Natural twoqubit gate for quantum computation using the XY interaction
Abstract
The twoqubit interaction Hamiltonian of a given physical implementation determines whether or not a twoqubit gate such as the controlledNOT (CNOT) gate can be realized easily. It can be shown that, e.g., with the XY interaction more than one twoqubit operation is required in order to realize the CNOT operation. Here we propose a twoqubit gate for the XY interaction which combines the CNOT and SWAP operations. By using this gate quantum circuits can be implemented efficiently, even if only nearestneighbor coupling between the qubits is available.
 Publication:

Physical Review A
 Pub Date:
 March 2003
 DOI:
 10.1103/PhysRevA.67.032301
 arXiv:
 arXiv:quantph/0209035
 Bibcode:
 2003PhRvA..67c2301S
 Keywords:

 03.67.Lx;
 Quantum computation;
 Quantum Physics;
 Condensed Matter
 EPrint:
 8 pages, REVTeX4