| Issue |
EPL
Volume 119, Number 1, July 2017
|
|
|---|---|---|
| Article Number | 14002 | |
| Number of page(s) | 5 | |
| Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/119/14002 | |
| Published online | 14 September 2017 | |
Experimental preparation of an arbitrary tunable Werner state
1 Institute of Signal Processing Transmission Nanjing University of Posts and Telecommunications Nanjing 210003, China
2 Key Lab of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education - Nanjing 210003, China
3 Department of Physics, Southeast University - Nanjing 210003, China
(b) jianli@seu.edu.cn (corresponding author)
(c) qinw@njupt.edu.cn (corresponding author)
Received: 27 April 2017
Accepted: 14 August 2017
We propose a simple and reliable method for engineering a tunable Werner state and realize it experimentally. The whole setup mainly includes a parametric down-conversion source and a controllable depolarization channel which consists of a Sagnac-like interferometer and some complete dephasing operations. The generated Werner states are characterized by quantum tomography, and very high concurrences and state fidelities can be achieved.
PACS: 42.50.Dv – Quantum state engineering and measurements / 42.50.-p – Quantum optics
© EPLA, 2017
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