Abstract
There have been several upper bounds on the quantum capacity of the single-mode Gaussian channels with thermal noise, such as thermal attenuator and amplifier. We consider a class of attenuator and amplifier with more general noises, including squeezing or even non-Gaussian cases. We introduce new upper bounds on the energy-constrained quantum capacity of those channels by using the conditional quantum entropy power inequality. Also, we obtain lower bounds for the same channels by means of Gaussian optimizer with fixed input entropy. They give narrow bounds when the transmissivity is near unity and the energy of input state is low.
| Original language | English |
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| Title of host publication | 5th International Conference on Quantum Technologies, ICQT 2019 |
| Editors | Aleksey Fedorov, Alexey Rubtsov |
| Publisher | American Institute of Physics Inc. |
| ISBN (Electronic) | 9780735420007 |
| DOIs | |
| Publication status | Published - 23 Jun 2020 |
| Event | 5th International Conference on Quantum Technologies, ICQT 2019 - Moscow, Russian Federation Duration: 15 Jul 2019 → 19 Jul 2019 |
Publication series
| Name | AIP Conference Proceedings |
|---|---|
| Volume | 2241 |
| ISSN (Print) | 0094-243X |
| ISSN (Electronic) | 1551-7616 |
Conference
| Conference | 5th International Conference on Quantum Technologies, ICQT 2019 |
|---|---|
| Country/Territory | Russian Federation |
| City | Moscow |
| Period | 15/07/19 → 19/07/19 |
Bibliographical note
Publisher Copyright:© 2020 Author(s).