Tunneling Current Through a Double Quantum Dots System
Electrostatically confined quantum dots in semiconductors hold the promise to achieve high scalability and reliability levels for practical implementation of solid-state qubits where the electrochemical potentials of each quantum dot can be independently controlled by the gate voltages.In this paper...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9828406/ |
| _version_ | 1818469194700685312 |
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| author | Amin Rassekh Majid Shalchian Jean-Michel Sallese Farzan Jazaeri |
| author_facet | Amin Rassekh Majid Shalchian Jean-Michel Sallese Farzan Jazaeri |
| author_sort | Amin Rassekh |
| collection | DOAJ |
| description | Electrostatically confined quantum dots in semiconductors hold the promise to achieve high scalability and reliability levels for practical implementation of solid-state qubits where the electrochemical potentials of each quantum dot can be independently controlled by the gate voltages.In this paper, the current and charge stability diagram of two-well potentials arising from electrostatically defined double quantum dot (DQD) are analytically realized. We propose to apply the Generalized Hubbard model to find the Hamiltonian of the system. The proposed analysis takes the tunnel coupling between the dots, Coulomb interaction, and Zeeman energy arising from an external magnetic field into account. Using quantum master equations to predict the probability of the final states in a DQD system, we study the tunneling current through two quantum dots coupled in series with two conducting leads, and therefore, the charge stability diagram is theoretically investigated. The impact of the tunnel coupling and Zeeman energy on the charge stability diagram is deeply discussed. The validity of the presented analysis is confirmed by experimental data as well as the classical capacitance model. |
| first_indexed | 2024-04-13T21:20:46Z |
| format | Article |
| id | doaj.art-d0ebad5ba3664520809ebcce8b87f0d1 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-04-13T21:20:46Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-d0ebad5ba3664520809ebcce8b87f0d12022-12-22T02:29:30ZengIEEEIEEE Access2169-35362022-01-0110752457525610.1109/ACCESS.2022.31906179828406Tunneling Current Through a Double Quantum Dots SystemAmin Rassekh0https://orcid.org/0000-0002-6219-0458Majid Shalchian1https://orcid.org/0000-0001-9741-0804Jean-Michel Sallese2https://orcid.org/0000-0003-2109-909XFarzan Jazaeri3https://orcid.org/0000-0001-9649-3572Electrical Engineering Department, Amirkabir University of Technology, Tehran, IranElectrical Engineering Department, Amirkabir University of Technology, Tehran, IranElectron Device Modeling and Technology Laboratory (EDLAB), Ecole Polytechnique Federale de Lausanne, Lausanne, SwitzerlandIntegrated Circuits Laboratory (ICLAB), Ecole Polytechnique Federale de Lausanne (EPFL), Neuchatel, SwitzerlandElectrostatically confined quantum dots in semiconductors hold the promise to achieve high scalability and reliability levels for practical implementation of solid-state qubits where the electrochemical potentials of each quantum dot can be independently controlled by the gate voltages.In this paper, the current and charge stability diagram of two-well potentials arising from electrostatically defined double quantum dot (DQD) are analytically realized. We propose to apply the Generalized Hubbard model to find the Hamiltonian of the system. The proposed analysis takes the tunnel coupling between the dots, Coulomb interaction, and Zeeman energy arising from an external magnetic field into account. Using quantum master equations to predict the probability of the final states in a DQD system, we study the tunneling current through two quantum dots coupled in series with two conducting leads, and therefore, the charge stability diagram is theoretically investigated. The impact of the tunnel coupling and Zeeman energy on the charge stability diagram is deeply discussed. The validity of the presented analysis is confirmed by experimental data as well as the classical capacitance model.https://ieeexplore.ieee.org/document/9828406/Double quantum dothubbard modelzeeman energycharge stability diagrammaster equation |
| spellingShingle | Amin Rassekh Majid Shalchian Jean-Michel Sallese Farzan Jazaeri Tunneling Current Through a Double Quantum Dots System IEEE Access Double quantum dot hubbard model zeeman energy charge stability diagram master equation |
| title | Tunneling Current Through a Double Quantum Dots System |
| title_full | Tunneling Current Through a Double Quantum Dots System |
| title_fullStr | Tunneling Current Through a Double Quantum Dots System |
| title_full_unstemmed | Tunneling Current Through a Double Quantum Dots System |
| title_short | Tunneling Current Through a Double Quantum Dots System |
| title_sort | tunneling current through a double quantum dots system |
| topic | Double quantum dot hubbard model zeeman energy charge stability diagram master equation |
| url | https://ieeexplore.ieee.org/document/9828406/ |
| work_keys_str_mv | AT aminrassekh tunnelingcurrentthroughadoublequantumdotssystem AT majidshalchian tunnelingcurrentthroughadoublequantumdotssystem AT jeanmichelsallese tunnelingcurrentthroughadoublequantumdotssystem AT farzanjazaeri tunnelingcurrentthroughadoublequantumdotssystem |