Advancing Intelligent Sequence Modeling: Evolution, Trade-offs, And Applications Of State- Space Architectures From S4 To Mamba

Abstract

Structured State Space Models (SSMs) have emerged as a transformative paradigm in sequence modeling, addressing critical limitations of Recurrent Neural Networks (RNNs) and Transformers, namely, vanishing gradients, sequential computation bottlenecks, and quadratic memory complexity. By integrating structured recurrence with state-space representations, SSMs achieve linear or near-linear computational scaling while excelling in long-range dependency tasks. This study systematically traces the evolution of SSMs from the foundational Structured State Space Sequence (S4) model to modern variants like Mamba, Simplified Structured State Space Sequence (S5), and Jamba, analyzing architectural innovations that enhance computational efficiency, memory optimization, and inference speed. We critically evaluate trade-offs inherent to SSM design, such as balancing expressiveness with computational constraints and integrating hybrid architectures for domain-specific performance. Across domains incl

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