Standard amplitude amplification for a search space of size $N=2^n$ requires an $n$-qubit register. On NISQNISQ (Noisy Intermediate-Scale Quantum)The current era of quantum computers. They have a decent number of qubits, but they are 'noisy'—meaning they easily lose their quantum state (decoherence) and make errors because they lack perfect error correction. hardware, this is difficult to maintain coherently. DQAA solves this by Partitioning the Search Space. The global $n$-qubit problem is divided into $2^j$ sub-functions using a $j$-bit prefix, and distributed across multiple quantum computers operating on only $n-j$ suffix qubits each.