Transfer of quantum-enhanced information through a many-body system
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912722718818304 |
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| author | Wysocki, Piotr Płodzień, Marcin Chwedeńczuk, Jan |
| author_facet | Wysocki, Piotr Płodzień, Marcin Chwedeńczuk, Jan |
| contents | Forthcoming quantum devices will require high-fidelity information transfer across a many-body system. We formulate the criterion for lossless signal propagation and show that a single qubit can play the role of an antenna, collecting large amounts of information from a complex system. We derive the condition under which the antenna, far from the source and embedded in a many-body interacting medium, can still collect the complete information. A striking feature of this setup is that a single qubit antenna can receive even the full signal amplified by the entanglement of the source. As a consequence, the recovery of this information can be performed with simple single-qubit operations on the antenna (which we fully characterize) rather than with multi-qubit measurements of the source. Finally, we discuss the control of the system parameters necessary for lossless signal propagation. A method discussed here could improve the precision of quantum devices and simplify metrological protocols. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_16994 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Transfer of quantum-enhanced information through a many-body system Wysocki, Piotr Płodzień, Marcin Chwedeńczuk, Jan Quantum Physics Quantum Gases Forthcoming quantum devices will require high-fidelity information transfer across a many-body system. We formulate the criterion for lossless signal propagation and show that a single qubit can play the role of an antenna, collecting large amounts of information from a complex system. We derive the condition under which the antenna, far from the source and embedded in a many-body interacting medium, can still collect the complete information. A striking feature of this setup is that a single qubit antenna can receive even the full signal amplified by the entanglement of the source. As a consequence, the recovery of this information can be performed with simple single-qubit operations on the antenna (which we fully characterize) rather than with multi-qubit measurements of the source. Finally, we discuss the control of the system parameters necessary for lossless signal propagation. A method discussed here could improve the precision of quantum devices and simplify metrological protocols. |
| title | Transfer of quantum-enhanced information through a many-body system |
| topic | Quantum Physics Quantum Gases |
| url | https://arxiv.org/abs/2504.16994 |