Entanglement preserving local thermalization
We investigate whether entanglement can survive the thermalization of subsystems. We present two equivalent formulations of this problem: (1) Can two isolated agents, accessing only preshared randomness, locally thermalize arbitrary input states while maintaining some entanglement? (2) Can thermaliz...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-03-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.013379 |
| _version_ | 1797211465555378176 |
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| author | Chung-Yun Hsieh Matteo Lostaglio Antonio Acín |
| author_facet | Chung-Yun Hsieh Matteo Lostaglio Antonio Acín |
| author_sort | Chung-Yun Hsieh |
| collection | DOAJ |
| description | We investigate whether entanglement can survive the thermalization of subsystems. We present two equivalent formulations of this problem: (1) Can two isolated agents, accessing only preshared randomness, locally thermalize arbitrary input states while maintaining some entanglement? (2) Can thermalization with local heat baths, which may be classically correlated but do not exchange information, locally thermalize arbitrary input states while maintaining some entanglement? We answer these questions in the positive at every nonzero temperature and provide bounds on the amount of preserved entanglement. We provide explicit protocols and discuss their thermodynamic interpretation: we suggest that the underlying mechanism is a speed-up of the subsystem thermalization process. We also present extensions to multipartite systems. Our findings show that entanglement can survive locally performed thermalization processes accessing only classical correlations as a resource. They also suggest a broader study of the channel's ability to preserve resources and of the compatibility between global and local dynamics. |
| first_indexed | 2024-04-24T10:26:55Z |
| format | Article |
| id | doaj.art-49ec5d19dd4d4643a838fab6823c5ec0 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:26:55Z |
| publishDate | 2020-03-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-49ec5d19dd4d4643a838fab6823c5ec02024-04-12T16:52:07ZengAmerican Physical SocietyPhysical Review Research2643-15642020-03-012101337910.1103/PhysRevResearch.2.013379Entanglement preserving local thermalizationChung-Yun HsiehMatteo LostaglioAntonio AcínWe investigate whether entanglement can survive the thermalization of subsystems. We present two equivalent formulations of this problem: (1) Can two isolated agents, accessing only preshared randomness, locally thermalize arbitrary input states while maintaining some entanglement? (2) Can thermalization with local heat baths, which may be classically correlated but do not exchange information, locally thermalize arbitrary input states while maintaining some entanglement? We answer these questions in the positive at every nonzero temperature and provide bounds on the amount of preserved entanglement. We provide explicit protocols and discuss their thermodynamic interpretation: we suggest that the underlying mechanism is a speed-up of the subsystem thermalization process. We also present extensions to multipartite systems. Our findings show that entanglement can survive locally performed thermalization processes accessing only classical correlations as a resource. They also suggest a broader study of the channel's ability to preserve resources and of the compatibility between global and local dynamics.http://doi.org/10.1103/PhysRevResearch.2.013379 |
| spellingShingle | Chung-Yun Hsieh Matteo Lostaglio Antonio Acín Entanglement preserving local thermalization Physical Review Research |
| title | Entanglement preserving local thermalization |
| title_full | Entanglement preserving local thermalization |
| title_fullStr | Entanglement preserving local thermalization |
| title_full_unstemmed | Entanglement preserving local thermalization |
| title_short | Entanglement preserving local thermalization |
| title_sort | entanglement preserving local thermalization |
| url | http://doi.org/10.1103/PhysRevResearch.2.013379 |
| work_keys_str_mv | AT chungyunhsieh entanglementpreservinglocalthermalization AT matteolostaglio entanglementpreservinglocalthermalization AT antonioacin entanglementpreservinglocalthermalization |