| Title: |
Informational nonequilibrium concentration |
| Authors: |
Hsieh, Chung-Yun; Stratton, Benjamin J; Weng, Hao-Cheng; Scarani, Valerio |
| Source: |
Hsieh, C-Y, Stratton, B J, Weng, H-C & Scarani, V 2025, 'Informational nonequilibrium concentration', Physical Review A, vol. 111, no. 5, 052423. https://doi.org/10.1103/PhysRevA.111.052423 |
| Publication Year: |
2025 |
| Collection: |
University of Bristol: Bristol Reserach |
| Description: |
Informational contributions to thermodynamics can be studied in isolation by considering systems with fully-degenerate Hamiltonians. In this regime, being in non-equilibrium -- termed informational non-equilibrium -- provides thermodynamic resources, such as extractable work, solely from the information content. The usefulness of informational non-equilibrium creates an incentive to obtain more of it, motivating the question of how to concentrate it: can we increase the local informational non-equilibrium of a product state ρ⊗ρ under a global closed system (unitary) evolution? We fully solve this problem analytically, showing that it is impossible for two-qubits, and it is always possible to find states achieving this in higher dimensions. Specifically for two-qutrits, we find that there is a single unitary achieving optimal concentration for every state, for which we uncover a Mepmba-like effect. We further discuss the notion of bound resources in this framework, initial global correlations' ability to activate concentration, and applications to concentrating purity and intrinsic randomness. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/hdl/https://hdl.handle.net/1983/977757bb-b490-41e7-951c-a9a6d609dc89 |
| DOI: |
10.1103/PhysRevA.111.052423 |
| Availability: |
https://hdl.handle.net/1983/977757bb-b490-41e7-951c-a9a6d609dc89; https://research-information.bris.ac.uk/en/publications/977757bb-b490-41e7-951c-a9a6d609dc89; https://doi.org/10.1103/PhysRevA.111.052423 |
| Rights: |
info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.27581940 |
| Database: |
BASE |