Explore quantum phases and phase transitions through the innovative lens of quantum circuits in this 55-minute conference talk by Xie Chen at ICBS2025. Discover how quantum circuit models provide unique insights into the fundamental properties of quantum many-body systems and their phase behavior. Learn about the theoretical frameworks that connect quantum computation concepts to condensed matter physics, examining how circuit-based approaches can illuminate the nature of quantum phase transitions. Gain understanding of how quantum circuits serve as powerful tools for studying exotic quantum phases of matter and their critical properties. Delve into cutting-edge research that bridges quantum information theory and statistical mechanics, revealing new perspectives on quantum criticality and phase diagrams through computational quantum models.