Assisted distillation of quantum coherence
We introduce and study the task of assisted coherence distillation. This task arises naturally in bipartite systems where both parties work together to generate the maximal possible coherence on one of the subsystems. Only incoherent operations are allowed on the target system, while general local q...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Published: |
American Physical Society
2016
|
| Online Access: | https://eprints.nottingham.ac.uk/40795/ |
| _version_ | 1848796135150321664 |
|---|---|
| author | Chitambar, E. Streltsov, A. Rana, S. Bera, M. N. Adesso, Gerardo Lewenstein, M. |
| author_facet | Chitambar, E. Streltsov, A. Rana, S. Bera, M. N. Adesso, Gerardo Lewenstein, M. |
| author_sort | Chitambar, E. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We introduce and study the task of assisted coherence distillation. This task arises naturally in bipartite systems where both parties work together to generate the maximal possible coherence on one of the subsystems. Only incoherent operations are allowed on the target system, while general local quantum operations are permitted on the other; this is an operational paradigm that we call local quantum-incoherent operations and classical communication. We show that the asymptotic rate of assisted coherence distillation for pure states is equal to the coherence of assistance, an analog of the entanglement of assistance, whose properties we characterize. Our findings imply a novel interpretation of the von Neumann entropy: it quantifies the maximum amount of extra quantum coherence a system can gain when receiving assistance from a collaborative party. Our results are generalized to coherence localization in a multipartite setting and possible applications are discussed. |
| first_indexed | 2025-11-14T19:43:10Z |
| format | Article |
| id | nottingham-40795 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:43:10Z |
| publishDate | 2016 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-407952020-05-04T17:36:21Z https://eprints.nottingham.ac.uk/40795/ Assisted distillation of quantum coherence Chitambar, E. Streltsov, A. Rana, S. Bera, M. N. Adesso, Gerardo Lewenstein, M. We introduce and study the task of assisted coherence distillation. This task arises naturally in bipartite systems where both parties work together to generate the maximal possible coherence on one of the subsystems. Only incoherent operations are allowed on the target system, while general local quantum operations are permitted on the other; this is an operational paradigm that we call local quantum-incoherent operations and classical communication. We show that the asymptotic rate of assisted coherence distillation for pure states is equal to the coherence of assistance, an analog of the entanglement of assistance, whose properties we characterize. Our findings imply a novel interpretation of the von Neumann entropy: it quantifies the maximum amount of extra quantum coherence a system can gain when receiving assistance from a collaborative party. Our results are generalized to coherence localization in a multipartite setting and possible applications are discussed. American Physical Society 2016-02-19 Article PeerReviewed Chitambar, E., Streltsov, A., Rana, S., Bera, M. N., Adesso, Gerardo and Lewenstein, M. (2016) Assisted distillation of quantum coherence. Physical Review Letters, 116 (7). 070402. ISSN 0031-9007 http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.070402 doi:10.1103/PhysRevLett.116.070402 doi:10.1103/PhysRevLett.116.070402 |
| spellingShingle | Chitambar, E. Streltsov, A. Rana, S. Bera, M. N. Adesso, Gerardo Lewenstein, M. Assisted distillation of quantum coherence |
| title | Assisted distillation of quantum coherence |
| title_full | Assisted distillation of quantum coherence |
| title_fullStr | Assisted distillation of quantum coherence |
| title_full_unstemmed | Assisted distillation of quantum coherence |
| title_short | Assisted distillation of quantum coherence |
| title_sort | assisted distillation of quantum coherence |
| url | https://eprints.nottingham.ac.uk/40795/ https://eprints.nottingham.ac.uk/40795/ https://eprints.nottingham.ac.uk/40795/ |