التفاصيل البيبلوغرافية
| العنوان: |
High fidelity resonant gating of a silicon based quantum dot hybrid qubit |
| المؤلفون: |
Max G. Lagally, Daniel R. Ward, Susan Coppersmith, Mark Friesen, Mark A. Eriksson, Christie Simmons, Donald E. Savage, Dohun Kim |
| بيانات النشر: |
arXiv, 2015. |
| سنة النشر: |
2015 |
| مصطلحات موضوعية: |
Physics, Bloch sphere, Rabi cycle, Condensed Matter - Mesoscale and Nanoscale Physics, Computer Networks and Communications, FOS: Physical sciences, Statistical and Nonlinear Physics, 02 engineering and technology, Electron, 021001 nanoscience & nanotechnology, 01 natural sciences, 3. Good health, Computer Science::Emerging Technologies, Computational Theory and Mathematics, Quantum dot, Quantum mechanics, Qubit, Quantum process, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Computer Science (miscellaneous), 010306 general physics, 0210 nano-technology, Quantum tunnelling, Coherence (physics) |
| الوصف: |
Isolated spins in semiconductors provide a promising platform to explore quantum mechanical coherence and develop engineered quantum systems. Silicon has attracted great interest as a host material for developing spin qubits because of its weak spin-orbit coupling and hyperfine interaction, and several architectures based on gate defined quantum dots have been proposed and demonstrated experimentally. Recently, a quantum dot hybrid qubit formed by three electrons in double quantum dot was proposed, and non-adiabatic pulsed-gate operation was implemented experimentally, demonstrating simple and fast electrical manipulations of spin states with a promising ratio of coherence time to manipulation time. However, the overall gate fidelity of the pulse-gated hybrid qubit is limited by relatively fast dephasing due to charge noise during one of the two required gate operations. Here we perform the first microwave-driven gate operations of a quantum dot hybrid qubit, avoiding entirely the regime in which it is most sensitive to charge noise. Resonant detuning modulation along with phase control of the microwaves enables a pi rotation time of less than 5 ns (50 ps) around X(Z)-axis with high fidelities > 93 (96) %. We also implement Hahn echo and Carr-Purcell (CP) dynamic decoupling sequences with which we demonstrate a coherence time of over 150 ns. We further discuss a pathway to improve gate fidelity to above 99 %, exceeding the threshold for surface code based quantum error correction.
9 pages and 6 figures including supplementary information |
| DOI: |
10.48550/arxiv.1502.03156 |
| URL الوصول: |
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::395a1808ce85a14e483ec9fea3203376 |
| Rights: |
OPEN |
| رقم الانضمام: |
edsair.doi.dedup.....395a1808ce85a14e483ec9fea3203376 |
| قاعدة البيانات: |
OpenAIRE |