Quantum computational gates with radiation free couplings
The European Physical Journal B
219 - 226
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Abstract.We examine a generic three level mechanism of quantum computation in which all fundamentalsingle and double qubit quantum logic gates are operating under the effect of adiabatically controllablestatic (radiation free) bias couplings between the states. Under the time evolution imposed by these biascouplings the quantum state cycles between the two degenerate levels in the ground state and the quantumgates are realized by changing Hamiltonian at certain time intervals when the system collapses to a twostate subspace. We propose a physical implementation of the mechanism using Aharonov-Bohm persistent-current loops in crossed electric and magnetic fields, with the output of the loop read out by using aquantum Hall effect aided mechanism.