Generation of Quantum Phase Gates via an Unconventional Geometric Phase Shift in an Ion-Trap System

We propose a scheme to generate a quantum phase gate via an unconventional geometric phase shift in an ion-trap system. Since the gate time is only related to the frequency of the vibrational mode, the present scheme, based on the resonant interaction of the trapped ions with a standing-wave laser beam, requires a much shorter gate time than the scheme based on the resonant interaction of the atoms and the cavity. Also the heating effect of the vibrational mode is negligible under certain conditions. We propose a scheme to generate a quantum phase gate via an unconventional geometric phase shift in an ion-trap system. Since the gate time is only related to the frequency of the vibrational mode, the present scheme, based on the resonant interaction of the trapped ions with a standing-wave laser beam, requires a much shorter gate time than the scheme based on the resonant interaction of the atoms and the cavity. Also the heating effect of the vibrational mode is negligible under certain conditions. KCI Citation Count: 2