Pauli blockade catalogue and three- and four-particle Kondo effect in bilayer graphene quantum dots
Year: 2024
Type: article
Abstract: Pauli blockade is a fundamental quantum phenomenon that also serves as a powerful tool for qubit manipulation and readout. While most systems exhibit a simple even-odd pattern of double-dot Pauli spin blockade due to the preferred singlet pairing of spins, the additional valley degree of freedom offered by bilayer graphene greatly alters this pattern. Inspecting bias-triangle measurements at double-dot charge degeneracies with up to four electrons in each dot reveals a much richer double-dot Pauli blockade catalog with both spin and/or valley blockade. In addition, we use single-dot Kondo effect measurements to substantiate our understanding of the three- and four-particle state spectra by analyzing their magnetic field dependence. With high controllability and reported long valley- and spin-relaxation times, bilayer graphene is a rising platform for hosting semiconductor quantum dot qubits. A thorough understanding of state spectra is crucial for qubit design and manipulation, and the rich Pauli blockade catalog provides an abundance of qubit operational possibilities and opportunities to explore intriguing spin and valley physics. Published by the American Physical Society 2024
Source: Physical Review Research
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,625
Funders: National Science Foundation, Japan Society for the Promotion of Science London, European Commission, Ministry of Education, Culture, Sports, Science and Technology, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Japan Society for the Promotion of Science, National Center of Competence in Research Quantum Science and Technology, H2020 European Research Council, H2020 Marie Skłodowska-Curie Actions
Awards: QUantum Electronics Science and TECHnology training, G2172773418, G2779214953, G2868987701, G3188738659, NCCR QSIT: Quantum Science and Technology, G3612435878, G4226639475, G434337789, G4636866504, G4703715196, Entropy in engineered quantum systems - Mesoscopic thermodynamics of correlated quantum states, G4988255245, G6186848324, 糖化合物の CMR, Pmr, CD, ORD による立体構造解析の研究, G8158323310, Toward new era of quantum electrical measurements through phase slips, G8334902734, QUantum Electronics Science and TECHnology training
OpenAlex ID: W4390739704