We present a quantum SWAP gate valid for quantum systems of an arbitrary dimension. The gate generalizes the CNOT implementation of the SWAP gate for qubits and keeps its most important properties, like symmetry and simplicity. We only use three copies of the same controlled qudit gate. This gate can be built with two standard higher-dimensional operations, the quantum Fourier transform and the $$d$$ d -dimensional version of the $$C\!Z$$ C Z gate.
Quantum Information Processing – Springer Journals
Published: Aug 14, 2013
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