Abstract
A modified coherent state is created by mixing a coherent state with optical field from parametric down-conversion in a beam splitter. A two-photon interference effect will cancel the two-photon state. This modified coherent state has advantage over the conventional weak coherent state currently used widely in quantum cryptography. We make numerical analysis on the improvement in secure data rate and transmission distance with the modified coherent state. With a three-photon interference effect to cancel the three-photon state, further improvement is shown to be possible in a newly proposed protocol for quantum cryptography.
| Original language | English |
|---|---|
| Article number | 19 |
| Pages (from-to) | 105-112 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 5551 |
| DOIs | |
| Publication status | Published - 2004 |
| Externally published | Yes |
| Event | Quantum Communications and Quantum Imaging II - Denver, CO, United States Duration: 4 Aug 2004 → 6 Aug 2004 |
Bibliographical note
Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].Research Keywords
- Beam splitter
- Quantum cryptography
- Quantum interference
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