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A single-hole spin qubit
- Source :
- Nature Communications, Vol 11, Iss 1, Pp 1-6 (2020), Nature Communications, 11(1), Nature Communications
- Publication Year :
- 2019
- Publisher :
- Delft, The Netherlands: TNO, 2019.
-
Abstract
- Qubits based on quantum dots have excellent prospects for scalable quantum technology due to their inherent compatibility with standard semiconductor manufacturing. While early on it was recognized that holes may offer a multitude of favourable properties for fast and scalable quantum control, research thus far has remained almost exclusively restricted to the simpler electron system. However, recent developments with holes have led to separate demonstrations of single-shot readout and fast quantum logic, albeit only in the multi-hole regime. Here, we establish a single-hole spin qubit in germanium and demonstrate the integration of single-shot readout and quantum control. Moreover, we make use of Pauli spin blockade, allowing to arbitrarily set the qubit resonance frequency, while providing large readout windows. We deplete a planar germanium double quantum dot to the last hole, confirmed by radio-frequency reflectrometry charge sensing, and achieve single-shot spin readout. To demonstrate the integration of the readout and qubit operation, we show Rabi driving on both qubits and find remarkable electric control over their resonance frequencies. Finally, we analyse the spin relaxation time, which we find to exceed one millisecond, setting the benchmark for hole-based spin qubits. The ability to coherently manipulate a single hole spin underpins the quality of strained germanium and defines an excellent starting point for the construction of novel quantum hardware.<br />Comment: 6 pages, 4 figures
- Subjects :
- Quantum information
Science
General Physics and Astronomy
FOS: Physical sciences
High Tech Systems & Materials
02 engineering and technology
01 natural sciences
Article
General Biochemistry, Genetics and Molecular Biology
Quantum logic
symbols.namesake
Pauli exclusion principle
Quantum mechanics
0103 physical sciences
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
010306 general physics
lcsh:Science
Quantum
Physics
Millisecond
Multidisciplinary
Industrial Innovation
Condensed Matter - Mesoscale and Nanoscale Physics
Quantum dots
Resonance
General Chemistry
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
021001 nanoscience & nanotechnology
Quantum technology
Quantum dot
Qubit
symbols
Condensed Matter::Strongly Correlated Electrons
lcsh:Q
0210 nano-technology
Qubits
Subjects
Details
- Language :
- English
- ISSN :
- 20411723
- Database :
- OpenAIRE
- Journal :
- Nature Communications, Vol 11, Iss 1, Pp 1-6 (2020), Nature Communications, 11(1), Nature Communications
- Accession number :
- edsair.doi.dedup.....d8821574805b901c064fc3435c821c35