DISSIPATIVE DYNAMICS OF A 2-STATE SYSTEM, THE KONDO PROBLEM, AND THE INVERSE-SQUARE ISING-MODEL

Authors
CHAKRAVARTY S RUDNICK J
Citation
S. Chakravarty et J. Rudnick, DISSIPATIVE DYNAMICS OF A 2-STATE SYSTEM, THE KONDO PROBLEM, AND THE INVERSE-SQUARE ISING-MODEL, Physical review letters, 75(3), 1995, pp. 501-504
Citations number
24
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
75
Issue
3
Year of publication
1995
Pages
501 - 504
Database
ISI
SICI code
0031-9007(1995)75:3<501:DDOA2S>2.0.ZU;2-5
Abstract
The dynamics of a two-state system coupled to an Ohmic continuum, the dissipative two-state system, is solved by exploiting its connection t o the Kondo problem and the inverse-square Ising model. Such a system is known to possess a zero temperature quantum critical point. In the quantum disordered phase the asymptotic dynamics is always an incohere nt power-law relaxation. At short times, the system can exhibit damped oscillations only over a limited range of parameters.