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- W4225580376 abstract "For a wide range of nonclassical magnonic states that have been proposed and demonstrated recently, a new time scale besides the magnon lifetime - the magnon dephasing time - becomes important, but this time scale is rarely studied. Considering exchange interaction and spin-phonon coupling, we evaluate the pure magnon dephasing time and find it to be smaller than the magnon lifetime at temperatures of a few Kelvins. By examining a magnonic cat state as an example, we show how pure dephasing of magnons destroys and limits the survival of quantum superpositions. Thus it will be critical to perform quantum operations within the pure dephasing time. We further derive the master equation for the density matrix describing such magnonic quantum states taking into account the role of pure dephasing, whose methodology can be generalized to include additional dephasing channels that experiments are likely to encounter in the future. Our findings enable one to design and manipulate robust quantum states of magnons for information processing." @default.
- W4225580376 created "2022-05-05" @default.
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- W4225580376 date "2022-09-12" @default.
- W4225580376 modified "2023-10-15" @default.
- W4225580376 title "Pure dephasing of magnonic quantum states" @default.
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- W4225580376 doi "https://doi.org/10.1103/physrevb.106.l100403" @default.
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