  We consider the quantum memory assisted state verification task, where the
local verifiers can store copies of quantum states and measure them
collectively. We establish an exact analytic formula for optimizing two-copy
state verification and give a globally optimal two-copy strategy for
multi-qubit graph states involving only Bell measurements. When arbitrary
memory is available to the verifiers, we present a dimension expansion
technique that designs efficient verification strategies, showcasing its
application to GHZ-like states. These strategies become increasingly
advantageous with growing memory resources, ultimately approaching the
theoretical limit of efficiency. Our findings demonstrate that quantum memories
enhance state verification efficiency, sheding light on error-resistant
strategies and practical applications of large-scale quantum memory-assisted
verification.
