| Issue |
EPL
Volume 87, Number 1, July 2009
|
|
|---|---|---|
| Article Number | 10008 | |
| Number of page(s) | 5 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/87/10008 | |
| Published online | 24 July 2009 | |
Quantum state engineering with ququarts: Application for deterministic QKD protocol
1
Faculty of Physics, Moscow State University - Russia
2
International Islamic University Malaysia - Kuala Lumpur, Malaysia
3
MIMOS Berhad - Kuala Lumpusr, Malaysia
Corresponding author: straups@yandex.ru
Received:
3
April
2009
Accepted:
25
June
2009
We discuss the proof-of-principle demonstration of the extended deterministic Quantum Key Distribution (QKD) protocol based on ququarts. The experimental realization is based on the polarization degrees of freedom of two-mode biphotons, making the process of state preparation, transformation and measurement rather simple. The scheme uses only single nonlinear crystal for biphoton generation and linear optical elements for their following transformation and can be used as a base for further practical applications.
PACS: 03.67.Dd – Quantum cryptography and communication security / 42.50.Dv – Quantum state engineering and measurements / 03.67.Hk – Quantum communication
© EPLA, 2009
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