Mitigating decoherence in hot electron interferometry
Due to their high energy, hot electrons in quantum Hall edge (QHE) states can be considered as single particles that have the potential to be used for quantum optics-like experiments. Unlike photons, however, electrons typically undergo scattering processes in transport, which results in a loss of c...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/abb9e5 |
| _version_ | 1827873039986982912 |
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| author | Lewis A Clark Masaya Kataoka Clive Emary |
| author_facet | Lewis A Clark Masaya Kataoka Clive Emary |
| author_sort | Lewis A Clark |
| collection | DOAJ |
| description | Due to their high energy, hot electrons in quantum Hall edge (QHE) states can be considered as single particles that have the potential to be used for quantum optics-like experiments. Unlike photons, however, electrons typically undergo scattering processes in transport, which results in a loss of coherence and limits their ability to show quantum-coherent behaviour. Here we study theoretically the decoherence mechanisms of hot electrons in a Mach–Zehnder interferometer (MZI), and highlight the role played by both acoustic and optical phonon emission. We discuss optimal choices of experimental parameters and show that high visibilities of ≳ 85% are achievable in hot-electron devices over relatively long distances of 10 μ m. We also discuss energy filtration techniques to remove decoherent electrons and show that this can increase visibilities to over 95%. This represents an improvement over Fermi-level electron quantum optics, and suggests hot-electron charge pumps as a platform for realising quantum-coherent nanoelectronic devices. |
| first_indexed | 2024-03-12T16:31:54Z |
| format | Article |
| id | doaj.art-d568e51f0f1949318f6efe2c08af8fbb |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:31:54Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-d568e51f0f1949318f6efe2c08af8fbb2023-08-08T15:27:40ZengIOP PublishingNew Journal of Physics1367-26302020-01-01221010303110.1088/1367-2630/abb9e5Mitigating decoherence in hot electron interferometryLewis A Clark0https://orcid.org/0000-0002-7074-2777Masaya Kataoka1https://orcid.org/0000-0001-5780-6871Clive Emary2https://orcid.org/0000-0002-9822-8390Joint Quantum Centre Durham-Newcastle, School of Mathematics, Statistics and Physics, Newcastle University , Newcastle upon Tyne NE1 7RU, United KingdomNational Physical Laboratory , Hampton Road, Teddington, Middlesex TW11 0LW, United KingdomJoint Quantum Centre Durham-Newcastle, School of Mathematics, Statistics and Physics, Newcastle University , Newcastle upon Tyne NE1 7RU, United KingdomDue to their high energy, hot electrons in quantum Hall edge (QHE) states can be considered as single particles that have the potential to be used for quantum optics-like experiments. Unlike photons, however, electrons typically undergo scattering processes in transport, which results in a loss of coherence and limits their ability to show quantum-coherent behaviour. Here we study theoretically the decoherence mechanisms of hot electrons in a Mach–Zehnder interferometer (MZI), and highlight the role played by both acoustic and optical phonon emission. We discuss optimal choices of experimental parameters and show that high visibilities of ≳ 85% are achievable in hot-electron devices over relatively long distances of 10 μ m. We also discuss energy filtration techniques to remove decoherent electrons and show that this can increase visibilities to over 95%. This represents an improvement over Fermi-level electron quantum optics, and suggests hot-electron charge pumps as a platform for realising quantum-coherent nanoelectronic devices.https://doi.org/10.1088/1367-2630/abb9e5electron quantum opticsmesoscopicselectron transportquantum Hall effectelectron interferometry |
| spellingShingle | Lewis A Clark Masaya Kataoka Clive Emary Mitigating decoherence in hot electron interferometry New Journal of Physics electron quantum optics mesoscopics electron transport quantum Hall effect electron interferometry |
| title | Mitigating decoherence in hot electron interferometry |
| title_full | Mitigating decoherence in hot electron interferometry |
| title_fullStr | Mitigating decoherence in hot electron interferometry |
| title_full_unstemmed | Mitigating decoherence in hot electron interferometry |
| title_short | Mitigating decoherence in hot electron interferometry |
| title_sort | mitigating decoherence in hot electron interferometry |
| topic | electron quantum optics mesoscopics electron transport quantum Hall effect electron interferometry |
| url | https://doi.org/10.1088/1367-2630/abb9e5 |
| work_keys_str_mv | AT lewisaclark mitigatingdecoherenceinhotelectroninterferometry AT masayakataoka mitigatingdecoherenceinhotelectroninterferometry AT cliveemary mitigatingdecoherenceinhotelectroninterferometry |