Coherent creation and destruction of orbital wavepackets in Si:P with electrical and optical read-out
| Autor: | Konstantin Litvinenko, Britta Redlich, Gabriel Aeppli, Juerong Li, B. N. Murdin, C. R. Pidgeon, A. F. G. van der Meer, B. J. Villis, M. Pang, Guy Matmon, N. Stavrias, P. T. Greenland, E. T. Bowyer, Russell M. Gwilliam |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Multidisciplinary Spins General Physics and Astronomy 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Corrigenda 01 natural sciences 7. Clean energy Article General Biochemistry Genetics and Molecular Biology Quantum technology Quantum dot Quantum state 0103 physical sciences Atom Orbital motion FELIX Atomic physics 010306 general physics 0210 nano-technology Wave function GeneralLiterature_REFERENCE(e.g. dictionaries encyclopedias glossaries) Quantum computer |
| Zdroj: | Nature Communications, 6 Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | The ability to control dynamics of quantum states by optical interference, and subsequent electrical read-out, is crucial for solid state quantum technologies. Ramsey interference has been successfully observed for spins in silicon and nitrogen vacancy centres in diamond, and for orbital motion in InAs quantum dots. Here we demonstrate terahertz optical excitation, manipulation and destruction via Ramsey interference of orbital wavepackets in Si:P with electrical read-out. We show milliradian control over the wavefunction phase for the two-level system formed by the 1s and 2p states. The results have been verified by all-optical echo detection methods, sensitive only to coherent excitations in the sample. The experiments open a route to exploitation of donors in silicon for atom trap physics, with concomitant potential for quantum computing schemes, which rely on orbital superpositions to, for example, gate the magnetic exchange interactions between impurities. Impurity spins in silicon can be controlled with microwaves and then read-out electrically, offering a promising platform for quantum information applications. Here, the authors show that terahertz pulses can be used to address the orbital degree of freedom as well, which can also be detected electrically. |
| Databáze: | OpenAIRE |
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