Physics – Quantum Physics
Scientific paper
2001-09-03
Phys.Rev. A65 (2002) 042328
Physics
Quantum Physics
14 pages, 6 figures. Minor changes. To appear in Phys. Rev. A
Scientific paper
10.1103/PhysRevA.65.042328
We consider the environment-affected dynamics of $N$ self-interacting particles living in one-dimensional double wells. Two topics are dealt with. First, we consider the production of entangled states of two-level systems. We show that by adiabatically varying the well biases we may dynamically generate maximally entangled states, starting from initially unentangled product states. Entanglement degradation due to a common type of environmental influence is then computed by solving a master equation. However, we also demonstrate that entanglement production is unaffected if the system-environment coupling is of the type that induces ``motional narrowing''. As our second but related topic, we construct a different master equation that seamlessly merges error protection/detection dynamics for quantum information with the environmental couplings responsible for producing the errors in the first place. Adiabatic avoided crossing schemes are used in both topics.
Bell Nicole F.
Sawyer Raymond F.
Volkas Raymond R.
Wong Yvonne Y. Y.
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