Journal article
Emulating two qubits with a four-level transmon qudit for variational quantum algorithms
- Abstract:
- Using quantum systems with more than two levels, or qudits, can scale the computational space of quantum processors more efficiently than using qubits, which may offer an easier physical implementation for larger Hilbert spaces. However, individual qudits may exhibit larger noise, and algorithms designed for qubits require to be recompiled to qudit algorithms for execution. In this work, we implemented a two-qubit emulator using a 4-level superconducting transmon qudit for variational quantum algorithm applications and analyzed its noise model. The major source of error for the variational algorithm was readout misclassification error and amplitude damping. To improve the accuracy of the results, we applied error-mitigation techniques to reduce the effects of the misclassification and qudit decay event. The final predicted energy value is within the range of chemical accuracy.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 5.5MB, Terms of use)
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- Publisher copy:
- 10.1088/2058-9565/ad37d4
Authors
+ Engineering and Physical Sciences Research Council
More from this funder
- Funder identifier:
- https://ror.org/0439y7842
- Grant:
- EP/M013243/1
- EP/N015118/1
- EP/M013243/1
- EP/T001062/1
- EP/W027992/1
- Publisher:
- IOP Publishing
- Journal:
- Quantum Science and Technology More from this journal
- Volume:
- 9
- Issue:
- 3
- Article number:
- 035003
- Publication date:
- 2024-04-08
- Acceptance date:
- 2024-03-26
- DOI:
- EISSN:
-
2058-9565
- Language:
-
English
- Keywords:
- Pubs id:
-
1916849
- Local pid:
-
pubs:1916849
- Deposit date:
-
2024-05-31
Terms of use
- Copyright holder:
- Cao et al.
- Copyright date:
- 2024
- Rights statement:
- © 2024 The Author(s). Published by IOP Publishing Ltd. Original Content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
- Licence:
- CC Attribution (CC BY)
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