Target distribution:{p(x,y)} TB (x,y）~卫 Alternative resource:communication Communication complexity: Comm(p)=min size(message) classical:number of bits. RComm(p) quantum:number of qubits. QComm(p) -Target distribution: {𝑝 𝑥, 𝑦 } • Alternative resource: communication • Communication complexity: Comm(p) = min size(message) – classical: number of bits. - RComm(p) – quantum: number of qubits. - QComm(p) 𝑟𝐵 (𝑥 , 𝑦 )  𝑝 𝑟𝐴