Decoherence and Entanglement Dynamics in Fluctuating Fields

Details Decoherence and Entanglement Dynamics in Fluctuating Fields Decoherence and Entanglement Dynamics in Fluctuating Fields

2009-12-23

arxiv.org/abs/0912.4654v2

Physical Review A 81, 042314 (2010)

Physics

Quantum Physics

10 pages, 5 figures, added minor changes in order to match published version

Scientific paper

10.1103/PhysRevA.81.042314

We study pure phase damping of two qubits due to fluctuating fields. As frequently employed, decoherence is thus described in terms of random unitary (RU) dynamics, i.e., a convex mixture of unitary transformations. Based on a separation of the dynamics into an average Hamiltonian and a noise channel, we are able to analytically determine the evolution of both entanglement and purity. This enables us to characterize the dynamics in a concurrence-purity (CP) diagram: we find that RU phase damping dynamics sets constraints on accessible regions in the CP plane. We show that initial state and dynamics contribute to final entanglement independently.

Affiliated with

Also associated with

No associations

Rating

Decoherence and Entanglement Dynamics in Fluctuating Fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Decoherence and Entanglement Dynamics in Fluctuating Fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decoherence and Entanglement Dynamics in Fluctuating Fields will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-363481