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- W1977501810 abstract "The longitudinal coupling of a system to the bath usually induces the pure dephasing of the system. In this paper, we study the collective dephasing induced dissipation and decoherence in a coupled-qubit system with a common bath. It is shown that, compared with the case of the same system with independent baths, the interference between the dephasing processes of different qubits induced by the common bath significantly changes the dissipation of the system. For the system of two coupled qubits, the interference leads to a faster decoherence in the non-single-excitation subspaces and a slower dissipation (and decoherence) in the single-excitation subspace. For the system of multiple coupled qubits, we also find the slower dissipation in the single-excitation subspace and obtain the decay rates of the first excited states for different system sizes numerically. All our results on collective dephasing induced dissipation can be explained based on a simple model with Fermi's golden rule." @default.
- W1977501810 created "2016-06-24" @default.
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- W1977501810 date "2015-01-26" @default.
- W1977501810 modified "2023-10-14" @default.
- W1977501810 title "Dissipation and decoherence induced by collective dephasing in a coupled-qubit system with a common bath" @default.
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- W1977501810 doi "https://doi.org/10.1103/physreva.91.013838" @default.
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