Charge-Noise Resilience of Two-Electron Quantum Dots in Si/SiGe Heterostructures

Autor:	Susan Coppersmith, Mark Friesen, Haşim Ekmel Ercan
Rok vydání:	2021
Předmět:	Quantum Physics Condensed Matter - Mesoscale and Nanoscale Physics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) General Physics and Astronomy FOS: Physical sciences Quantum Physics (quant-ph)
Zdroj:	Physical review letters. 128(24)
ISSN:	1079-7114
Popis:	The valley degree of freedom presents challenges and opportunities for silicon spin qubits. An important consideration for singlet-triplet states is the presence of two distinct triplets, comprised of valley vs. orbital excitations. Here we show that both of these triplets are present in the typical operating regime, but that only the valley-excited triplet offers intrinsic protection against charge noise. We further show that this protection arises naturally in dots with stronger confinement. These results reveal an inherent advantage for silicon-based multi-electron qubits. Comment: 6 pages, 5 figures
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::142fba96ceba90546bb1eb0fe6544856 https://pubmed.ncbi.nlm.nih.gov/35776472 Zobrazit plný text záznamu