Qubit-environment entanglement outside of pure decoherence: Hyperfine interaction

0571605 - FZÚ 2024 RIV US eng J - Článek v odborném periodiku
Salamon, T. - Plodzien, M. - Lewenstein, M. - Roszak, Katarzyna
Qubit-environment entanglement outside of pure decoherence: Hyperfine interaction.
Physical Review B. Roč. 107, č. 8 (2023), č. článku 085428. ISSN 2469-9950. E-ISSN 2469-9969
Institucionální podpora: RVO:68378271
Klíčová slova: qubit-environment entanglement * decoherence * hyperfine interaction * spin qubits * quantum dots
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 3.7, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevB.107.085428

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.
Trvalý link: https://hdl.handle.net/11104/0346803