Passive Environment-Assisted Quantum Communication with GKP States
Bosonic pure-loss channel, which represents the process of photons decaying into a vacuum environment, has zero quantum capacity when the channel’s transmissivity is less than 50%. Modeled as a beam splitter interaction between the system and its environment, the performance of bosonic pure-loss cha...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2025-04-01
|
| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.15.021003 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849769950440325120 |
|---|---|
| author | Zhaoyou Wang Liang Jiang |
| author_facet | Zhaoyou Wang Liang Jiang |
| author_sort | Zhaoyou Wang |
| collection | DOAJ |
| description | Bosonic pure-loss channel, which represents the process of photons decaying into a vacuum environment, has zero quantum capacity when the channel’s transmissivity is less than 50%. Modeled as a beam splitter interaction between the system and its environment, the performance of bosonic pure-loss channel can be enhanced by controlling the environment state. We show that by choosing the ideal Gottesman-Kitaev-Preskill (GKP) states for the system and its environment, perfect transmission of quantum information through a beam splitter is achievable at arbitrarily low transmissivities. Our explicit constructions allow for experimental demonstration of the improved performance of a quantum channel through passive environment assistance, which is potentially useful for quantum transduction where the environment state can be naturally controlled. In practice, it is crucial to consider finite-energy constraints, and high-fidelity quantum communication through a beam splitter remains achievable with GKP states at the few-photon level. |
| format | Article |
| id | doaj-art-0da773b286ea457db21cc9c9ae6fd1ca |
| institution | DOAJ |
| issn | 2160-3308 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj-art-0da773b286ea457db21cc9c9ae6fd1ca2025-08-20T03:03:12ZengAmerican Physical SocietyPhysical Review X2160-33082025-04-0115202100310.1103/PhysRevX.15.021003Passive Environment-Assisted Quantum Communication with GKP StatesZhaoyou WangLiang JiangBosonic pure-loss channel, which represents the process of photons decaying into a vacuum environment, has zero quantum capacity when the channel’s transmissivity is less than 50%. Modeled as a beam splitter interaction between the system and its environment, the performance of bosonic pure-loss channel can be enhanced by controlling the environment state. We show that by choosing the ideal Gottesman-Kitaev-Preskill (GKP) states for the system and its environment, perfect transmission of quantum information through a beam splitter is achievable at arbitrarily low transmissivities. Our explicit constructions allow for experimental demonstration of the improved performance of a quantum channel through passive environment assistance, which is potentially useful for quantum transduction where the environment state can be naturally controlled. In practice, it is crucial to consider finite-energy constraints, and high-fidelity quantum communication through a beam splitter remains achievable with GKP states at the few-photon level.http://doi.org/10.1103/PhysRevX.15.021003 |
| spellingShingle | Zhaoyou Wang Liang Jiang Passive Environment-Assisted Quantum Communication with GKP States Physical Review X |
| title | Passive Environment-Assisted Quantum Communication with GKP States |
| title_full | Passive Environment-Assisted Quantum Communication with GKP States |
| title_fullStr | Passive Environment-Assisted Quantum Communication with GKP States |
| title_full_unstemmed | Passive Environment-Assisted Quantum Communication with GKP States |
| title_short | Passive Environment-Assisted Quantum Communication with GKP States |
| title_sort | passive environment assisted quantum communication with gkp states |
| url | http://doi.org/10.1103/PhysRevX.15.021003 |
| work_keys_str_mv | AT zhaoyouwang passiveenvironmentassistedquantumcommunicationwithgkpstates AT liangjiang passiveenvironmentassistedquantumcommunicationwithgkpstates |