Universal Quantum Multi‐Qubit Entangling Gates with Auxiliary Spaces
Universal Quantum Multi‐Qubit Entangling Gates with Auxiliary Spaces
Abstract Universal quantum entangling gates are a crucial building block in the large‐scale quantum computation and quantum communication, and it is an important task to find simple ways to implement them. Here an effective quantum circuit for the implementation of a controlled‐NOT (CNOT) gate is constructed by introducing a non‐computational …