2015/12/05 by Patrick Harvey-Collard, N. Tobias Jacobson, Martin Rudolph +9 · 1 citation
Chemistry · Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Chemistry #Condensed matter physics #Coupling (piping) #Electron #Flux qubit #Hyperfine structure #Materials science #Optoelectronics #Physics #Quantum #Quantum and electron transport phenomena #Quantum computer #Quantum dot #Quantum information #Quantum mechanics #Quantum point contact #Quantum well #Qubit #Semiconductor Quantum Structures and Devices #Semiconductor materials and devices #Spin (aerodynamics) #Spin engineering #Spin polarization #Spins #Superconducting quantum computing #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1038/s41467-017-01113-2
published as Nature Communications 8, 1029 (2017) · Published version
openalex publication_date 2015/12/05 · arxiv created 2017/10/18 · arxiv updated 2017/10/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Silicon chips hosting a single donor can be used to store and manipulate one bit of quantum information. However, a central challenge for realizing quantum logic operations is to couple donors to one another in a controllable way. To achieve this, several proposals rely on using nearby quantum dots (QDs) to mediate an interaction. In this work, we demonstrate the coherent coupling of electron spins between a single 31 P donor and an enriched 28 Si metal-oxide-semiconductor few-electron QD. We show that the electron-nuclear spin interaction on the donor can drive coherent rotations between singlet and triplet electron spin states of the QD-donor system. Moreover, we are able to tune electrically the exchange interaction between the QD and donor electrons. Furthermore, the combination of single-nucleus-driven rotations and voltage-tunable exchange provides every key element for future all-electrical control of spin qubits, while requiring only a single QD and no additional magnetic field gradients