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

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

2002-09-04

arxiv.org/abs/quant-ph/0209035v2

Phys. Rev. A 67, 032301 (2003)

Physics

Quantum Physics

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

Scientific paper

10.1103/PhysRevA.67.032301

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.

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