Qubit-environment entanglement outside of pure decoherence: Hyperfine interaction

Article

关键词: SPIN DYNAMICS;    QUANTUM DOTS;    SEPARABILITY;    DISTILLATION;    COHERENCE;    CRITERION;   

DOI  :  10.1103/PhysRevB.107.085428

来源: SCIE

【 摘 要 】

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 timescales.

【 授权许可】

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