Physics – Quantum Physics
Scientific paper
2002-08-07
Physics
Quantum Physics
Revised version, 9 pages, 15 figures, two-column ReVTeX format, Changes in text, captions, references and abstract have been m
Scientific paper
We show how one can perform arbitrary rotation of any qubit, using delayed laser pulses through nonadiabatic evolution, i.e., via transitions among the adiabatic states. We use a double-Lambda scheme and use a set of control parameters such as detuning, ratio of pulse amplitudes, time-separation of two pulses for realizing different rotations of the qubit. We also investigate the effect of different kinds of chirping, namely linear chirping and hyperbolic tangent chirping. Our work using nonadiabatic evolution adds to the flexibility in the implementation of logic gate operations and show how to achieve control of quantum systems by using different types of pulses.
Agarwal Girish S.
Biswas Asoka
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