Wednesday, September 28, 2022
09:45 - 10:45
Trapped-ions are one of the most mature platforms for quantum computation and quantum simulation. In trapped-ion quantum simulators the spin-spin interactions mediated by the collective motion of the ions in the crystal (phonons) are of the form r-a where 0<a<3. Here, I will show that additional optical tweezer potentials can be used to engineer the phonon spectrum, and thus tune the interactions and connectivity of the ion qubits beyond the power-law interactions accessible in current setups [1, 2].
Next, I will show that the combination of optical tweezers delivering qubit state-dependent local potentials with an oscillating electric field allows us to create a new scalable architecture for trapped-ion quantum computing [2, 4]. Since the electric field allows for long-range qubit-qubit interactions mediated by the center-of-mass motion of the ion crystal alone, it is inherently scalable to large ion crystals. Furthermore, this scheme does not rely on either ground state cooling or the Lamb-Dicke approximation.
 Phys. Rev. A 104, 013302 (2021)
 Phys. Rev. Lett. 127, 260502 (2021)
 In preparation
UvA - Faculty of Science
Arghavan Safavi Naini (UvA / QSoft)