Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session EE03: V: Semiconductor Qubits
10:00 AM–11:24 AM,
Monday, March 20, 2023
Room: Virtual Room 3
Sponsoring
Unit:
DQI
Chair: Biswajit Datta, City university of New York
Abstract: EE03.00004 : Quantum state transfer of hole spin qubits in quantum dots
10:36 AM–10:48 AM
Presenter:
David F Fernández
(Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC))
Authors:
David F Fernández
(Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC))
Yue Ban
(Tecnalia)
Gloria Platero
(CSIC - Madrid)
This work investigates how to control a two-hole spin qubit consisting of a singlet-triplet hole state. For that purpose, we implement a driving protocol based on Shortcuts to Adiabaticity (STA), minimizing noise effects while enhancing robustness [5, 6]. We analyze its feasibility to manipulate hole spin qubits and compare it with other alternative protocols. We can initialize the qubit in an arbitrary state and perform a NOT gate by changing the detuning between dots. In addition, we achieve a SWAP-like two-qubit gate with fidelity beyond the error correction threshold [7]. Finally, we study the long-range transfer of hole spin states across a linear quantum dot array. These protocols will be designed by STA schemes, being able to speed up the transference while maintaining or even increasing the fidelity and robustness against charge noise.
References
[1] D. Jirovec, et al, Nat. Mat. 20, 1106-1112 (2021)
[2] N. W. Hendrickx et al., Nat. Commun. 11, 3478 (2020)
[3] A. Bogan, et al., PRL 118, 167701 (2017)
[4] A. Bogan, et al., PRL 120, 207701 (2018)
[5] Y. Ban, et al., Nanotech. 29, 505201 (2018)
[6] Y. Ban, et al., Adv. Quantum Technol. 2, 1900048 (2018)
[7] D. Fernández-Fernández, et al., arXiv 2204.07453 (2022)
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