Coherent coupling between a quantum dot and a donor in silicon
| Autor: | Tammy Pluym, Malcolm S. Carroll, Jason Dominguez, Michel Pioro-Ladrière, Gregory A. Ten Eyck, John King Gamble, Michael Lilly, Joel R. Wendt, N. Tobias Jacobson, Martin Rudolph, Patrick Harvey-Collard |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Science
General Physics and Astronomy FOS: Physical sciences 02 engineering and technology Electron 01 natural sciences Article General Biochemistry Genetics and Molecular Biology Computer Science::Emerging Technologies Quantum mechanics 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Singlet state Quantum information Physics::Chemical Physics 010306 general physics Spin (physics) lcsh:Science Quantum Hyperfine structure Physics Quantum Physics Multidisciplinary Condensed Matter - Mesoscale and Nanoscale Physics General Chemistry 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Quantum dot Qubit lcsh:Q 0210 nano-technology Quantum Physics (quant-ph) |
| Zdroj: | Nature Communications, Vol 8, Iss 1, Pp 1-6 (2017) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Individual donors in silicon chips are used as quantum bits with extremely low error rates. However, physical realizations have been limited to one donor because their atomic size causes fabrication challenges. Quantum dot qubits, in contrast, are highly adjustable using electrical gate voltages. This adjustability could be leveraged to deterministically couple donors to quantum dots in arrays of qubits. In this work, we demonstrate the coherent interaction of a $^{31}$P donor electron with the electron of a metal-oxide-semiconductor quantum dot. We form a logical qubit encoded in the spin singlet and triplet states of the two-electron system. We show that the donor nuclear spin drives coherent rotations between the electronic qubit states through the contact hyperfine interaction. This provides every key element for compact two-electron spin qubits requiring only a single dot and no additional magnetic field gradients, as well as a means to interact with the nuclear spin qubit. Published version |
| Databáze: | OpenAIRE |
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