Decay of entanglement in coupled,driven systems with bipartite decoherence |
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Authors: | J Li and G S Paraoanu |
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Institution: | 1.Low Temperature Laboratory, Helsinki University of Technology,TKK,Finland |
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Abstract: | We analyze a system of two qubits embedded in two different environments. The qubits are coupled to each other and driven
on-resonance by two external classical sources.
In the secular limit, we obtain exact analytical results for the evolution of the system for several classes of two-qubit
mixed initial states. For Werner states we show that the decay of entanglement does not depend on coupling. For other initial
states with “X"-type density matrices we find that the sudden death time displays a rich dependence on the coupling energy and state parameters
due to the existence of processes of delayed sudden birth of entanglement. |
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Keywords: | |
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