Ions In Thermal Motion Research Articles

Simplified quantum logic gates with trapped ions in thermal motion

A simplified scheme is presented for realizing a two-bit quantum logic gate in an ion trap. As the scheme of Sørensen and Mølmer [Phys. Rev. Lett. 82 (1999) 1971], our scheme is insensitive to the interaction with the environment. However, the quantum controlled-not gate between two ions can

Quantum Computation with Ions in Thermal Motion

We propose an implementation of quantum logic gates via virtual vibrational excitations in an ion-trap quantum computer. Transition paths involving unpopulated vibrational states interfere destructively to eliminate the dependence of rates and revolution frequencies on vibrational quantum numbers. As a consequence, quantum computation becomes feasible with ions whose vibrations are strongly coupled to a thermal reservoir.