CRITICAL-BEHAVIOR FOR CORRELATED STRONGLY COUPLED BOSON SYSTEMS IN 1+1 DIMENSIONS

Authors
BOGOLIUBOV NM BULLOUGH RK TIMONEN J
Citation
Nm. Bogoliubov et al., CRITICAL-BEHAVIOR FOR CORRELATED STRONGLY COUPLED BOSON SYSTEMS IN 1+1 DIMENSIONS, Physical review letters, 72(25), 1994, pp. 3933-3936
Citations number
31
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
72
Issue
25
Year of publication
1994
Pages
3933 - 3936
Database
ISI
SICI code
0031-9007(1994)72:25<3933:CFCSCB>2.0.ZU;2-2
Abstract
The natural integrable correlated strongly coupled boson system in 1 1 dimensions is the q-boson hopping model; we calculate its critical exponent theta and determine its correlation functions. For small coup lings the q-boson model has natural connections with the Bose gas and the XY models of very large spin for which theta's and correlators are reported. For large couplings the hopping model is a new phase of int eracting bosons substantially different from the impenetrable Bose gas .