Revealing the quantum nature of memory in non-Markovian dynamics on IBM Quantum
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915951315779584 |
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| author | Bäcker, Charlotte Palaparthy, Krishna Strunz, Walter T. |
| author_facet | Bäcker, Charlotte Palaparthy, Krishna Strunz, Walter T. |
| contents | We investigate memory effects in non-Markovian dynamics on superconducting quantum processors provided by IBM Quantum. We use a collision-model approach to implement suitable single- and two-qubit dynamics with a gate-based quantum circuit. Coupling the system of interest to an ancilla allows for a characterization of the process with respect to non-Markovian memory effects in general, as well as concerning the quantumness of that memory. We demonstrate that current noisy quantum hardware is capable of verifying quantum memory in single-qubit dynamics. We then discuss why a generalization of this dynamics to the two-qubit case cannot directly be simulated in a way that allows quantum memory to be observed. Nevertheless, we present an alternative toy example that demonstrates how quantum memory of two-qubit dynamics can be witnessed using current noisy quantum computers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_19522 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Revealing the quantum nature of memory in non-Markovian dynamics on IBM Quantum Bäcker, Charlotte Palaparthy, Krishna Strunz, Walter T. Quantum Physics We investigate memory effects in non-Markovian dynamics on superconducting quantum processors provided by IBM Quantum. We use a collision-model approach to implement suitable single- and two-qubit dynamics with a gate-based quantum circuit. Coupling the system of interest to an ancilla allows for a characterization of the process with respect to non-Markovian memory effects in general, as well as concerning the quantumness of that memory. We demonstrate that current noisy quantum hardware is capable of verifying quantum memory in single-qubit dynamics. We then discuss why a generalization of this dynamics to the two-qubit case cannot directly be simulated in a way that allows quantum memory to be observed. Nevertheless, we present an alternative toy example that demonstrates how quantum memory of two-qubit dynamics can be witnessed using current noisy quantum computers. |
| title | Revealing the quantum nature of memory in non-Markovian dynamics on IBM Quantum |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.19522 |