The012th KARC Colloquium
The012th KARC Colloquium was ended. Thank you for the participation.
| Date&Time | 19.March, Tuesday 15:00-16:00 |
| Place | Seminar room on the 3rd floor of the 4th Lab building |
| Lecturer | "Processing Quantum Information with Trapped Ions" |
| Speaker | Dr. Wolfgang Lange (Max-Planck Insititute for Quantum optics) |
| Abstract | A string of ions in a linear radio-frequency trap is an almost ideal realization of a quantum register, due to the long decoherence times of electronic hyperfine ground states. Examples include 25Mg and 43Ca. A further advantage of the system is the efficient read-out provided by the electron shelving method. The main technological challenge on the way to an ion-trap quantum computer is coupling the different qubits. Two schemes for the implementation of logic gates in ion traps will be discussed: coupling of the internal states through the vibrational excitation of the ion string and through the interaction with the optical field of a high-finesse cavity. The former requires cooling close to the motional ground state. We propose sympathetic cooling with 115In for this purpose. For optically mediated interaction, strong and deterministic coupling to the cavity field is necessary. We have demonstrated this in a recent experiment involving 40Ca. The method also provides an interface between atomic and photonic qubits. |
| Language | English |
| Admission | Free |
| Organizer | M. Hayasaka |