Manipulation of sudden death of entanglement (ESD) of two qubits interacting with statistically uncorrelated thermal reservoirs is investigated. It is shown that for initially prepared X-states of the two qubits a simple (necessary and sufficient) criterion for ESD can be derived with the help of the Peres-Horodecki criterion. It is shown analytically that, in contrast to the zero-temperature case, at finite temperature of at least one of the reservoirs all initially prepared two-qubit X-states exhibit ESD. General conditions are derived under which ESD can be hastened, delayed or averted. © 2009 IOP Publishing Ltd.
Publication Source (Journal or Book title)
Journal of Physics B: Atomic, Molecular and Optical Physics
Ali, M., Alber, G., & Rau, A. (2009). Manipulating entanglement sudden death of two-qubit X-states in zero- and finite-temperature reservoirs. Journal of Physics B: Atomic, Molecular and Optical Physics, 42 (2) https://doi.org/10.1088/0953-4075/42/2/025501