Example Concept: Coherence in logical qubits is enhanced by using superconducting qubits with low-loss materials, which reduce energy dissipation and dephasing. Implementing error correction codes, such as the surface code, helps maintain logical qubit states by distributing errors across multiple physical qubits, thus increasing the overall coherence time. Additionally, advanced calibration techniques and cryogenic environments further stabilize qubit states by minimizing thermal noise and other environmental disturbances.