Quantum metrology using quantum combs and tensor network formalism
Abstract We develop an efficient algorithm for determining optimal adaptive quantum estimation protocols with arbitrary quantum control operations between subsequent uses of a probed channel.We introduce a tensor network representation of an estimation strategy, which drastically reduces the time and memory consumption of the algorithm, and allows us to analyze metrological protocols involving up to N = 50 qubit channel uses, whereas the state-of-the-art approaches are limited to N < 5. The method is applied to study the performance of the optimal adaptive metrological protocols in presence of various noise types, including correlated noise.
Authors
- Stanisław Kurdziałek (ORCID: https://orcid.org/0000-0001-8877-1421)
- Rafał Demkowicz-Dobrzański (ORCID: https://orcid.org/0000-0001-5550-4431)
- Sagnik Chakraborty (ORCID: https://orcid.org/0000-0001-6345-9757)
- Joanna Majsak (ORCID: https://orcid.org/0000-0001-6612-328X)
- Piotr Dulian (ORCID: https://orcid.org/0009-0006-7312-2844)
Institutions
- Universidad Complutense de Madrid (ES)
- Center for Theoretical Physics (PL)
- Technology Innovation Institute (AE)
- University of Warsaw (PL)
- Polish Academy of Sciences (PL)
Publication Details
- Journal
- New Journal of Physics
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1088/1367-2630/ada8d1
- Citations
- 11
- Primary Topic
- Anomaly Detection Techniques and Applications
- Type
- article
- Field-Weighted Citation Impact
- 27.29
Funders
- Narodowe Centrum Nauki