Qubit-environment entanglement outside of pure decoherence: hyperfine interaction

• URL: http://arxiv.org/abs/2210.10553v1
• Date: Wed, 19 Oct 2022 13:52:49 GMT
• Title: Qubit-environment entanglement outside of pure decoherence: hyperfine interaction
• Authors: Tymoteusz Salamon, Marcin P{\l}odzie\'n, Maciej Lewenstein, and Katarzyna Roszak
• Abstract summary: We study the qubit-environment entanglement using negativity as its measure. We study the effect of the magnetic field on qubit-environment disentangling time scales.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In spin-based architectures of quantum devices, the hyperfine interaction between the electron spin qubit and the nuclear spin environment remains one of the main sources of decoherence. This paper provides a short review of the current advances in the theoretical description of the qubit decoherence dynamics. Next, we study the qubit-environment entanglement using negativity as its measure. For an initial maximally mixed state of the environment, we study negativity dynamics as a function of environment size, changing the numbers of environmental nuclei and the total spin of the nuclei. Furthermore, we study the effect of the magnetic field on qubit-environment disentangling time scales.

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