Joint Gaussian measurements of two quantum systems can be used for communication between remote parties, as in teleportation or entanglement swapping protocols. Many types physical error sources throughout a protocol modeled by independent channels acting prior to measurement. In this work we study joint on modes $\mathsf{A}$ and $\mathsf{B}$ that take place after single-mode channels, example ...

In this paper, we consider a general K-user Gaussian multiple-input multiple-output (MIMO) broadcast channel (BC). We assume that the state is deterministic and known to all nodes. While private-message capacity region well be achievable with dirty paper coding (DPC), are interested in simpler linearly precoded transmission schemes. particular, focus on linear precoding schemes combined rate-sp...

This paper characterizes the sum capacity of a class of non-degraded Gaussian vector broadcast channels where a single transmitter with multiple transmit terminals sends independent information to multiple receivers. Coordination is allowed among the transmit terminals, but not among the different receivers. The sum capacity is shown to be a saddlepoint of a Gaussian mutual information game, wh...

This paper determines the sum-capacity of degraded Gaussian K-user interference channels (IFCs). To this end, the paper first develops a family of genie-MAC (multiple access channel) outer bounds for Gaussian K-user interference channels. This family is based on existing genie-aided bounding mechanisms, but differs from current approaches in its optimization problem formulation and application....