Entanglement generation via power-of-swap operations between dynamic electron-spin qubits
Surface acoustic waves (SAWs) can create moving quantum dots in piezoelectric materials. Here we show how electron-spin qubits located on dynamic quantum dots can be entangled. Previous theoretical and numerical models of quantum-dot entanglement generation have been insufficient to study quantum dy...
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| Format: | Article |
| Language: | English |
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American Physical Society
2020
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| Online Access: | https://hdl.handle.net/1721.1/124617 |
| _version_ | 1826188289283981312 |
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| author | Arvidsson Shukur, David Roland |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Arvidsson Shukur, David Roland |
| author_sort | Arvidsson Shukur, David Roland |
| collection | MIT |
| description | Surface acoustic waves (SAWs) can create moving quantum dots in piezoelectric materials. Here we show how electron-spin qubits located on dynamic quantum dots can be entangled. Previous theoretical and numerical models of quantum-dot entanglement generation have been insufficient to study quantum dynamics in realistic experimental devices. We utilize state-of-the-art graphics processing units to simulate the wave-function dynamics of two electrons carried by a SAW through a two-dimensional semiconductor heterostructure. We build a methodology to implement a power-of-swap gate via the Coulomb interaction. A benefit of the SAW architecture is that it provides a coherent way of transporting the qubits through an electrostatic potential. This architecture allows us to avoid problems associated with fast control pulses and guarantees operation consistency, providing an advantage over static qubits. For interdot barrier heights where the double occupation energy is sufficiently greater than the double-dot hopping energy, we find that parameters based on experiments in GaAs/AlGaAs heterostructures can produce a high-fidelity root-of-swap operation. Our results provide a methodology for a crucial component of dynamic-qubit quantum computing. ©2020 |
| first_indexed | 2024-09-23T07:57:24Z |
| format | Article |
| id | mit-1721.1/124617 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T07:57:24Z |
| publishDate | 2020 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1246172024-06-20T14:47:37Z Entanglement generation via power-of-swap operations between dynamic electron-spin qubits Arvidsson Shukur, David Roland Massachusetts Institute of Technology. Department of Mechanical Engineering Surface acoustic waves (SAWs) can create moving quantum dots in piezoelectric materials. Here we show how electron-spin qubits located on dynamic quantum dots can be entangled. Previous theoretical and numerical models of quantum-dot entanglement generation have been insufficient to study quantum dynamics in realistic experimental devices. We utilize state-of-the-art graphics processing units to simulate the wave-function dynamics of two electrons carried by a SAW through a two-dimensional semiconductor heterostructure. We build a methodology to implement a power-of-swap gate via the Coulomb interaction. A benefit of the SAW architecture is that it provides a coherent way of transporting the qubits through an electrostatic potential. This architecture allows us to avoid problems associated with fast control pulses and guarantees operation consistency, providing an advantage over static qubits. For interdot barrier heights where the double occupation energy is sufficiently greater than the double-dot hopping energy, we find that parameters based on experiments in GaAs/AlGaAs heterostructures can produce a high-fidelity root-of-swap operation. Our results provide a methodology for a crucial component of dynamic-qubit quantum computing. ©2020 Hitachi (grant no. RG94632) Hitachi (grant no. RG78643) Engineering and Physical Sciences Research Council (award no. 1948709) Engineering and Physical Sciences Research Council (research grant no. 90413/18715) 2020-04-14T14:33:51Z 2020-04-14T14:33:51Z 2020-02-24 2019-10 2020-02-24T16:13:39Z Article http://purl.org/eprint/type/JournalArticle 2469-9934 2469-9926 https://hdl.handle.net/1721.1/124617 Lepage, Hugo V., Aleksander A. Lasek, David R. M. Arvidsson-Shukur, and Crispin H. W. Barnes, "Entanglement generation via power-of-swap operations between dynamic electron-spin qubits." Physical review A 101, 2 (February 2020): no. 022329 ©2020 Author(s) en http://dx.doi.org/10.1103/PhysRevA.101.022329 Physical review A Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Arvidsson Shukur, David Roland Entanglement generation via power-of-swap operations between dynamic electron-spin qubits |
| title | Entanglement generation via power-of-swap operations between dynamic electron-spin qubits |
| title_full | Entanglement generation via power-of-swap operations between dynamic electron-spin qubits |
| title_fullStr | Entanglement generation via power-of-swap operations between dynamic electron-spin qubits |
| title_full_unstemmed | Entanglement generation via power-of-swap operations between dynamic electron-spin qubits |
| title_short | Entanglement generation via power-of-swap operations between dynamic electron-spin qubits |
| title_sort | entanglement generation via power of swap operations between dynamic electron spin qubits |
| url | https://hdl.handle.net/1721.1/124617 |
| work_keys_str_mv | AT arvidssonshukurdavidroland entanglementgenerationviapowerofswapoperationsbetweendynamicelectronspinqubits |