Quantum turnstiles for robust measurement of full counting statistics
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866912173468418048 |
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| author | Samajdar, Rhine McCulloch, Ewan Khemani, Vedika Vasseur, Romain Gopalakrishnan, Sarang |
| author_facet | Samajdar, Rhine McCulloch, Ewan Khemani, Vedika Vasseur, Romain Gopalakrishnan, Sarang |
| contents | We present a scalable protocol for measuring full counting statistics (FCS) in experiments or tensor-network simulations. In this method, an ancilla in the middle of the system acts as a turnstile, with its phase keeping track of the time-integrated particle flux. Unlike quantum gas microscopy, the turnstile protocol faithfully captures FCS starting from number-indefinite initial states or in the presence of noisy dynamics. In addition, by mapping the FCS onto a single-body observable, it allows for stable numerical calculations of FCS using approximate tensor-network methods. We demonstrate the wide-ranging utility of this approach by computing the FCS of the transferred magnetization in a Floquet Heisenberg spin chain, as studied in a recent experiment with superconducting qubits, as well as the FCS of charge transfer in random circuits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_15464 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Quantum turnstiles for robust measurement of full counting statistics Samajdar, Rhine McCulloch, Ewan Khemani, Vedika Vasseur, Romain Gopalakrishnan, Sarang Quantum Physics Quantum Gases Statistical Mechanics Strongly Correlated Electrons We present a scalable protocol for measuring full counting statistics (FCS) in experiments or tensor-network simulations. In this method, an ancilla in the middle of the system acts as a turnstile, with its phase keeping track of the time-integrated particle flux. Unlike quantum gas microscopy, the turnstile protocol faithfully captures FCS starting from number-indefinite initial states or in the presence of noisy dynamics. In addition, by mapping the FCS onto a single-body observable, it allows for stable numerical calculations of FCS using approximate tensor-network methods. We demonstrate the wide-ranging utility of this approach by computing the FCS of the transferred magnetization in a Floquet Heisenberg spin chain, as studied in a recent experiment with superconducting qubits, as well as the FCS of charge transfer in random circuits. |
| title | Quantum turnstiles for robust measurement of full counting statistics |
| topic | Quantum Physics Quantum Gases Statistical Mechanics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2305.15464 |