Why are quantum LDPC codes interesting?

Question: Why are quantum LDPC codes important in fault-tolerant quantum computing research? A) They eliminate the need for syndrome measurement entirely B) They guarantee transversal T gates for every stabilizer code C) They aim for sparse parity checks and potentially better asymptotic encoding overhead than surface-code-style layouts D) They are always easier to implement on nearest-neighbour two-dimensional hardware Correct: C Explanation: Quantum LDPC codes are studied because sparse checks may allow lower overhead for encoding many logical qubits. However, implementing their nonlocal check structure on realistic hardware can be challenging, so better asymptotic coding properties do not automatically mean simpler hardware execution. Topic: advanced quantum computing / quantum LDPC / fault tolerance