Two-qubit Quantum Logic Gate in Molecular Magnets

Details Two-qubit Quantum Logic Gate in Molecular Magnets Two-qubit Quantum Logic Gate in Molecular Magnets

2003-12-21

arxiv.org/abs/quant-ph/0312180v2

Chin. Phys. Lett., 22, 2147(2005)

Physics

Quantum Physics

7 pages, 2 figures

Scientific paper

We proposed a scheme to realize a controlled-NOT quantum logic gate in a dimer of exchange coupled single-molecule magnets, $[\textrm{Mn}_4]_2$. We chosen the ground state and the three low-lying excited states of a dimer in a finite longitudinal magnetic field as the quantum computing bases and introduced a pulsed transverse magnetic field with a special frequency. The pulsed transverse magnetic field induces the transitions between the quantum computing bases so as to realize a controlled-NOT quantum logic gate. The transition rates between the quantum computing bases and between the quantum computing bases and other excited states are evaluated and analyzed.

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