Sample interview questions: Can you explain the concept of quantum error correction with surface codes and its implications?
Sample answer:
Quantum error correction (QEC) with surface codes is a technique used in quantum computing to protect qubits from noise and errors. Surface codes are a type of topological code that can be implemented on a two-dimensional array of qubits.
In a surface code, each qubit is surrounded by a set of other qubits that are used to detect and correct errors. If an error occurs on a qubit, it will cause a change in the state of the surrounding qubits. This change can be detected by measuring the surrounding qubits. Once the error is detected, it can be corrected by applying a correction operation to the qubit.
Surface codes have a number of advantages over other types of QEC codes. First, they are very efficient. They require only a small number of qubits to protect each data qubit. Second, they are scalable. They can be used to protect large numbers of qubits. Third, they are fault-tolerant. They can tolerate a certain amount of noise and errors without losing data.
The implications of QEC with surf… Read full answer