Zeno and anti-Zeno effects in the presence of spin-chain environment
School of Physics and Optoelectronic Technology,
Dalian University of Technology, 116024, Dalian, P.R. China
Revised: 26 June 2009
Published online: 12 September 2009
We investigate the quantum Zeno and anti-Zeno effects in a two-state system coupling to a spin chain environment in transverse magnetic fields. The effective decay rate affected by the environment has been calculated and analyzed. The results show that the Zeno-anti-Zeno transitions can occur in such system, which has a connection with the quantum phase transition in the environment.
PACS: 03.65.Xp – Tunneling, traversal time, quantum Zeno dynamics / 03.65.Yz – Decoherence; open systems; quantum statistical methods / 05.50.+q – Lattice theory and statistics / 05.70.Jk – Critical point phenomena
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009