Non-adiabatic charge state transitions in singlet–triplet qubits
In double quantum dot singlet–triplet qubits, the exchange interaction is used in both quantum gate operation and the measurement of the state of the qubit. The exchange can be controlled electronically by applying gate voltage pulses. We simulate the exchange induced charge state transitions in one...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2013-01-01
|
| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/10/103015 |
| _version_ | 1797751788813680640 |
|---|---|
| author | Tuukka Hiltunen Juha Ritala Topi Siro Ari Harju |
| author_facet | Tuukka Hiltunen Juha Ritala Topi Siro Ari Harju |
| author_sort | Tuukka Hiltunen |
| collection | DOAJ |
| description | In double quantum dot singlet–triplet qubits, the exchange interaction is used in both quantum gate operation and the measurement of the state of the qubit. The exchange can be controlled electronically by applying gate voltage pulses. We simulate the exchange induced charge state transitions in one and two singlet–triplet qubit systems using the exact diagonalization method. We find that fast detuning pulses may result in leakage between different singlet charge states. The leakage could cause measurement errors and hinder quantum gate operation for example in the case of the two-qubit Coulomb gate. |
| first_indexed | 2024-03-12T16:53:40Z |
| format | Article |
| id | doaj.art-7403d8c7257f4c17bf6d0b9bac4ebdb7 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:53:40Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-7403d8c7257f4c17bf6d0b9bac4ebdb72023-08-08T11:03:20ZengIOP PublishingNew Journal of Physics1367-26302013-01-01151010301510.1088/1367-2630/15/10/103015Non-adiabatic charge state transitions in singlet–triplet qubitsTuukka Hiltunen0Juha Ritala1Topi Siro2Ari Harju3Department of Applied Physics and Helsinki Institute of Physics, Aalto University School of Science , PO Box 11100, 00076 Aalto, FinlandDepartment of Applied Physics and Helsinki Institute of Physics, Aalto University School of Science , PO Box 11100, 00076 Aalto, FinlandDepartment of Applied Physics and Helsinki Institute of Physics, Aalto University School of Science , PO Box 11100, 00076 Aalto, FinlandDepartment of Applied Physics and Helsinki Institute of Physics, Aalto University School of Science , PO Box 11100, 00076 Aalto, FinlandIn double quantum dot singlet–triplet qubits, the exchange interaction is used in both quantum gate operation and the measurement of the state of the qubit. The exchange can be controlled electronically by applying gate voltage pulses. We simulate the exchange induced charge state transitions in one and two singlet–triplet qubit systems using the exact diagonalization method. We find that fast detuning pulses may result in leakage between different singlet charge states. The leakage could cause measurement errors and hinder quantum gate operation for example in the case of the two-qubit Coulomb gate.https://doi.org/10.1088/1367-2630/15/10/103015 |
| spellingShingle | Tuukka Hiltunen Juha Ritala Topi Siro Ari Harju Non-adiabatic charge state transitions in singlet–triplet qubits New Journal of Physics |
| title | Non-adiabatic charge state transitions in singlet–triplet qubits |
| title_full | Non-adiabatic charge state transitions in singlet–triplet qubits |
| title_fullStr | Non-adiabatic charge state transitions in singlet–triplet qubits |
| title_full_unstemmed | Non-adiabatic charge state transitions in singlet–triplet qubits |
| title_short | Non-adiabatic charge state transitions in singlet–triplet qubits |
| title_sort | non adiabatic charge state transitions in singlet triplet qubits |
| url | https://doi.org/10.1088/1367-2630/15/10/103015 |
| work_keys_str_mv | AT tuukkahiltunen nonadiabaticchargestatetransitionsinsinglettripletqubits AT juharitala nonadiabaticchargestatetransitionsinsinglettripletqubits AT topisiro nonadiabaticchargestatetransitionsinsinglettripletqubits AT ariharju nonadiabaticchargestatetransitionsinsinglettripletqubits |