Improving Transmon Qudit Measurement on IBM Quantum Hardware
Fuente:
arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| Acceso en línea: | |
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| _version_ | 1866910301868261376 |
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| author | Kehrer, Tobias Nadolny, Tobias Bruder, Christoph |
| author_facet | Kehrer, Tobias Nadolny, Tobias Bruder, Christoph |
| contents | The Hilbert space of a physical qubit typically features more than two energy levels. Using states outside the qubit subspace can provide advantages in quantum computation. To benefit from these advantages, individual states of the $d$-dimensional qudit Hilbert space have to be discriminated during readout. We propose and analyze two measurement strategies that improve the distinguishability of transmon qudit states. Based on a model describing the readout of a transmon qudit coupled to a resonator, we identify the regime in hardware parameter space where each strategy is optimal. We discuss these strategies in the context of a practical implementation of the default measurement of a ququart on IBM Quantum hardware whose states are prepared by employing higher-order $X$ gates that make use of two-photon transitions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_13504 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Improving Transmon Qudit Measurement on IBM Quantum Hardware Kehrer, Tobias Nadolny, Tobias Bruder, Christoph Quantum Physics The Hilbert space of a physical qubit typically features more than two energy levels. Using states outside the qubit subspace can provide advantages in quantum computation. To benefit from these advantages, individual states of the $d$-dimensional qudit Hilbert space have to be discriminated during readout. We propose and analyze two measurement strategies that improve the distinguishability of transmon qudit states. Based on a model describing the readout of a transmon qudit coupled to a resonator, we identify the regime in hardware parameter space where each strategy is optimal. We discuss these strategies in the context of a practical implementation of the default measurement of a ququart on IBM Quantum hardware whose states are prepared by employing higher-order $X$ gates that make use of two-photon transitions. |
| title | Improving Transmon Qudit Measurement on IBM Quantum Hardware |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2307.13504 |