Description: Nature of order from random two-body interactions

This title appears in the Scientific Report : 2001

Nature of order from random two-body interactions

We investigate the origin of order in the low-lying spectra of many-body systems with random two-body interactions. Our study based both on analytical as well as on numerical arguments shows that except for the most J-stretched states, the ground states in the higher J-sectors are more orderly and d...

Personal Name(s):	Drozdz, S.
	Wojcik, M.
Contributing Institute:	Institut 3 (Theoretische Kernphysik); IKP-3
Published in:	Physica / A, 301 (2001) S. 291
Imprint:	Amsterdam North Holland Publ. Co. 2001
Physical Description:	291
Document Type:	Journal Article
Research Program:	Theoretische Kernphysik
Series Title:	Physica A 301
Subject (ZB):	J complex systems Random matrix theory order versus chaos
	Publikationsportal JuSER

We investigate the origin of order in the low-lying spectra of many-body systems with random two-body interactions. Our study based both on analytical as well as on numerical arguments shows that except for the most J-stretched states, the ground states in the higher J-sectors are more orderly and develop larger energy gaps than the ones in the J = 0-sector. Due to different characteristic energy scales in different J-sectors the J = 0 ground states may predominate only when all the states are taken together. (C) 2001 Elsevier Science B.V. All rights reserved.