TY - JOUR AU - Relaño Pérez, Armando AU - Arias, J. M. AU - Dukelsky, J. AU - García Ramos, J. E. AU - Pérez Fernández, P. PY - 2008 DO - 10.1103/PhysRevA.78.060102 SN - 1050-2947 UR - https://hdl.handle.net/20.500.14352/51266 T2 - Physical Review A AB - We analyze the decoherence induced on a single qubit by the interaction with a two-level boson system with critical internal dynamics. We explore how the decoherence process is affected by the presence of quantum phase transitions in the environment.... LA - eng PB - American Physical Society KW - Lipkin Model KW - Systems TI - Decoherence as a signature of an excited-state quantum phase transition TY - journal article VL - 78 ER -