Minimum construction of two-qubit quantum operations

Details Minimum construction of two-qubit quantum operations Minimum construction of two-qubit quantum operations

2003-12-23

arxiv.org/abs/quant-ph/0312193v2

Phys. Rev. Lett. 93, 020502 (2004)

Physics

Quantum Physics

4 pages

Scientific paper

10.1103/PhysRevLett.93.020502

Optimal construction of quantum operations is a fundamental problem in the realization of quantum computation. We here introduce a newly discovered quantum gate, B, that can implement any arbitrary two-qubit quantum operation with minimal number of both two- and single-qubit gates. We show this by giving an analytic circuit that implements a generic nonlocal two-qubit operation from just two applications of the B gate. We also demonstrate that for the highly scalable Josephson junction charge qubits, the B gate is also more easily and quickly generated than the CNOT gate for physically feasible parameters.

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