Physics – Quantum Physics
Scientific paper
2002-07-07
Phys. Rev. Lett. 89, 097902 (2002)
Physics
Quantum Physics
5 pages, 2 figures; the version published in Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.89.097902
We propose an experimentally feasible scheme to achieve quantum computation based on nonadiabatic geometric phase shifts, in which a cyclic geometric phase is used to realize a set of universal quantum gates. Physical implementation of this set of gates is designed for Josephson junctions and for NMR systems. Interestingly, we find that the nonadiabatic phase shift may be independent of the operation time under appropriate controllable conditions. A remarkable feature of the present nonadiabatic geometric gates is that there is no intrinsic limitation on the operation time, unlike adiabatic geometric gates. Besides fundamental interest, our results may simplify the implementation of geometric quantum computation based on solid state systems, where the decoherence time may be very short.
Wang Zheng-Dong
Zhu Shi-Liang
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