Modeling low- and high-frequency noise in transmon qubits with resource-efficient measurement
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909286802653184 |
|---|---|
| author | Tripathi, Vinay Chen, Huo Levenson-Falk, Eli Lidar, Daniel A. |
| author_facet | Tripathi, Vinay Chen, Huo Levenson-Falk, Eli Lidar, Daniel A. |
| contents | Transmon qubits experience open system effects that manifest as noise at a broad range of frequencies. We present a model of these effects using the Redfield master equation with a hybrid bath consisting of low and high-frequency components. We use two-level fluctuators to simulate 1/f-like noise behavior, which is a dominant source of decoherence for superconducting qubits. By measuring quantum state fidelity under free evolution with and without dynamical decoupling (DD), we can fit the low- and high-frequency noise parameters in our model. We train and test our model using experiments on quantum devices available through IBM quantum experience. Our model accurately predicts the fidelity decay of random initial states, including the effect of DD pulse sequences. We compare our model with two simpler models and confirm the importance of including both high-frequency and 1/f noise in order to accurately predict transmon behavior. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_00095 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Modeling low- and high-frequency noise in transmon qubits with resource-efficient measurement Tripathi, Vinay Chen, Huo Levenson-Falk, Eli Lidar, Daniel A. Quantum Physics Transmon qubits experience open system effects that manifest as noise at a broad range of frequencies. We present a model of these effects using the Redfield master equation with a hybrid bath consisting of low and high-frequency components. We use two-level fluctuators to simulate 1/f-like noise behavior, which is a dominant source of decoherence for superconducting qubits. By measuring quantum state fidelity under free evolution with and without dynamical decoupling (DD), we can fit the low- and high-frequency noise parameters in our model. We train and test our model using experiments on quantum devices available through IBM quantum experience. Our model accurately predicts the fidelity decay of random initial states, including the effect of DD pulse sequences. We compare our model with two simpler models and confirm the importance of including both high-frequency and 1/f noise in order to accurately predict transmon behavior. |
| title | Modeling low- and high-frequency noise in transmon qubits with resource-efficient measurement |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2303.00095 |