| 講演抄録／キーワード |
| 講演名 |
2019-05-21 09:40
Every entangled state provides an advantage in classical communication
○Stefan Bauml（TU Delft）・Andreas Winter（UAB）・Dong Yang（Univ. Bergen） |
| 抄録 |
（和） |
We investigate whether for any entangled state, including bound entangled states, there exists a quantum channel the classical capacity of which can be increased by providing the state as an additional resource. We show, for any entangled state, the existence of a quantum memory channel the feedback-assisted classical capacity with product encodings of which can be increased by using the state as a resource. Using a different channel construction, we also provide a sufficient entropic condition for an advantage in classical communication and thus provide an example of a state that is not distillable by means of one-way LOCC, but can provide an advantage in the classical communication. As separable states cannot provide such an advantage, our condition also provides an entanglement witness. |
| （英） |
We investigate whether for any entangled state, including bound entangled states, there exists a quantum channel the classical capacity of which can be increased by providing the state as an additional resource. We show, for any entangled state, the existence of a quantum memory channel the feedback-assisted classical capacity with product encodings of which can be increased by using the state as a resource. Using a different channel construction, we also provide a sufficient entropic condition for an advantage in classical communication and thus provide an example of a state that is not distillable by means of one-way LOCC, but can provide an advantage in the classical communication. As separable states cannot provide such an advantage, our condition also provides an entanglement witness. |
| キーワード |
（和） |
Classical Communication over Quantum Channel / Entanglement Assistance / Bound Entanglement / / / / / |
| （英） |
Classical Communication over Quantum Channel / Entanglement Assistance / Bound Entanglement / / / / / |
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信学技報 |
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