Disentanglement of Qubit in Dephasing Model

XIAO SAN MA, An Min Wang

Florian Förster, G. Petersen, Stephan Manus +5 more

Qing Yang, Yang Ming, Zhuo‐Liang Cao

We investigate the entanglement evolution of two qubits that are initially in Werner state under the classical phase noise. We discuss the influence of mixture degree on disentanglement. It is showed that the more mixed the state, the shorter is the time of disentanglement.

Katarzyna Roszak, Paweł Machnikowski

We study the effect of pure dephasing on the entanglement of a pair of two-level subsystems (qubits). We show that partial dephasing induced by a super-Ohmic reservoir, corresponding to well-established properties of confined charge states and phonons in semiconductors, may lead to complete disentanglement. We show also that the disentanglement effect increases with growing distance between the two subsystems.

Masashi Ban