High-dimensional quantum states are potential resources to enhance the channel capacity of information transmission over noisy channels. However, the over-consumption of entanglement and joint measurement make previous proposals of information transmission unpractical , taking quantum dense coding as an example. In this paper, we report high-capacity information transmission over a collective noisy channel using single-photon states both in polarization and spatial mode degrees of freedom and quantum channel multiplexing. Our proposal can reach the same channel capacity as quantum dense coding, even over the collective noisy channel. These results will provide an optional and feasible method to high-capacity information transmission and help to promote the practicability of quantum communication.

中文翻译：

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集体噪声信道上极化和空间模式自由度下具有单光子的大容量信息传输

高维量子态是增强噪声通道上信息传输通道容量的潜在资源。然而，以量子密集编码为例，纠缠和联合测量的过度消耗使得先前的信息传输提议不切实际。在本文中，我们报告了在极化和空间模式自由度以及量子信道多路复用中使用单光子状态的集体噪声信道上的大容量信息传输。我们的建议甚至可以在集体噪声信道上达到与量子密集编码相同的信道容量。这些结果将为大容量信息传输提供一种可选且可行的方法，并有助于促进量子通信的实用性。