Detecting quantum properties in physical systems using proxy witnesses
Abstract In practice, it is quite challenging to detect a quantum property, a microscopic property, in a system. In our work, we construct general proxy witnesses of quantum properties to detect their presence in quantum systems and we do so for quantum systems which may possibly be large. In particular, we discuss proxy witnesses for quantum properties like unextendibility, quantum coherence, activation, steerability, and entanglement. We apply these proxy witnesses in some widely considered examples of many-body systems, viz., the quantum Heisenberg models and the quantum J1-J2 model.
Authors
- Ujjwal Sen (ORCID: https://orcid.org/0000-0002-0091-5847)
- Siddhartha Das (ORCID: https://orcid.org/0000-0002-4523-5781)
- Priya Ghosh (ORCID: https://orcid.org/0009-0000-5908-9407)
Institutions
- Harish-Chandra Research Institute (IN)
- International Institute of Information Technology, Hyderabad (IN)
Publication Details
- Journal
- Journal of Physics A Mathematical and Theoretical
- Published
- 2026-10-13
- DOI
- https://doi.org/10.1088/1751-8121/aeb3d6
- Primary Topic
- Quantum many-body systems
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Arthritis National Research Foundation
- European Commission
- Department of Science and Technology, Ministry of Science and Technology, India
- Qingdao University of Science and Technology
- International Institute of Information Technology, Hyderabad
- Science and Engineering Research Board