dorsal/arxiv
View SchemaExperimental demonstration of tripartite entanglement and controlled dense coding for continuous variables
| Authors | Jietai Jing, Jing Zhang, Ying Yan, Fagang Zhao, Changde Xie, Kunchi Peng |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0210132 |
| URL | https://arxiv.org/abs/quant-ph/0210132 |
| DOI | 10.1103/PhysRevLett.90.167903 |
Abstract
A tripartite entangled state of bright optical field is experimentally produced using an Einstein-Podolsky-Rosen entangled state for continuous variables and linear optics. The controlled dense coding among a sender, a receiver and a controller is demonstrated by exploiting the tripartite entanglement. The obtained three-mode position correlation and relative momentum correlation between the sender and the receiver and thus the improvements of the measured signal to noise ratios of amplitude and phase signals with respect to the shot noise limit are 3.28dB and 3.18dB respectively. If the mean photon number $\bar{n}$ equals 11 the channel capacity can be controllably inverted between 2.91 and 3.14. When $\bar{n}$ is larger than 1.0 and 10.52 the channel capacities of the controlled dense coding exceed the ideal single channel capacities of coherent and squeezed state light communication.
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"abstract": "A tripartite entangled state of bright optical field is experimentally\nproduced using an Einstein-Podolsky-Rosen entangled state for continuous\nvariables and linear optics. The controlled dense coding among a sender, a\nreceiver and a controller is demonstrated by exploiting the tripartite\nentanglement. The obtained three-mode position correlation and relative\nmomentum correlation between the sender and the receiver and thus the\nimprovements of the measured signal to noise ratios of amplitude and phase\nsignals with respect to the shot noise limit are 3.28dB and 3.18dB\nrespectively. If the mean photon number $\\bar{n}$ equals 11 the channel\ncapacity can be controllably inverted between 2.91 and 3.14. When $\\bar{n}$ is\nlarger than 1.0 and 10.52 the channel capacities of the controlled dense coding\nexceed the ideal single channel capacities of coherent and squeezed state light\ncommunication.",
"arxiv_id": "quant-ph/0210132",
"authors": [
"Jietai Jing",
"Jing Zhang",
"Ying Yan",
"Fagang Zhao",
"Changde Xie",
"Kunchi Peng"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.90.167903",
"title": "Experimental demonstration of tripartite entanglement and controlled dense coding for continuous variables",
"url": "https://arxiv.org/abs/quant-ph/0210132"
},
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