Adiabatic evolution under quantum control

Details Adiabatic evolution under quantum control Adiabatic evolution under quantum control

2009-10-30

arxiv.org/abs/0910.5859v1

Physics

Quantum Physics

5 pages, 3 figures

Scientific paper

One of the difficulties in adiabatic quantum computation is the limit on the computation time. Here we propose two schemes to speed-up the adiabatic evolution. To apply this controlled adiabatic evolution to adiabatic quantum computation, we design one of the schemes without any prior knowledge of the instantaneous eigenstates of the final Hamiltonian. Whereas in another scheme, the control is constructed with the instantaneous eigenstate that is the target state of the control. As an illustration, we study a two-level system driven by a time-dependent magnetic field under the control. The physics behind the control scheme is explained.

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