Broadband spectroscopy of quantum noise
Fuente:
arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
| Accesso online: | |
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| _version_ | 1866916128032292864 |
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| author | Wang, Yuanlong Paz-Silva, Gerardo A. |
| author_facet | Wang, Yuanlong Paz-Silva, Gerardo A. |
| contents | Characterizing noise is key to the optimal control of the quantum system it affects. Using a single-qubit probe and appropriate sequences of $π$ and non-$π$ pulses, we show how one can characterize the noise a quantum bath generates across a wide range of frequencies -- including frequencies below the limit set by the probe's $\mathbb{T}_2$ time. To do so we leverage an exact expression for the dynamics of the probe in the presence of non-$π$ pulses, and a general inequality between the symmetric (classical) and anti-symmetric (quantum) components of the noise spectrum generated by a Gaussian bath. Simulation demonstrates the effectiveness of our method. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_10438 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Broadband spectroscopy of quantum noise Wang, Yuanlong Paz-Silva, Gerardo A. Quantum Physics Characterizing noise is key to the optimal control of the quantum system it affects. Using a single-qubit probe and appropriate sequences of $π$ and non-$π$ pulses, we show how one can characterize the noise a quantum bath generates across a wide range of frequencies -- including frequencies below the limit set by the probe's $\mathbb{T}_2$ time. To do so we leverage an exact expression for the dynamics of the probe in the presence of non-$π$ pulses, and a general inequality between the symmetric (classical) and anti-symmetric (quantum) components of the noise spectrum generated by a Gaussian bath. Simulation demonstrates the effectiveness of our method. |
| title | Broadband spectroscopy of quantum noise |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2402.10438 |