Example Concept: In superconducting qubits, noise primarily arises from decoherence and gate errors due to interactions with the environment and imperfections in control pulses. Trapped ion systems, while having longer coherence times, face challenges with laser-induced noise and cross-talk between ions. Photonic systems are susceptible to loss and mode mismatch, impacting gate fidelity. Each architecture employs specific error mitigation techniques, such as dynamical decoupling and error correction codes, to enhance gate operation accuracy.