| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 9, 2014
|
|
|---|---|---|
| Article Number | 14057 | |
| Number of page(s) | 6 | |
| DOI | https://doi.org/10.2971/jeos.2014.14057 | |
| Published online | 22 December 2014 | |
Regular paper
Quantum conditional cloning of continuous variable entangled states
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, Peoples Republic of China
Received:
16
August
2014
Revised:
9
December
2014
We extend the technique of conditional preparation to a quantum cloning machine, and present a protocol of 1 → 2 conditional cloning of squeezed state and entanglement states. It is shown that the entanglement degree of the cloned entangled states can be well preserved even when the fidelity between the input and output states is beyond the limit of 4/9. This scheme is practicable since only the linear elements of beam splitters, homodyne detections, optical modulations and electrical trigger system, are involved.
Key words: Quantum cloning / conditional selection / squeezed state / entanglement
© The Author(s) 2014. All rights reserved.
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