1 |
No enhancement of the localization length for two interacting particles in a random potentialRömer, R. A., Schreiber, M. 30 October 1998 (has links) (PDF)
We study two interacting particles in a random potential chain by means of the transfer matrix
method. The dependence of the two-particle localization length lampta_2 on disorder and interaction
strength is investigated. Our results demonstrate that the recently proposed enhancement of lampta_2 as
compared to the results for single particles is entirely due to the finite size of the systems considered.
This is shown for a Hubbard-like onsite interaction and also a long-range interaction.
|
2 |
Weak delocalization due to long-range interaction for two electrons in a random potential chainRömer, R. A., Schreiber, M. 30 October 1998 (has links) (PDF)
We study two interacting particles in a random potential chain by a transfer matrix method which allows a correct handling of the symmetry of the two- particle wave function, but introduces an artificial ¨bag¨ interaction. The dependence of the two-particle localization length lambta 2on disorder, interaction strength and range is investigated. Our results demonstrate that the recently proposed enhancement of lambta 2 as compared to the results for single particles is vanishingly small for a Hubbard interaction. For longer-range interactions, we observe a small enhancement but with a different disorder dependence than proposed previously.
|
3 |
No enhancement of the localization length for two interacting particles in a random potentialRömer, R. A., Schreiber, M. 30 October 1998 (has links)
We study two interacting particles in a random potential chain by means of the transfer matrix
method. The dependence of the two-particle localization length lampta_2 on disorder and interaction
strength is investigated. Our results demonstrate that the recently proposed enhancement of lampta_2 as
compared to the results for single particles is entirely due to the finite size of the systems considered.
This is shown for a Hubbard-like onsite interaction and also a long-range interaction.
|
4 |
Weak delocalization due to long-range interaction for two electrons in a random potential chainRömer, R. A., Schreiber, M. 30 October 1998 (has links)
We study two interacting particles in a random potential chain by a transfer matrix method which allows a correct handling of the symmetry of the two- particle wave function, but introduces an artificial ¨bag¨ interaction. The dependence of the two-particle localization length lambta 2on disorder, interaction strength and range is investigated. Our results demonstrate that the recently proposed enhancement of lambta 2 as compared to the results for single particles is vanishingly small for a Hubbard interaction. For longer-range interactions, we observe a small enhancement but with a different disorder dependence than proposed previously.
|
Page generated in 0.0566 seconds