We develop the capacity region for the bosonic multiple access channel (MAC) in the presence of thermal-noise added by the environment. Bosonic channel describes quantum-mechanically many practical communication links such as optical, microwave, and radiofrequency. We find that the use of single-mode squeezed states can increase the capacity over that afforded by coherent state encoding when each transmitter is photon-number constrained individually. However, the benefit disappears in the asymptotic regimes of high and low signal-to-noise ratio. Additionally, under a combined total photon-number constraint at the transmitters, no benefit from squeezing is observed over the use of coherent states.

翻译：在环境加热的热噪声下,我们开发了肉音多入口通道的能力区域。博索尼频道描述了量子-机械性的许多实际通信连接,如光学、微波和射频。我们发现,单体挤压状态的使用可以提高每个发报器被光子数量限制的一致状态编码提供的能力。然而,在无药可救的高度和低信号对噪音比率的高度和低信号-噪音制度中,收益消失了。此外,在发射机的总光子数量限制下,对于使用一致状态而言,没有观察到挤压的好处。