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- W2969355317 abstract "We propose a straightforward experimental protocol to test whether qubit-environment entanglement is generated during pure dephasing of a qubit. The protocol is implemented using only measurements and operations on the qubit---it does not involve the measurement of the system-environment state of interest, but the preparation and measurement of the qubit in two simple variations. A difference in the time dependencies of qubit coherence between the two cases testifies to the presence of entanglement in the state of interest. Furthermore, it signifies that the environment-induced noise experienced by the qubit cannot be modeled as a classical stochastic process independent of the qubit state. We demonstrate the operation of this protocol on a realistically modeled nitrogen-vacancy center spin qubit in diamond interacting with a nuclear spin environment, and show that the generation of entanglement should be easily observable in this case." @default.
- W2969355317 created "2019-08-29" @default.
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- W2969355317 date "2019-08-16" @default.
- W2969355317 modified "2023-10-16" @default.
- W2969355317 title "How to detect qubit-environment entanglement generated during qubit dephasing" @default.
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- W2969355317 doi "https://doi.org/10.1103/physreva.100.022318" @default.
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