Natural two-qubit gate for quantum computation using the XY interaction

Abstract

The two-qubit interaction Hamiltonian of a given physical implementation determines whether or not a two-qubit gate such as the CNOT gate can be realized easily. It can be shown that, e.g., with the XY interaction more than one two-qubit operation is required in order to realize CNOT. Here we propose a two-qubit gate for the XY interaction which combines CNOT with the SWAP operation. By using this gate quantum circuits can be implemented efficiently, even if only nearest-neighbor coupling between the qubits is available.

8 pages, REVTeX4; published version (minor changes, Appendix B added)

References in corpus (1)

• A practical scheme for quantum computation with any two-qubit entangling gate

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