The Bose–Fermi Kondo model in an exactly solvable limit

✍ Scribed by Jianhui Dai; C.J. Bolech; Qimiao Si

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 121 KB
• Volume: 403
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2007.10.117

✦ Synopsis

The Bose-Fermi Kondo model (BFKM) has a rich phase diagram which is sensitive to w À1 0 ðoÞ / joj 1À , the spectral density of the dissipative bosonic bath. Here, we show that the SUð2Þ BFKM is exactly solvable by the Bethe Ansatz method if the dissipative bosonic bath has a singular spectrum, corresponding to ¼ 2, or w À1 0 ðtÞ ¼ const: The exact solution explicitly demonstrates a destruction of Kondo screening by the coupling to the dissipative bosonic bath.