A Lower and Upper Bound on the Epsilon-Uniform Common Randomness Capacity

We consider a standard two-source model for uniform common randomness (UCR) generation, in which Alice and Bob observe independent and identically distributed (i. i. d.) samples of a correlated finite source and where Alice is allowed to send information to Bob over an arbitrary single-user channel. We study the ϵ-UCR capacity for the proposed model, defined as the maximum common randomness rate one can achieve such that the probability that Alice and Bob do not agree on a common uniform or nearly uniform random variable does not exceed ϵ. We establish a lower and an upper bound on the ϵ-UCR capacity using the bounds on the ϵ-transmission capacity proved by Verdú and Han for arbitrary point-to-point channels.A detailed version with all proofs, explanations and more discussions can be found in [1].