File Download
There are no files associated with this item.
Supplementary
-
Citations:
- Appears in Collections:
Conference Paper: A new decoy state technique with more than three photon intensities
| Title | A new decoy state technique with more than three photon intensities |
|---|---|
| Authors | |
| Issue Date | 2018 |
| Publisher | Southern University of Science and Technology. |
| Citation | Hong Kong-Shenzhen Workshop on Quantum Information Science, Shenzhen, China, 21-24 May 2018 How to Cite? |
| Abstract | Decoy state is now a standard method to close the loophole of quantum cryptography
using Poisson sources. It uses three photon intensities to do the job. One of the
difficulties in decoy-state quantum key distribution (QKD) is that it is not possible to determine
precisely the values of Yn’s, namely the yield for n photon events because apparently
one has to invert a matrix with large condition number in the process. This, in return, limits
the provably secure key rate. Here I show that this comment is not completely correct.
Specifically, one could still improve the provably secure key rate without worrying about
numerical stability. I demonstrate my finding through an example of using more than three
photon intensities in performing decoy-state QKD.
This work is supported by the RGC Grant of the HKSAR Government.
Reference: H. F. Chau, Phys. Rev. A 97, 040301R (2018).
|
| Persistent Identifier | http://hdl.handle.net/10722/253702 |
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Chau, HF | - |
| dc.date.accessioned | 2018-05-25T08:14:34Z | - |
| dc.date.available | 2018-05-25T08:14:34Z | - |
| dc.date.issued | 2018 | - |
| dc.identifier.citation | Hong Kong-Shenzhen Workshop on Quantum Information Science, Shenzhen, China, 21-24 May 2018 | - |
| dc.identifier.uri | http://hdl.handle.net/10722/253702 | - |
| dc.description.abstract | Decoy state is now a standard method to close the loophole of quantum cryptography using Poisson sources. It uses three photon intensities to do the job. One of the difficulties in decoy-state quantum key distribution (QKD) is that it is not possible to determine precisely the values of Yn’s, namely the yield for n photon events because apparently one has to invert a matrix with large condition number in the process. This, in return, limits the provably secure key rate. Here I show that this comment is not completely correct. Specifically, one could still improve the provably secure key rate without worrying about numerical stability. I demonstrate my finding through an example of using more than three photon intensities in performing decoy-state QKD. This work is supported by the RGC Grant of the HKSAR Government. Reference: H. F. Chau, Phys. Rev. A 97, 040301R (2018). | - |
| dc.language | eng | - |
| dc.publisher | Southern University of Science and Technology. | - |
| dc.relation.ispartof | Hong Kong-Shenzhen Workshop on Quantum Information Science | - |
| dc.title | A new decoy state technique with more than three photon intensities | - |
| dc.type | Conference_Paper | - |
| dc.identifier.email | Chau, HF: hfchau@hku.hk | - |
| dc.identifier.authority | Chau, HF=rp00669 | - |
| dc.identifier.hkuros | 285101 | - |
| dc.publisher.place | Shenzhen, China | - |