu
Hao Yajiang
Yin Xiangguo
Zhang Yunbo
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