| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a highly efficient method of operating a phase gate for a phase gate which is a one-qubit gate of a quantum computer. <P>SOLUTION: A four-level system (four-state system) used in a phase-gate operation is a tripod-shaped four-level system composed of two low-energy states ¾0> and ¾1> utilized for a quantum bit, a low-energy state ¾2> utilized supplementally, and an excited state ¾e>. The frequency of a laser beam applied to shift the phase of the state ¾1> is varied so as to enhance a non-adiabatic effect according to intensity variation of the laser beam. <P>COPYRIGHT: (C)2012,JPO&INPIT |
