Quantized charge transport driven by a surface acoustic wave in induced unipolar and bipolar junctions
Surface acoustic waves (SAWs) have been used to transport single electrons across long distances of several hundreds of microns. They can potentially be instrumental in the implementation of scalable quantum processors and quantum repeaters, by facilitating interaction between distant qubits. While...
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Veröffentlicht in: | Physical review. B 2019-12, Vol.100 (24), p.1, Article 245401 |
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creator | Chung, Yousun Hou, Hangtian Son, Seok-Kyun Hsiao, Tzu-Kan Nasir, Ateeq Rubino, Antonio Griffiths, Jonathan P. Farrer, Ian Ritchie, David A. Ford, Christopher J. B. |
description | Surface acoustic waves (SAWs) have been used to transport single electrons across long distances of several hundreds of microns. They can potentially be instrumental in the implementation of scalable quantum processors and quantum repeaters, by facilitating interaction between distant qubits. While most of the work thus far has focused on SAW devices in doped GaAs/AlGaAs heterostructures, we have developed a method of creating lateral p−n junctions in an undoped heterostructure containing a quantum well, with the expected advantages of having reduced charge noise and increased spin-coherence lifetimes due to the lack of dopant scattering centers. We present experimental observations of SAW-driven single-electron quantized current in an undoped GaAs/AlGaAs heterostructure, where single electrons were transported between regions of induced electrons. We also demonstrate pumping of electrons by a SAW across the submicron depleted channel between regions of electrons and holes, and observe light emission at such a lateral p−n junction. Improving the lateral confinement in the junction should make it possible to produce a quantized electron-to-hole current and hence SAW-driven emission of single photons. |
doi_str_mv | 10.1103/PhysRevB.100.245401 |
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B.</creator><creatorcontrib>Chung, Yousun ; Hou, Hangtian ; Son, Seok-Kyun ; Hsiao, Tzu-Kan ; Nasir, Ateeq ; Rubino, Antonio ; Griffiths, Jonathan P. ; Farrer, Ian ; Ritchie, David A. ; Ford, Christopher J. B.</creatorcontrib><description>Surface acoustic waves (SAWs) have been used to transport single electrons across long distances of several hundreds of microns. They can potentially be instrumental in the implementation of scalable quantum processors and quantum repeaters, by facilitating interaction between distant qubits. While most of the work thus far has focused on SAW devices in doped GaAs/AlGaAs heterostructures, we have developed a method of creating lateral p−n junctions in an undoped heterostructure containing a quantum well, with the expected advantages of having reduced charge noise and increased spin-coherence lifetimes due to the lack of dopant scattering centers. We present experimental observations of SAW-driven single-electron quantized current in an undoped GaAs/AlGaAs heterostructure, where single electrons were transported between regions of induced electrons. We also demonstrate pumping of electrons by a SAW across the submicron depleted channel between regions of electrons and holes, and observe light emission at such a lateral p−n junction. Improving the lateral confinement in the junction should make it possible to produce a quantized electron-to-hole current and hence SAW-driven emission of single photons.</description><identifier>ISSN: 2469-9950</identifier><identifier>EISSN: 2469-9969</identifier><identifier>DOI: 10.1103/PhysRevB.100.245401</identifier><language>eng</language><publisher>College Park: American Physical Society</publisher><subject>Acoustic noise ; Aluminum gallium arsenides ; Charge transport ; Coherent scattering ; Gallium arsenide ; Heterostructures ; Light emission ; P-n junctions ; Quantum wells ; Qubits (quantum computing) ; Repeaters ; Single electrons ; Surface acoustic wave devices ; Surface acoustic waves</subject><ispartof>Physical review. 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B.</creatorcontrib><title>Quantized charge transport driven by a surface acoustic wave in induced unipolar and bipolar junctions</title><title>Physical review. B</title><description>Surface acoustic waves (SAWs) have been used to transport single electrons across long distances of several hundreds of microns. They can potentially be instrumental in the implementation of scalable quantum processors and quantum repeaters, by facilitating interaction between distant qubits. While most of the work thus far has focused on SAW devices in doped GaAs/AlGaAs heterostructures, we have developed a method of creating lateral p−n junctions in an undoped heterostructure containing a quantum well, with the expected advantages of having reduced charge noise and increased spin-coherence lifetimes due to the lack of dopant scattering centers. We present experimental observations of SAW-driven single-electron quantized current in an undoped GaAs/AlGaAs heterostructure, where single electrons were transported between regions of induced electrons. We also demonstrate pumping of electrons by a SAW across the submicron depleted channel between regions of electrons and holes, and observe light emission at such a lateral p−n junction. Improving the lateral confinement in the junction should make it possible to produce a quantized electron-to-hole current and hence SAW-driven emission of single photons.</description><subject>Acoustic noise</subject><subject>Aluminum gallium arsenides</subject><subject>Charge transport</subject><subject>Coherent scattering</subject><subject>Gallium arsenide</subject><subject>Heterostructures</subject><subject>Light emission</subject><subject>P-n junctions</subject><subject>Quantum wells</subject><subject>Qubits (quantum computing)</subject><subject>Repeaters</subject><subject>Single electrons</subject><subject>Surface acoustic wave devices</subject><subject>Surface acoustic waves</subject><issn>2469-9950</issn><issn>2469-9969</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNo9UNlKA0EQHETBEPMFvgz4vLHn2GTnUYMXBDzQ56V3ZtZsiLPrHJH49Y4kCg1dXVRXQRFyzmDKGIjLp9UuvNjt9ZQBTLksJbAjMuJypgqlZur4H5dwSiYhrAGAzUDNQY1I-5zQxe7bGqpX6N8tjR5dGHofqfHd1jra7CjSkHyL2lLUfQqx0_QLt5Z2Lo9JOn8n1w39Bj1FZ2hzwOvkdOx6F87ISYubYCeHPSZvtzevi_ti-Xj3sLhaFlpIEQsshamMYBwNcMvzWYqcKgWyikHFmeaNMJlrKtOgtLZSkjWKW2nn89YaMSYXe9_B95_Jhliv--Rdjqy5EJKDAM6ySuxV2vcheNvWg-8-0O9qBvVvp_Vfp5mAet-p-AEsJG13</recordid><startdate>20191202</startdate><enddate>20191202</enddate><creator>Chung, Yousun</creator><creator>Hou, Hangtian</creator><creator>Son, Seok-Kyun</creator><creator>Hsiao, Tzu-Kan</creator><creator>Nasir, Ateeq</creator><creator>Rubino, Antonio</creator><creator>Griffiths, Jonathan P.</creator><creator>Farrer, Ian</creator><creator>Ritchie, David A.</creator><creator>Ford, Christopher J. 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B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Quantized charge transport driven by a surface acoustic wave in induced unipolar and bipolar junctions</atitle><jtitle>Physical review. B</jtitle><date>2019-12-02</date><risdate>2019</risdate><volume>100</volume><issue>24</issue><spage>1</spage><pages>1-</pages><artnum>245401</artnum><issn>2469-9950</issn><eissn>2469-9969</eissn><abstract>Surface acoustic waves (SAWs) have been used to transport single electrons across long distances of several hundreds of microns. They can potentially be instrumental in the implementation of scalable quantum processors and quantum repeaters, by facilitating interaction between distant qubits. 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subjects | Acoustic noise Aluminum gallium arsenides Charge transport Coherent scattering Gallium arsenide Heterostructures Light emission P-n junctions Quantum wells Qubits (quantum computing) Repeaters Single electrons Surface acoustic wave devices Surface acoustic waves |
title | Quantized charge transport driven by a surface acoustic wave in induced unipolar and bipolar junctions |
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