Publication: Connection between decoherence and excited state quantum phase transitions
Full text at PDC
Pérez Fernández, P.
Arias, J. M.
García Ramos, J. E.
Advisors (or tutors)
American Institute of Physics (AIP)
In this work we explore the relationship between an excited state quantum phase transition (ESQPT) and the phenomenon of quantum decoherence. For this purpose, we study how the decoherence is affected by the presence of a continuous ESQPT in the environment. This one is modeled as a two level boson system described by a Lipkin Hamiltonian. We will show that the decoherence of the system is maximal when the environment undergoes a continuous ESQPT.
© 2010 American Institute of Physics. La Rabida 2009: International Scientific Meeting on Nuclear Physics: Basic Concepts in Nuclear Physics: Theory, Experiments, And Applications (2009. La Rábida (España).
1. A. Relaño, J. M. Arias, J. Dukelsky, J. E. García-Ramos, and P. Pérez-Fernández, Phys. Rev. A 78, 060102(R) (2008). 2. P. Pérez-Fernández, A. Relaño, J. M. Arias, J. Dukelsky, and J. E. García-Ramos. Submitted to Physical Review A.