Is there any known nontrivial result on quantum interactive proof (QIP) systems having a space-bounded verifier?
The only paper I know is An application of quantum finite automata to interactive proof systems by Nishimura and Yamakami, in which a restricted 2QFA (two-way quantum finite automaton) model is used as a verifier and the following result is given: $ \mathsf{QIP(2qfa,polytime)} \subseteq \mathsf{NP} $.
The motivation: I am preparing a paper containing some new results on space-bounded QIP systems and I want to be sure not missing any related known result!